Asset Purchase and Sale Agreement - Enervest Acquisition-II LP, Harken Energy Corp. and Harken Exploration Co.


                       ASSET PURCHASE AND SALE AGREEMENT

                                 BY AND BETWEEN

          ENERVEST ACQUISITION-II LIMITED PARTNERSHIP, AS SELLER, AND

                         HARKEN ENERGY CORPORATION AND

               HARKEN EXPLORATION COMPANY, COLLECTIVELY AS BUYER

                              DATED JULY 10, 1996
   2
                       ASSET PURCHASE AND SALE AGREEMENT

         This Asset Purchase and Sale Agreement ("Agreement") is entered into
this 10th day of July, 1996, by and between ENERVEST ACQUISITION-II LIMITED
PARTNERSHIP, a Texas limited partnership ("Seller"), and HARKEN ENERGY
CORPORATION, a Delaware corporation ("Harken Energy") and HARKEN EXPLORATION
COMPANY, a Delaware corporation ("Exploration"), Harken Energy and Exploration
are called herein collectively "Buyer").  Buyer and Seller are called herein
collectively the "Parties."

                                  WITNESSETH:

         WHEREAS, Seller desires to sell to Buyer certain producing,
nonproducing and undeveloped oil and gas properties and other related assets
and Buyer desires to purchase such properties and assets upon and subject to
the terms and conditions hereinafter provided.

         NOW, THEREFORE, in consideration of the premises and the mutual
promises herein made, and in consideration of the representations, warranties,
and covenants herein contained, the Parties agree as follows:

                                   ARTICLE I
                                  DEFINITIONS

         Capitalized terms used in this Agreement shall have the meanings given
said terms in this Article I or elsewhere in this Agreement.

         "Affiliate" has the meaning set forth in Rule 12b-2 of the regulations
promulgated under the Securities Exchange Act of 1933, as amended (the
"Securities Act").

         "Agreed Rate" means a per annum interest rate equal to the lesser of
(i) the Prime Rate of interest as quoted daily (or at such other interval of
one week or less) in The Wall Street Journal or (ii) the maximum amount of
interest allowed by law.  If The Wall Street Journal ceases to quote the Prime
Rate of interest at least weekly, the referenced rate of interest in (i) above
shall be the rate of interest from time to time announced as its prime
commercial lending rate by the bank which, at the most recent point in time,
held all or the large portion of the Buyer's bank debt.

         "Assets" means Seller's right, title and interest in and to the
following (except to the extent constituting Excluded Assets):

         (i)     All of the Wells described on Exhibit "A" hereto;





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         (ii)    All of the Leases described on Exhibit "A-1" hereto and the
                 Lands covered thereby;

         (iii)   All of the Units, including the Units described on Exhibit
                 "A";

         (iv)    All of the Equipment;

         (v)     All of the licenses, permits, contracts, agreements and other
                 instruments owned by Seller (other than bonds posted by
                 Seller) which concern and relate to any of the Wells, Leases,
                 Lands, and/or Equipment INSOFAR AND ONLY INSOFAR as same
                 concern or relate to the Wells, Leases, Lands, and/or
                 Equipment, or the operation thereof, including, without
                 limitation, oil, gas and condensate purchase and sale
                 contracts; permits; rights-of-way; easements; licenses;
                 servitudes; estates; surface leases; farmin and farmout
                 agreements; division orders and transfer orders; bottomhole
                 agreements; dry hole agreements; area-of-mutual interest
                 agreements; salt water disposal agreements; geologic and
                 geophysical agreements; acreage contribution agreements;
                 operating agreements; balancing agreements; and unit
                 agreements; pooling agreements; pooling orders;
                 communitization agreements; processing, gathering, compression
                 and transportation agreements; facilities or equipment leases
                 relating thereto or used or held for use in connection with
                 the ownership or operation thereof or with the production,
                 treatment, sale or disposal of Hydrocarbons; and all other
                 contracts and agreements related to the Wells, Leases, Lands,
                 and/or Equipment;

         (vi)    All Records and, to the extent transferable, all other
                 contract rights, intangible rights (excluding Seller's
                 trademarks and service marks), inchoate rights, chooses in
                 action, rights under warranties made by prior owners,
                 manufacturers, vendors or other third parties, and rights
                 accruing under applicable statutes of limitation or
                 prescription, attributable to the Assets; and

         (vii)   All payments, and all rights to receive payments, with respect
                 to the ownership of the production of Hydrocarbons from, or
                 the conduct of operations on, the Assets and the interests to
                 be conveyed to Buyer hereunder accruing after the Effective
                 Date.

         "Assumed Liabilities" means any Environmental Liabilities and Losses,
resulting from, arising out of or attributable to the Assets, including,
without limitation, Offsite Environmental Liabilities that arise from, out of,
or are attributable to Materials of Environmental Concern that have been
transported for disposal, reclamation or recycling from the Assets, but in each
case only to the extent such Environmental Liabilities and Losses relate to or
are attributable to the Assets; provided, however, that Assumed





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Liabilities shall not include any Environmental Liabilities or Losses which
Seller has agreed to assume or pay pursuant to any terms of this Agreement.

         "Available Deductible Amount" has the meaning set forth in Article 
6.02(g) hereof.

         "Buyer" has the meaning set forth in the preface to this Agreement.

         "Buyer's Projected Costs" means the costs and expenses associated with
the operation and abandonment of a Well or Unit described on Exhibit "A",
assuming that the Well or Unit continues to produce Hydrocarbons for the time
period necessary for Buyer to realize the Allocated Value for such Well or
Unit.

         "CERCLA" means the Comprehensive Environmental Response, Compensation
and Liability Act, as amended.

         "Closing" has the meaning set forth in Article 3.04 hereof.

         "Closing Date" has the meaning set forth in Article 3.04 hereof.

         "Code" means the Internal Revenue Code of 1986, as amended.

         "Commission" shall mean the Securities and Exchange Commission (or any
successor body thereto).

         "Conveyance Documents" means that certain Assignment, Bill of Sale and
Conveyance in the form attached hereto as Exhibit "C", together with those
other forms of assignments, bills of sale, deeds and other instruments the
Parties agree are necessary or appropriate to convey title to the Assets from
Seller to Buyer.

         "Cure Period" means that period of time from 5:00 p.m. on the date a
Defect Notice was given until 5:00 p.m. on the sixtieth (60th) day following
the date such Defect Notice was given.

         "Defect" means (i) any lien, security interest, collateral assignment,
charge, obligation, encumbrance, irregularity of title or other condition that
causes Seller's title to one or more of the Assets (or any portions thereof) to
be less than Good and Defensible Title (provided, however, notwithstanding
anything else contained herein, Buyer shall not assert as a Defect the
following: (1) the existence of a federal sliding scale royalty burdening part
or all of the Leases (notice of which was provided to Buyer by Seller prior to
Buyer's evaluation of the Assets and offer to purchase same for the Preliminary
Purchase Price set forth herein), even if the application of same would result
in a lesser NRI than set forth in Exhibit A hereto for a particular Well; (2)
any issues relating to lease operating expenses, changed decline curves or
pricing used in the Reserve Report, (3) interest defects in the early chain of
title consisting of the failure to recite marital status





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in documents or omissions of successions of heirship proceedings, (4) defects
arising out of a lack of survey or a lack of corporate authorizations, (5)
defects that have been cured by possession under applicable statutes and
limitations for statutes for prescription and (6) other similar matters that
are not reasonably expected to result in claims that will adversely affect in a
material manner Buyer's title to or ownership of the Assets), (ii) any Plugging
Liability as hereinafter defined, or (iii) any breach of Seller's
representations and warranties contained in Article 4.01 hereof.

         "Defect Adjustment" means an amount of money equal to the sum of the
Defect Amounts for all Defects (but excluding Environmental Defects) asserted
by Buyer under this Agreement as finally determined, whether by agreement or
Expert determination, subject to the deductible provided in Article  5.02(h)
hereof.

         "Defect Amount" means the amount attributable to each Defect or
Environmental Defect, as applicable.

         "Defect Notice" has the meaning set forth in Article 5.02(b) hereof.

         "Effective Date" means 7:00 a.m. local time with respect to each of the
Assets on June 1, 1996.

         "Environmental Defect" has the meaning set forth in Article 6.02(b)
hereof.

         "Environmental Defect Adjustment" means an amount of money equal to
the sum of the Defect Amounts for all Environmental Defects asserted by Buyer
under this Agreement as finally determined, whether by agreement or
Environmental Expert determination award, subject to the deductible provided in
Article 6.02(g) hereof.

         "Environmental Defect Notice" has the meaning set forth in Article
6.02(b) hereof.

         "Environmental Laws" means all federal, state, and local laws,
regulations, ordinances, rules, orders and permits relating to the control of
any pollutant or protection of the environment, including, without limitation,
laws, regulations, ordinances, rules, orders, and permits relating to the
emission, discharge, disposal, treatment, recycling, reclamation, permitting,
manufacture, processing, distribution, generation, storage, transportation,
release or threatened release of, or exposure of persons or property to,
Materials of Environmental Concern.

         "Environmental Liabilities" means any and all costs (including
remedial, removal, response, abatement, cleanup, investigative, and/or
monitoring costs), damages, settlements, expenses (including charges and
assessments, and expenses and costs of investigating, preparing or defending
any action or proceeding), liens, penalties, fines, taxes, pre- judgment and
post-judgment interest, court costs and attorneys' fees incurred or imposed (i)
pursuant to any agreement, order, notice of responsibility, directive





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(including requirements embodied in Environmental Laws), injunction, judgment
or similar documents (including settlements) attributable to or arising out of
or under Environmental Laws, (ii) pursuant to any claim by a government
authority or other entity or person for personal injury, property damage,
damage to natural resources, remediation or response costs arising out of or
associated with any Environmental Matter, or (iii) pursuant to requirements as
of the Closing Date embodied in Environmental Laws.  Environmental Liabilities
do not include (i) liabilities imposed under statutes enacted after the Closing
Date (including the elimination of the exclusion of petroleum from the
definition of "hazardous substance" under CERCLA and the elimination of the
exclusion of oil and gas exploration, development and production wastes from
the definition of "hazardous wastes" under RCRA) or (ii) liabilities imposed
under regulations promulgated or amended after the Closing Date which implement
new requirements.

         "Environmental Matters" means matters resulting from or attributable
to actual, threatened or alleged emissions, discharges or releases of Materials
of Environmental Concern into ambient air, surface water, groundwater, or land,
or otherwise resulting from or attributable to the manufacture, processing,
distribution, use, treatment, storage, disposal, transport or handling of
Materials of Environmental Concern.

         "Environmental Response Notice" has the meaning set forth in Article 
6.02(c) hereof.

         "Equipment" means all the tangible personal property, tools,
machinery, materials, pipelines, gas plants, gathering systems, equipment,
fixtures and improvements, which are incident or attributable to the Wells,
Leases, Lands and/or Units or with the production, treatment, sale or disposal
of Hydrocarbons or water produced therefrom or attributable thereto, on the
Effective Date, including the personal property, materials and equipment listed
on Exhibit "D" hereto.

         "Examination Period" has the meaning set forth in Article 5.02(b)
hereof.

         "Excluded Assets" has the meaning set forth in Article 2.01(b) hereof.

         "Final Settlement Date" has the meaning set forth in Article 9(h)
hereof.

         "Final Settlement Statement" has the meaning set forth in Article 9(h)
hereof.

         "Good and Defensible Title" means, with respect to ownership of Leases
attributable to a Well or Unit, a record title that:

         (i)     entitles Seller to receive, throughout the life of a Well or
                 Unit described on Exhibit "A", at least the NRI for such Well
                 or Unit shown in Exhibit "A", except for decreases in
                 connection with those operations as to which an election is
                 made by Buyer after Closing or with Buyer's consent, to become





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                 a non-consenting co-owner and decreases resulting from those
                 Wells or Units where Seller is obligated to allow others to
                 make up past underproduction and except for
                 horizontal/vertical Pugh clauses and continuous development
                 clauses in the Leases or related agreements;

         (ii)    obligates Seller to bear, throughout the life of a Well or
                 Unit described on Exhibit "A" (and the plugging, abandonment
                 and salvage thereof), no greater WI for such Well or Unit than
                 the WI shown therefor in Exhibit "A", except increases in such
                 WI that result in at least a proportionate increase in
                 Seller's NRI for such Well or Unit (including, without
                 limitation, increases resulting from co-owner non-consents)
                 and increases that result from contribution requirements with
                 respect to defaulting co- owners; and

         (iii)   is free and clear of all liens, security interests, collateral
                 assignments, encumbrances, irregularities and defects except
                 for Permitted Encumbrances.

         "Good and Defensible Title" means, with respect to any other Asset,
record title that:

         (i)     is free from reasonable doubt as to all matters of law and
                 fact such that a reasonably prudent person, engaged in the
                 ownership, development and operation of oil and gas properties
                 or assets, with knowledge of all the facts and appreciation of
                 their legal significance, would be willing to accept title to
                 such property without a reduction in the Allocated Value for
                 such property; and

         (ii)    is free and clear of all liens, security interests, collateral
                 assignments, encumbrances, clouds on title, irregularities and
                 defects except for Permitted Encumbrances.

         "Hydrocarbons" means crude oil, natural gas, casinghead gas, coalbed
methane, condensate, helium, sulphur, S02, C02, natural gas liquids and other
gaseous and liquid hydrocarbons or any combination thereof.

         "Indemnified Party" has the meaning set forth in Article 7.03(a)
hereof.

         "Indemnifying Party" has the meaning set forth in Article 7.03(a)
hereof.

         "Knowledge" means, with respect to a Party hereto, the actual
knowledge of any officer or manager of such Party in charge of a discrete
business area or function having responsibility for the referenced matter after
due inquiry by such officer or manager of the person or persons in charge of
such matter.





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         "Lands" means the lands covered by the Leases as described in Exhibit
A hereto.

         "Leases" means the oil and gas leases or oil, gas, and mineral leases
shown in Exhibit "A-1" hereto.

         "Litigation and Claims" has the meaning set forth in Article 4.01(e)
hereto.

         "Loss" or "Losses" means all damages, payments, penalties, fines,
assessments, costs, amounts paid in settlement, obligations, taxes, losses
(including reductions in the value of Assets), liabilities, expenses and fees
incurred, including court costs and attorneys' fees and expenses and costs of
investigating, preparing or defending any action or proceeding.

         "Material Adverse Event" means Losses or potential Losses that cause
or could cause a reduction in the Preliminary Purchase Price of more than
twenty-five percent (25%).

         "Material Contracts" means any contract or other agreement in force
and effect on the Closing Date affecting Seller's interest in and to one or
more of the Assets and having a net impact to the interest of Seller in excess
of $175,000.

         "Materials of Environmental Concern" means any chemical pollutants,
contaminants, waste, petroleum waste, used oil, toxic substances, hazardous
substances and any other substances that are regulated by any governmental
entity having jurisdiction under any applicable Environmental Law.

         "NRI" means a fractional or percentage interest in and to all
Hydrocarbons produced from or allocated to a Well or Unit described on Exhibit
"A" after deduction of all lessors' royalties, overriding royalties, and other
burdens and payments out of production that burden such fractional or
percentage interest in such Well or Unit.

         "Offsite Environmental Liability" means an Environmental Liability
arising from or attributable to Materials of Environmental Concern that have
been transported for disposal, reclamation or recycling from the Assets to
properties owned by third parties.

         "Parties" has the meaning set forth in the preface above.

         "Permitted Encumbrances" means, with respect to the Assets, the
following:

         (i)     liens for taxes not yet due or, if due, being challenged in
                 good faith by appropriate proceedings;

         (ii)    materialmen's, mechanics' and other similar liens or charges
                 arising in the ordinary course of business for obligations
                 that are not delinquent and that





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                 will be paid or discharged in the ordinary course of business
                 or, if delinquent, that are being contested in good faith in
                 the ordinary course of business;

         (iii)   easements, rights-of-way, servitudes, permits, surface leases,
                 and other rights granted to or reserved for third parties in
                 respect of surface operations (including without limitation
                 those rights set forth in Exhibit "E" attached hereto and made
                 a part hereof for all purposes) that do not materially
                 interfere with the operation of the portion of the Assets
                 burdened thereby;

         (iv)    rights reserved to or vested in any governmental authority to
                 control or regulate any of the Wells or Units and all
                 applicable laws, rules, regulations and orders of such
                 authorities so long as the same:

                 (a)     do not decrease Seller's NRI below the NRI
                         shown in Exhibit "A" or increase Seller's WI
                         above the WI shown in Exhibit "A" without at
                         least a proportionate increase in Seller's
                         NRI, or

                 (b)     do not create any liens in respect of such Wells or
                         Units;

         (v)     liens arising under operating agreements, unitization and
                 pooling agreements, orders and statutes and production sales
                 contracts securing amounts not yet due or, if due, being
                 contested in good faith in the ordinary course of business as
                 set forth in Exhibit "F" attached hereto and made a part
                 hereof for all purposes;

         (vi)    the terms and conditions of all contracts and agreements
                 relating to the Leases and Wells, including, without
                 limitation, exploration agreements, gas sales contracts,
                 processing agreements, farmins, farmouts, operating
                 agreements, and right-of-way agreements, to the extent such
                 terms and conditions:

                 (a)     do not decrease Seller's NRI below the NRI shown in
                         Exhibit "A" or increase Seller's WI above the WI
                         shown in Exhibit "A" without at least a proportionate
                         increase in Seller's NRI,

                 (b)     are normal and customary in the oil and gas industry
                         in the area in which the affected Assets are located,
                         and

                 (c)     would not conflict with any other portion of this 
                         definition of Permitted Encumbrances;





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         (vii)   royalties, overriding royalties, net profits interests,
                 production payments, reversionary interests, and similar
                 interests that do not decrease Seller's NRI below the NRI
                 shown in Exhibit "A" or increase Seller's WI above the WI
                 shown in Exhibit "A"  without at least a proportionate
                 increase in Seller's NRI;

         (viii)  conventional rights of reassignment requiring notice to the
                 holders of the rights prior to surrendering or releasing a
                 leasehold interest;

         (ix)    calls on production exercisable only at prices substantially
                 equivalent to then current fair market value; and

         (x)     Transfer Requirements and Preference Rights other than any
                 such Transfer Requirements or Preference Rights which were
                 applicable to a previous transaction involving the transfer of
                 all or any portion of the Assets but were not complied with at
                 the time of the consummation of such transaction.

         "Phase I Environmental Audit" means an assessment of Seller's
compliance with Environmental Laws relative to the Assets consisting of
examination of Seller's files and public documents, interviews of personnel of
Seller and of other appropriate persons and visual inspection of the Assets.
The  foregoing definition shall not include or authorize any soil borings or
laboratory analysis of soil or groundwater samples on or from the Assets.

         "Plugging Liability" means any Well which, as of the Effective Date,
was not (i) producing or capable of producing Hydrocarbons in paying quantities
or (ii) being used in water disposal or other operations on, for or related to
any of the Assets; provided, however, if the Preliminary Purchase Price is
reduced by a Defect Amount relating to a Plugging Liability and on or before
the date one (1) year after the Closing Date Buyer elects to use such Well for
water disposal or other operations rather than plugging said Well, Buyer shall
refund to Seller an amount equal to the Defect Amount for said Plugging
Liability.

         "Preference Rights" means all rights or agreements that enable or may
enable any third party to purchase or acquire any Asset or any interest therein
or portion thereof as a result of or in connection with (i) the transactions
contemplated by this Agreement or (ii) the execution or delivery of this
Agreement or the consummation or performance of the terms and conditions
contemplated by this Agreement.

         "Preliminary Purchase Price" has the meaning set forth in Article 3.01
hereof.

         "Purchase Price" means the Preliminary Purchase Price, as may be
adjusted pursuant to Articles 5, 6, 9, and 12 hereof.





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         "RCRA" means the Resource Conservation and Recovery Act, as amended.

         "Records" means all originals, copies, computer tapes and discs,
files, records, information or data relating to the Assets in the possession of
Seller or in the possession of Petroleum Financial, Inc., as agent for Seller,
including, without limitation, title records (including abstracts of title,
title opinions, certificates of title and title curative documents), accounting
records and files, contracts, correspondence, production records, electric
logs, core data, pressure data, decline curves, graphical production curves,
geologic and geophysical information, drilling reports, well completion
reports, drill stem test charts and reports, engineering reports, regulatory
reports, and all related materials, INSOFAR AND ONLY INSOFAR as the foregoing
items constitute materials that may be lawfully conveyed to Buyer (i.e. the
materials are not subject to a proprietary agreement precluding their transfer
to Buyer).

         "Related Agreements" means the Conveyance Documents, the Deed of
Trust, the Registration Rights Agreement, and the Warrants.

         "Registration Rights Agreement" has the meaning set forth in Article 
11.01(c) hereof.

         "Reserve Report" means that certain reserve report dated July 3, 1996,
effective as of June 1, 1996, covering the Estimated Future Reserves and Income
Attributable to Certain Leasehold and Royalty Interests of Seller and prepared
by Ryder Scott Company, the Summary Table for which is attached hereto as
Exhibit "B", with Exhibit B and the remainder of said report of which Exhibit B
is a part being made a part hereof for all purposes.

         "Response Notice" has the meaning set forth in Article 5.02(c) hereof.

         "Seller" has the meaning set forth in the preface to this Agreement.

         "Share Adjustment Factor" means a number of Shares determined by
dividing the amount of the relevant adjustment to the Preliminary Purchase
Price by the Average Closing Price.

         "Shares" means shares of the common stock, $0.01 par value per share, 
of Harken Energy.

         "Survival Period" has the meaning set forth in Article 7.01 hereof.

         "Third Party Claim" has the meaning set forth in Article 7.03(a)
hereof.

         "Transfer Requirements" means all consents, approvals, authorizations
or permits of, or filings with or notifications to, any third party which must
be obtained, made or





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complied with for or in connection with the transactions contemplated by this
Agreement in order (a) for such transactions to be effective, (b) to prevent
any termination, cancellation, default, acceleration or change in terms (or any
right arising therefrom) under any terms, conditions or provisions of any Asset
(or of any agreement, instrument or obligation relating to or burdening any
Asset or any interest therein or portion thereof) as a result of such
transactions, or (c) to prevent the creation or imposition of any lien, charge,
penalty, restriction, security interest or encumbrance on or with respect to
any Asset or any interest therein or portion thereof (or any right arising
therefrom) as a result of such transactions.

         "Units" means all unitization, communitization, pooling agreements,
working interest units created by operating agreements, and orders covering the
lands subject to the Leases, or any portion thereof, and the units and pooled
or communitized areas created thereby.

         "Wells" means wells for the production of Hydrocarbons which are
listed in Exhibit "A" or which are located on the Lands.

         "WI" means a fraction or percentage of the costs and expenses
associated with the maintenance, exploration, development, operation and
abandonment of a Well or Unit described on Exhibit "A".

                                   ARTICLE 2
                               SALE AND PURCHASE

         2.01    Sale and Purchase.

         (a)     INCLUDED ASSETS.  Subject to the terms and conditions of this
                 Agreement and in consideration of Buyer's payment to Seller of
                 the Purchase Price as herein provided, the Buyer agrees to
                 purchase from the Seller, and the Seller agrees to sell and
                 convey to Buyer, the Assets.

         (b)     EXCLUDED ASSETS.  Notwithstanding anything herein provided to
                 the contrary, the term "Assets" as used in this Agreement
                 shall not include, and there is excepted, reserved and
                 excluded from the sale contemplated hereby the following
                 ("Excluded Assets"): (i) all cash, deposits, checks, funds,
                 accounts receivable, notes receivable, or similar items
                 attributable to the Assets with respect to any period of time
                 prior to the Effective Date, except for those funds in
                 suspense accounts to be delivered to Buyer pursuant to Article
                 8.01(b)  hereof and (ii) all Hydrocarbon production from or
                 attributable to the Assets with respect to all periods prior
                 to the Effective Date and all proceeds attributable thereto,
                 and all Hydrocarbons that, at the Effective Date, are owned by
                 Seller and are in storage or otherwise held in inventory and
                 all proceeds attributable thereto.





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                                   ARTICLE 3
                                 PURCHASE PRICE

         3.01    Preliminary Purchase Price.  In consideration for the sale and
conveyance to Buyer of the Assets (and subject to the other terms and
conditions hereof), the Buyer agrees to tender to the Seller in the manner
hereinafter provided the following cash and capital stock consideration (the
"Preliminary Purchase Price"), the aggregate value of which the Parties agree
is Fifteen Million Two Hundred Thousand Dollars ($15,200,000):

         (a)     CASH CONSIDERATION.  The cash sum of Five Million Dollars
                 ($5,000,000) (the "Cash Consideration"), payable at Closing.

         (b)     TRANCHE A SHARES.  One Million Five Hundred Fifty Thousand
                 (1,550,000) Shares to be issued by Harken Energy in favor of
                 Seller within thirty (30) days after the Closing Date (the
                 "Tranche A Shares").

         (c)     TRANCHE B SHARES.  An additional One Million One Hundred
                 Fifty-nine Thousand and Ninety-one (1,159,091) Shares,
                 adjusted as hereinafter provided, to be issued by Harken
                 Energy in favor of Seller at the Tranche A Expiration Point,
                 as defined in Article 8.03(a) hereof (the "Tranche B Shares").

         (d)     TRANCHE C SHARES.  Certain additional contingent Shares to be
                 issued in accordance with the provisions of Article 8.03(c)
                 hereof (the "Tranche C Shares").

         3.02    Additional Consideration.  As additional consideration for the
sale of the Assets, Harken Energy shall issue to Seller, at the Closing, a
warrant or warrants, substantially in the form of Exhibit "3.02" attached
hereto and made a part hereof for all purposes in all material respects, issued
in favor of Seller or Seller's affiliates (as designated by Seller prior to
Closing), entitling the holders thereof to purchase 300,000 Shares ("the
Warrants").

         3.03    Security.

         (a)     CREATION OF LIEN, MORTGAGE AND SECURITY INTEREST.  To secure
                 the payment of at least Seven Million Dollars ($7,000,000) of
                 the Preliminary Purchase Price (other than and in addition to
                 the Cash Consideration), at Closing, Seller shall retain a
                 first priority lien, mortgage and purchase money security
                 interest in and to an undivided fifty percent (50%) of all of
                 the interests in and to the Assets conveyed by Seller to Buyer
                 pursuant hereto (the "Mortgaged Interests").  Said lien,
                 mortgage and purchase money security interest shall be
                 evidenced by a Mortgage, Deed of Trust and Security Agreement
                 substantially in the form of Exhibit "3.03", attached





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                 hereto and made a part hereof for all purposes, to be executed
                 and delivered by Buyer to Seller at the Closing (the "Deed of
                 Trust").

         (b)     RELEASES.  Buyer shall have the right to request and obtain
                 from Seller  up to seven (7) partial releases of the Deed of
                 Trust releasing an undivided interest in and to the Mortgaged
                 Interests equal to the quotient obtained by dividing the
                 Aggregate Proceeds by $7,000,000.  The first two (2) such
                 partial releases requested by Buyer shall be at the expense of
                 Seller and any such additional partial releases shall be at
                 the expense of Buyer.  Seller shall execute and deliver to
                 Buyer a final release of the Deed of Trust within ten (10)
                 business days after the date Seller has received Aggregate
                 Proceeds equal to or greater than $7,000,000.  Buyer shall
                 have the right to require Seller to register the Tranche C
                 Shares simultaneously with any other applicable registration
                 undertaken by Seller after the issuance of the Tranche C
                 Shares as further set forth in the Registration Rights
                 Agreement.

         (c)     FORECLOSURE.  If Seller has not received Aggregate Tranche
                 A/B/C Realized Proceeds in excess of $7,000,000 on or before
                 the date six (6) months after the effective date of the
                 registration of the Tranche  C Shares (the "Foreclosure
                 Trigger Date"), Seller shall have the right to foreclose upon
                 its Deed of Trust and the liens, mortgages and security
                 interests created thereby in a proportionate part of the
                 Mortgaged Interests equal to the ratio which the difference
                 between $7,000,000 and the Aggregate Tranche A/B/C Realized
                 Proceeds bears to Seven Million Dollars ($7,000,000).

         3.04    The Closing.  The closing of the transactions contemplated by
this Agreement (the "Closing") shall take place at the offices of the Buyer,
5605 North MacArthur, Suite 400, Irving, Texas 75038, simultaneously with the
execution of this Agreement on July 10, 1996, or at such other place, date and
time as the Buyer and the Seller may mutually determine (the "Closing Date").

         3.05    Deliveries at the Closing.  At the Closing or as otherwise set
forth in Article 11, (i) the Seller will deliver to the Buyer the  documents
referred to in Article 11.01 below, (ii) the Buyer will deliver to the Seller
the documents referred to in Article 11.02 below, and (iii) the Buyer will
deliver to the Seller the Cash Consideration by wire transfer or delivery of
other immediately available funds.

         3.06    Purchase Price Allocations.  The Preliminary Purchase Price
shall be allocated among the Assets in accordance with the terms of this
Article 3.06.  Each Asset shall be allocated that portion of the Preliminary
Purchase Price (the "Allocated Value") which is equal to the net present value
for each such Asset as set forth in the  Reserve Report multiplied by the
number .9538.  Seller and Buyer acknowledge that this is a proper allocation of
the Preliminary Purchase Price and that the Purchase Price shall be reallocated
to the Assets after accounting for any adjustments pursuant to Articles 5, 6,





                                       13
   15
9, and 12 hereof, and Seller and Buyer each agree that for all income and
franchise tax purposes (and, where applicable, financial accounting purposes)
they will report consistently with such allocation.


                                   ARTICLE 4
                         REPRESENTATIONS AND WARRANTIES

         4.01    Representations and Warranties of Seller.  The Seller
represents and warrants to Buyer that the statements contained in this Article
4.01 are true and correct as of the Closing Date:

         (a)     ORGANIZATION OF SELLER.  The Seller is a limited partnership
                 duly organized, validly existing and in good standing under
                 the laws of the State of Texas.

         (b)     AUTHORIZATION OF TRANSACTION.  The Seller has full power and
                 authority to execute and deliver this Agreement and each of
                 the Related Agreements to which it is a party and to perform
                 its obligations hereunder and thereunder.  This Agreement and
                 each of the Related Agreements to which it is a party
                 constitute the valid and legally binding obligation of the
                 Seller, enforceable against the Seller in accordance with
                 their respective terms and conditions except as such
                 enforceability may be limited by or subject to (a) any
                 bankruptcy, insolvency, reorganization, moratorium or other
                 similar laws relating to creditors' rights generally and (b)
                 general principles of equity (regardless of whether such
                 enforceability is considered in a proceeding in equity or at
                 law).  Except for (i) consents of or filings with the United
                 States Department of Interior or other governmental agency or
                 the applicable state or Indian agencies or authorities in
                 connection with the assignment of any federal, state, or
                 Indian leases or any interest therein, and (ii) other Transfer
                 Requirements and Preference Rights which are applicable to the
                 transactions contemplated by this Agreement or any Related
                 Agreements to which it is a party, the Seller need not give
                 any notice to, make any filing with, or obtain any
                 authorization, consent or approval of, any government or
                 governmental agency or any other person or entity in order to
                 consummate the transactions contemplated by this Agreement or
                 any Related Agreements to which it is a party.

         (c)     NONCONTRAVENTION.  Neither the execution and the delivery of
                 this Agreement or any Related Agreements to which it is a
                 party, nor the consummation by the Seller of the transactions
                 contemplated hereby or thereby, will in any material respect
                 violate any statute, regulation, rule, injunction, judgment,
                 order, decree, or ruling of any government, governmental
                 agency, or court to which the Seller is subject, or any





                                       14
   16
                 provision of its limited partnership agreement or any
                 agreement or instrument to which Seller is a party.

         (d)     BROKER'S FEES.  The Seller has incurred no liability,
                 contingent or otherwise, for broker's or finder's fees with
                 respect to the transactions contemplated by this Agreement for
                 which Buyer shall have any responsibility whatsoever.

         (e)     LITIGATION AND CLAIMS.  At the Effective Date there were no,
                 since the Effective Date there have not been any, and as of
                 the date of this Agreement there are no lawsuits, orders,
                 decrees, injunctions or administrative, arbitration or other
                 proceedings pending or, to the Knowledge of Seller, individual
                 claims in excess of $10,000 or aggregate claims in excess of
                 $50,000 which are  threatened (collectively, the "Litigation
                 and Claims"), against the Seller or, to the Knowledge of
                 Seller, against the operator of any of the Assets.

         (f)     CONDITION OF ASSETS.  The Assets have been maintained in a
                 state of repair so as to be adequate for normal operations.

         (g)     NORMAL BUSINESS.  Since the Effective Date, Seller (i) has
                 caused the Assets to be maintained and operated in a good and
                 workmanlike manner, consistent with prior operations and (ii)
                 has not transferred or sold any Assets other than (1)
                 Hydrocarbons produced, saved, and sold from the Assets in the
                 ordinary course of business, (2) personal property and
                 equipment which has been replaced with personal property and
                 equipment of comparable or better value and utility in the
                 ordinary and routine maintenance and operation of the Assets,
                 and (3) transfers or disposal of items of personal property
                 having a value of less than $10,000 individually or $50,000 in
                 the aggregate.

         (h)     TAXES.  Seller has paid or caused to be paid all federal,
                 state, and local taxes, rates and like assessments for periods
                 prior to the Closing Date that have become due and payable
                 which, if not so paid, could result in a lien or encumbrance
                 upon the Assets, including excise, property, ad valorem,
                 franchise, severance and production taxes; but not including
                 (i) taxes, rates and like assessments which are being
                 contested in good faith, as shown on Item (h) of Schedule
                 4.01, (ii) taxes not yet due and payable and (iii) taxes which
                 are the responsibility of Buyer.

         (i)     NO VIOLATIONS.  Except as listed in Item (i) of Schedule 4.01,
                 to the Seller's Knowledge, Seller has not violated or received
                 notice of probable violation of any regulations, rules or
                 orders promulgated by any federal, state or local regulatory
                 agency or governmental authority which, if adversely decided,





                                       15
   17
                 would have a Material Adverse Effect on the operation of the
                 Assets or the revenues attributable thereto.

         (j)     MATERIAL CONTRACTS.  Part I Item (j) of Schedule 4.01 hereto
                 is a listing of all Material Contracts relating to the Assets
                 operated by Seller as of the Closing Date, and Part II of Item
                 (j) of Schedule 4.01 is a listing, to Seller's Knowledge, of
                 all Material Contracts relating to the Assets which are not
                 operated by Seller as of the date of Closing and, with respect
                 to all such Material Contracts, neither Seller nor, to
                 Seller's Knowledge, any other party thereto, is in default
                 thereunder or in breach thereof.

         (k)     TAKE-OR-PAY.  Seller has not made any agreement relating to
                 the Assets which required Seller between the Effective Date
                 and the Closing Date or Buyer, following Closing, to (i)
                 deliver gas paid for, but not taken from production prior to
                 the Effective Date, or (ii) make a cash payment to a buyer of
                 gas for reimbursement or recoupment of prior take-or-pay
                 payments which cannot be accomplished through such buyer
                 taking gas production, or (iii) deliver hydrocarbons or
                 products produced from the Assets at some future time without
                 then receiving the full payment therefor it would have
                 received absent such agreement or condition.

         (l)     ROYALTIES.  To Seller's Knowledge, all rentals, royalties,
                 overriding royalties and other payments in or measured by
                 production to be paid by Seller with respect to the Assets
                 have been timely, properly and fully paid, except for those
                 funds held in or allocated to suspense accounts in the
                 ordinary course of business which will be remitted to Buyer
                 pursuant to Article 8.01(b) hereof.

         (m)     PERMITS AND LICENSES.  Except for those items referred to in
                 Article 4.01(b) above, to the Knowledge of Seller, Seller has
                 obtained and currently holds all permits, licenses, approvals
                 and authorizations which are required under federal, state or
                 local law, rules and regulations in order to own and operate
                 the Assets and, except for those items referred to in Article
                 4.01(b), no such permit, license, approval or authorization
                 restricts Seller from selling or otherwise transferring to
                 Buyer Seller's interest in the Assets.

         (n)     WELLS.  All Wells located on the Lands, other than Wells which
                 have been plugged and abandoned, are set forth in Exhibit "A"
                 hereto.

         (o)     OPERATION OF ASSETS.  From the Effective Date until the
                 Closing Date, except as otherwise consented to by Buyer in
                 writing, Seller has (i) not mortgaged, pledged or subjected to
                 any security interest any of the Assets; (ii) not entered into
                 any termination or amendment of any agreement affecting the
                 Assets except in the ordinary course of business; (iii) not





                                       16
   18
                 entered into any settlement of any pending or threatened
                 litigation involving any of the Assets or cause a surrender of
                 the Assets; (iv) not consented to the entry of any decree or
                 order by a governmental body or pay any fine having an adverse
                 effect of more than $5,000 (U.S.) to the Assets; (v) not
                 entered into any agreement affecting the Assets with a term in
                 excess of (30) days, unless such transaction is in the
                 ordinary course of business and has a term of six (6) months
                 or less; (vi) not made an expenditure with respect to any of
                 the Assets which exceeds the amount expendable by operator
                 without non-operator approval under the applicable operating
                 agreement; (vii) used its best efforts to take all action
                 necessary to comply with any Preference Right affecting the
                 Assets; and (viii) used its best efforts not to subject to any
                 lien, claim or encumbrance any of the Assets.


         4.02    Representations and Warranties of Buyer.  Each of Harken
Energy and Exploration represents and warrants to Seller that the statements
contained in this Article 4.02 are true and correct as of the Closing Date:

         (a)     ORGANIZATION OF BUYER.  Each of Harken Energy and Exploration
                 is a corporation, duly organized, validly existing and in good
                 standing under the laws of the State of Delaware.

         (b)     AUTHORIZATION OF TRANSACTION.  Each of Harken Energy and
                 Exploration has full power and authority to execute and
                 deliver this Agreement and each Related Agreement to which it
                 is a party and to perform its obligations hereunder and
                 thereunder, and this Agreement and each Related Agreement to
                 which it is a party constitutes the valid and legally binding
                 obligation of each of Harken Energy and Exploration,
                 enforceable against each of Harken Energy and Exploration in
                 accordance with their respective terms and conditions, except
                 as such enforceability may be limited by or subject to (a) any
                 bankruptcy, insolvency, reorganization, moratorium or other
                 similar laws relating to creditors' rights generally and (b)
                 general principals of equity (regardless of whether such
                 enforceability is considered in a proceeding in equity or at
                 law).  Except for (i) consents of or filings with the United
                 States Department of Interior or other governmental agency or
                 the applicable state or Indian agencies or authorities in
                 connection with the assignment of any federal, state, or
                 Indian leases or any interest therein, and (ii) other Transfer
                 Requirements which are applicable to the transactions
                 contemplated by this Agreement or any Related Agreement to
                 which it is a party, neither Harken Energy nor Exploration
                 needs to give any notice to, make any filing with, or obtain
                 any authorization, consent or approval of, any government or
                 governmental agency or any other person or entity in order to
                 consummate the transactions contemplated by this Agreement or
                 any Related Agreement to which it is a party.





                                       17
   19
         (c)     NONCONTRAVENTION.  Neither the execution and the delivery of
                 this Agreement or any Related Agreement to which it is a
                 party, nor the consummation by Harken Energy or Exploration of
                 the transactions contemplated hereby or thereby, will in any
                 material respect violate any statute, regulation, rule,
                 injunction, judgment, order, decree, or ruling of any
                 government, governmental agency, or court to which Harken
                 Energy or Exploration is subject, or any provision of any
                 agreement or instrument to which Harken Energy or Exploration
                 is a party.

         (d)     BROKER'S FEES.  Neither Harken Energy nor Exploration has
                 incurred any liability, contingent or otherwise, for broker's
                 or finder's fees with respect to the transactions contemplated
                 by this Agreement for which Seller shall have any
                 responsibility whatsoever.

         (e)     FINANCIAL ABILITY.  Each of Harken Energy and Exploration has,
                 and at all relevant times will continue to have, sufficient
                 funds and credit arrangements or other arrangements to tender
                 the Cash Consideration at the Closing, to issue the Tranche A
                 shares, any required Deficiency Shares, the Tranche B Shares,
                 the Tranche C Shares, the Warrants and the Shares represented
                 by the Warrants and to take such other actions as may be
                 required by either of them to consummate the transactions
                 contemplated hereby.

         (f)     TRANCHE A SHARES.  The Tranche A Shares to be received by
                 Seller (i) have been duly authorized, and (ii) within thirty
                 (30) days after the Closing Date, will be validly issued,
                 fully paid, nonassessable, and not issued in violation of any
                 preemptive rights or any applicable laws, rules or
                 regulations.  Such Shares will, upon delivery thereof, be free
                 and clear of all liens, charges, pledges, encumbrances,
                 equities and claims whatsoever other than those created by
                 Seller.

         (g)     TRANCHE B SHARES, TRANCHE C SHARES AND DEFICIENCY SHARES.  The
                 Tranche B Shares, the Deficiency Shares, if any, and the
                 Tranche C Shares, if any, to be received by Seller (i) have
                 been duly authorized, and (ii) at the time of their issuance,
                 will be validly issued, fully paid, nonassessable, and not
                 issued in violation of any preemptive rights or any applicable
                 laws, rules or regulations.  Such shares will, upon delivery
                 thereof, be free and clear of all liens, charges, pledges,
                 encumbrances, equities and claims whatsoever other than those
                 created by Seller.

         (h)     WARRANTS.  The Warrants to be issued by Harken Energy at
                 Closing have been duly authorized for such issuance and, when
                 issued and delivered by Harken Energy in accordance with the
                 provisions of this Agreement, will be validly issued and will
                 constitute valid, legal and binding obligations of





                                       18
   20
                 Harken Energy enforceable against Harken Energy in accordance
                 with their respective terms.  The Shares issuable upon the
                 exercise of the Warrants have been duly reserved for such
                 issuance and, when issued and delivered by Harken Energy in
                 accordance with the provisions of the Warrants, will be
                 validly issued, fully paid and non-assessable.

         (i)     OWNERSHIP OF HARKEN ENERGY AND EXPLORATION.  Set forth on
                 Exhibit "4.02(i)" attached hereto and made a part hereof for
                 all purposes is the authorized capitalization of Harken Energy
                 and Exploration and the number of shares of their respective
                 capital stock (or other equity interests) issued and
                 outstanding as of the date hereof.

         (j)     SECURITIES FILINGS.  As of the date hereof, except for
                 disclosure with respect to the transactions contemplated
                 hereby, the description of Harken Energy's business and the
                 condition of Harken Energy (financial and otherwise) as
                 described in Harken Energy's Annual Report on Form 10-K for
                 the year ended December 31, 1995, or Harken Energy's Quarterly
                 Report on Form 10-Q for the quarter ended March 31, 1996, as
                 amended or supplemented prior to the date hereof (the "SEC
                 Documents"), did not at the time of their filing with the
                 Commission contain an untrue statement of a material fact and
                 do not omit to state a material fact necessary to make the
                 statements contained therein not misleading and otherwise
                 complies in all material respect with the Securities Exchange
                 Act of 1934 and the rules and regulations promulgated
                 thereunder (the "Exchange Act").  Harken Energy has filed
                 reports, and is in all compliance with, Section 13 and 15(d)
                 of the Exchange Act.  No material adverse change in the
                 business or condition (financial or otherwise) of Harken
                 Energy or Exploration has occurred from December 31, 1995
                 through the date hereof.  There are no material liabilities
                 (contingent or otherwise) of Harken Energy or Exploration,
                 other than as disclosed in the SEC Documents and the financial
                 statements included therein.

         (k)     DEFECT NOTICES AND ENVIRONMENTAL DEFECT NOTICES.  Prior to the
                 Closing date, Buyer has provided written Defect Notices and
                 Environmental Defect Notices with respect to all Defects and
                 Environmental Defects of which Buyer has knowledge as of 
                 Closing Date hereof.

                                   ARTICLE 5
                     TITLE MATTERS AND SELLER'S BREACHES OF
                         REPRESENTATIONS AND WARRANTIES

         5.01    No Warranty or Representation.  At the Closing, Seller shall
convey to Buyer all the Assets.  Such conveyance shall be subject to the
Permitted Encumbrances and WITHOUT ANY WARRANTY OF TITLE, EITHER EXPRESS OR
IMPLIED, AND





                                       19
   21
WHETHER BY COMMON LAW, STATUTE OR OTHERWISE, except for the warranty of title
as to persons claiming by, through and under Seller contained in the Conveyance
Documents delivered pursuant to Article 11.01(a) hereof. Without limiting
Buyer's right to reduce the Purchase Price in the manner provided in this
Article 5, Seller makes no warranty or representation, express or implied, with
respect to the accuracy or completeness of any information, Records or data
now, heretofore, or hereafter made available to Buyer in connection with this
Agreement, including, without limitation, any description of the Assets set
forth in Exhibit "A" or Exhibit "A-1", pricing assumptions, potential for
production of Hydrocarbons from the Assets, or any other matters contained in
any material furnished by Seller to Buyer or its officers, directors,
employees, agents, advisors or representatives.  Nothing in this Article 5
shall operate to expand or increase or limit Seller's representations and
warranties contained in other parts of this Agreement or to limit the
provisions of Article 14.13.

         5.02    Defect.  The procedures to be followed with respect to Buyer's
assertion of Defects concerning the Assets and adjustment of the Preliminary
Purchase Price attributable to such Defects shall be as follows:

         (a)     ACCESS TO RECORDS.  Prior to the execution of this Agreement,
                 Seller has provided Buyer and its consultants and advisors
                 access at all reasonable times to Seller's accounting, land,
                 production, engineering, and other Records regarding the
                 Assets for the purpose of reviewing title to the Assets and
                 the accuracy of Seller's representations and warranties
                 contained in Articles 4.01 and 6.02(a) hereof and reasonable
                 office space in Seller's offices for such review.  To the
                 extent any such Records are in possession of a co-working
                 interest owner, partner or third party and Seller has the
                 right of access thereto, Seller has used its reasonable
                 efforts (without being obligated to incur expense) to provide
                 Buyer access to such other Records or obtain copies thereof
                 for Buyer's review.

         (b)     NOTICE OF ASSERTED DEFECTS.  Prior to the expiration of the
                 period ending  ninety (90) days after the Records Delivery
                 Date (the "Examination Period"), Buyer shall furnish to Seller
                 written notice specifying in reasonable detail each matter
                 which, in Buyer's opinion, constitutes a Defect and which
                 Buyer wishes to assert as a Defect hereunder, together with
                 the Defect Amount estimated by Buyer for each such asserted
                 Defect (each such notice being called a "Defect Notice").  In
                 the event the Defect is a Plugging Liability, the Defect
                 Notice shall be in the form of an AFE for the plugging and
                 abandonment of the relevant Well setting forth all costs and
                 expenses associated therewith, the anticipated salvage value
                 for all equipment and other materials recovered from the Well
                 and reflecting Seller's pro rata share of such net costs and
                 expenses.  Any Defects not asserted on or before the
                 expiration of the Examination Period with respect to the
                 Assets, shall be deemed conclusively to be waived by Buyer.
                 Failure by Buyer to





                                       20
   22
                 identify all Assets (or to identify all portions of an Asset)
                 which are subject to a particular Defect in a Defect Notice
                 shall not prevent Buyer from asserting such Defect in separate
                 or subsequent Defect Notices, subject to otherwise timely
                 asserting such Defect prior to the expiration of the
                 Examination Period.

         (c)     NOTICE IN RESPONSE TO BUYER'S NOTICE.  On or before 5:00 p.m.
                 on the fifth (5th) business day following Seller's receipt of
                 a Defect Notice from Buyer, Seller shall give written notice
                 to Buyer for each Defect asserted in a Defect Notice
                 ("Response Notice") as to whether it (a) intends to cure the
                 asserted Defect, (b) disagrees with Buyer's assertion that the
                 Defect exists, (c) disagrees with the Defect Amount estimated
                 by Buyer for such Defect, or (d) takes any combination of the
                 foregoing positions.  If Seller disagrees with Buyer's
                 assertion of the existence of a Defect or the Defect Amount
                 with respect thereto, Seller's Response Notice shall also
                 specify in reasonable detail Seller's grounds for such
                 disagreement, the Defect Amount estimated by Seller therefor,
                 or both, as the case may be.  Seller's failure to include in
                 its Response Notice a Defect asserted in a Defect Notice shall
                 be deemed to be an admission of the existence of such Defect,
                 acceptance of Buyer's estimate of the Defect Amount with
                 respect thereto and a waiver of Seller's rights to cure such
                 Defect.

         (d)     METHOD OF DETERMINING DEFECT AMOUNTS.  Without limiting
                 Seller's right to dispute the existence of a Defect, Defect
                 Amounts for each asserted Defect shall be determined as
                 follows:

                 (i)      If the Defect results in the failure of the entirety
                          of Seller's title to an Asset, the Defect Amount
                          shall be the Allocated Value for that Asset.

                 (ii)     If the Defect results from a lien, security interest,
                          pledge or collateral assignment upon one or more
                          Assets (or a portion thereof) which is liquidated in
                          amount, then the Defect Amount shall be the amount
                          necessary to remove such lien, security interest,
                          pledge or collateral assignment from Seller's title
                          to such one or more Assets (or portion thereof).

                 (iii)    If the Defect results from Seller having a lesser NRI
                          in a Well or Unit described in Exhibit "A" than the
                          NRI specified therefor in Exhibit "A", the Defect
                          Amount shall be equal to the product obtained by
                          multiplying the Allocated Value for that Well or Unit
                          by a fraction, the numerator of which is the
                          reduction in the NRI and the denominator of which is
                          the NRI specified for such Well or Unit in Exhibit
                          "A".





                                       21
   23
                 (iv)     If the Defect results from Seller having a greater WI
                          in a Well or Unit described in Exhibit "A" than the
                          WI specified therefor in Exhibit "A" without a
                          proportionate increase in the NRI, the Defect Amount
                          shall be equal to the present value (discounted at
                          10% compounded annually) of the increase in Buyer's
                          Projected Costs with respect to such Well or Unit for
                          the period from and after the Effective Date which is
                          attributable to such increase in the WI.

                 (v)      If the Defect results from any matter not described
                          in paragraphs (i), (ii), (iii), or (iv) above, then
                          the Defect Amount shall be a portion of the Allocated
                          Value for that Asset, said portion to be equal to the
                          difference between the value of Seller's interest in
                          such Asset without such Defect and with such Defect
                          (assuming the value without such Defect to be the
                          Allocated Value).

                 (vi)     If a Defect is not effective or does not affect
                          Seller's title to an Asset throughout the entire
                          productive life of such Asset, such fact shall be
                          taken into account in determining the Defect Amount.

                 (vii)    If a Defect affects only a portion of an Asset (as
                          contrasted with an undivided interest in the entirety
                          of such Asset) and a portion of the Purchase Price
                          has not been allocated specifically to such portion
                          of that Asset as provided in Article 3.06 hereof,
                          then for purposes of computing the Defect Amount, the
                          Allocated Value of such Asset shall be further
                          allocated among the portions of such Asset in a fair
                          and reasonable manner.

                 (viii)   If the Defect is a Plugging Liability, the Defect
                          Amount shall be Seller's pro rata share of the
                          necessary and reasonable expenses to  plug and
                          abandon the Well in accordance with all applicable
                          rules and regulations, net of Seller's pro rata share
                          of all salvage value of equipment and other materials
                          recovered from the Well.

                 Except with respect to (viii) above, notwithstanding anything
                 herein to the contrary, the aggregate Defect Amounts
                 attributable to Defects relating to an Asset for which Buyer
                 receives an adjustment in the Purchase Price shall never
                 exceed the Allocated Value of that Asset.

         (e)     CURE OF DEFECTS.  If Seller elects to cure a Defect in
                 accordance with Article 5.02(c) hereof, then Seller shall use
                 reasonable efforts to cure such Defect during the Cure Period.
                 On or before expiration of the Cure Period, Seller shall give
                 Buyer written evidence of any curative actions which, in
                 Seller's determination, cure or reduce the Defect Amount of a
                 Defect asserted by Buyer, including an explanation in
                 reasonable detail of any claimed





                                       22
   24
                 reduction in the Defect Amount.  On or before the expiration
                 of seven (7) days after the end of the Cure Period, Buyer
                 shall provide to Seller in writing a list of those Defects
                 asserted by Buyer which Seller claims to have cured pursuant
                 to this Article 5.02(e), and which Buyer determines have not
                 been cured, together with the revisions, if any, in Buyer's
                 estimates to the Defect Amounts attributable to such Defects
                 after giving effect, if any, to Seller's curative efforts.
                 For a period of seven (7) days after Seller's receipt of
                 Buyer's written list of such uncured Defects and revised
                 Defect Amounts, Seller and Buyer shall attempt to resolve
                 disputes as to such items.  During the Cure Period and
                 thereafter until all disputes regarding such Title Defect and
                 the Defect Amount in respect thereof have been fully resolved
                 by agreement or arbitration, Buyer shall afford Seller and its
                 representatives and agents access at all reasonable times to
                 files, Records and documents formerly in Seller's possession
                 or in the possession of Petroleum Financial, Inc. relating to
                 title to the one or more Assets that are the subject of such
                 disputed Defect or Defect Amount.  Such access shall be
                 subject to confidentiality restrictions reasonably imposed by
                 Buyer.

         (f)     EXPERT DETERMINATION.  In the event that the Parties are
                 unable to resolve all disputes as to the existence of Defects
                 or Defect Amounts within the later of fifteen (15) days after
                 the expiration of the Examination Period or fifteen (15) days
                 after the expiration of the last Cure Period, as applicable,
                 then all remaining disputes regarding Defects and/or Defect
                 Amounts shall be referred to a panel of three experts for
                 determination (the "Experts").  Seller and Buyer shall each
                 select one of the Experts who in turn shall select the third
                 Expert.  All three (3) Experts shall be selected by no later
                 than fifteen (15) days after the end of the period described
                 above in the Article 5.02(f).  Any and all such experts so
                 selected by the Parties shall have appropriate experience in
                 and knowledge of oil and gas title and/or other matters
                 relevant to the determination of the dispute.  The Experts may
                 retain such other experts to assist them in rendering their
                 decision as they may deem necessary or appropriate.  The
                 Parties shall submit all relevant information available to the
                 Experts within fifteen (15) business days after the date of
                 referral and may submit position papers on the subject to the
                 Experts within such period, but not thereafter.  The Experts
                 shall render their decision to the Parties in writing within
                 thirty (30) days after the date of referral.  The
                 determination and award, if any, of the Experts shall be final
                 and binding upon the Parties, and judgment may be entered
                 thereon in any court of competent jurisdiction upon the
                 application of either Party.  Seller and Buyer agree to share
                 equally the costs and expenses associated with such expert
                 determination  proceedings.

         (g)     ADJUSTMENT FOR UNCURED DEFECTS.  Subject to the deductible
                 provided for in Article 5.02(h) hereof, the Preliminary
                 Purchase Price shall be reduced





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                 by the amount, if any, of the Defect Adjustment at the times
                 and in the manner hereinafter provided:

                 (i)      With respect to any and all Defects and  Defect
                          Amounts attributable thereto which have been finally
                          resolved, whether by agreement or as determined by
                          the Experts, on or prior to the date of the issuance
                          of the Tranche B Shares, the Preliminary Purchase
                          Price shall be reduced by the aggregate of all said
                          Defect Amounts by decreasing the number of Tranche B
                          Shares to be issued by the appropriate Share
                          Adjustment Factor;

                 (ii)     In the event there exists on the date of the issuance
                          of the Tranche B Shares one or more Defects (or
                          Environmental Defects pursuant to Article 6.02(f)
                          hereof) and Defect Amounts attributable thereto which
                          have not been finally resolved at said time, Buyer
                          shall withhold from the Tranche B Shares to be issued
                          to Seller a number of Shares equal to the aggregate
                          of all such Defect Amounts, as asserted by Buyer (but
                          subject to the limitation hereinafter set forth)
                          divided by the Average Closing Price (the "Tranche B
                          Holdback").  All Tranche B Shares including Tranche B
                          Holdback Shares, shall be registered in accordance
                          with the Registration Rights Agreement.  In no event
                          shall the aggregate of all such Defect Amounts used
                          to calculate the Tranche B Holdback exceed the sum of
                          Five Hundred Thousand Dollars ($500,000).
                          Thereafter, when and as each said Defect,
                          Environmental Defect and/or the Defect Amount
                          attributable thereto is finally resolved by agreement
                          between the Parties, by the Experts or the
                          Environmental Experts, as applicable, the Preliminary
                          Purchase Price shall be  reduced, if appropriate, by
                          decreasing the number of Shares to be issued to
                          Seller from the Tranche B Holdback by the appropriate
                          Share Adjustment Factor and releasing to Seller the
                          remainder of the Shares held back as part of the
                          Tranche B Holdback with respect to said Defect or
                          Environmental Defect.  All said Defects and
                          Environmental Defects which are unresolved on the
                          date of the issuance of the Tranche B Shares shall be
                          fully and finally resolved on or before the date one
                          year after the Closing Date and all Tranche B
                          Holdback Shares shall either have been released to
                          Seller or used to reduce the Preliminary Purchase
                          Price as provided for in this Article 5.02(g)(ii).

                 (iii)    Seller shall place in an interest bearing joint
                          control account to be established at Texas Commerce
                          Bank, N.A. and styled "Harken/EnerVest Escrow Fund"
                          (the "Escrow Account"), out of the net proceeds from
                          the sale of Tranche B Shares when and as sold, One
                          Million Dollars ($1,000,000) (the "Escrow Amount").
                          On the





                                       24
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                          date one (1) year after the Closing Date, (1) Buyer
                          shall be entitled to receive from the Escrow Account
                          a sum equal to the aggregate amount of (i) the Defect
                          Adjustment and  the Environmental Defect Adjustment
                          less that portion of said amounts by which the
                          Preliminary Purchase Price has been reduced at the
                          time of the issuance of the Tranche B Shares and in
                          connection with the final resolution of the Tranche B
                          Holdback Shares, (ii) claims of third parties against
                          the Seller which are not related to the Assets and
                          which Buyer has not otherwise assumed under this
                          Agreement but for which Buyer has been judicially
                          determined liable by reason of the "de facto merger
                          doctrine" or similar legal theory or any relevant
                          statute, rule or regulation and (iii) any amounts
                          owing pursuant to Articles 9(a)-(e) and Article
                          9(h)by Seller to Buyer and not previously paid by
                          Seller or credited to Buyer, plus all interest
                          accrued thereon or attributable to said aggregate
                          sum.  Seller shall be entitled to receive the
                          balance, if any, of the Escrow Amount after said
                          payment to Buyer plus all interest accrued thereon or
                          attributable thereto.

                 (h)      DEDUCTIBLE FOR DEFECTS.  The Preliminary Purchase
                          Price and the Purchase Price shall be reduced for
                          Defects pursuant to Article 5.02(g) hereof if, and
                          only to the extent that, the cumulative aggregate of
                          all Defect Amounts exceeds the sum of $100,000.

                                   ARTICLE 6
                                 ENVIRONMENTAL

         6.01    Availability of Data to Buyer; Phase I Environmental Audit.
Prior to the date hereof, Seller has made available to Buyer information which
is in the possession or control of Seller or to which Seller has access (other
than publicly available information to which Buyer has equal access) and which
relates to the environmental condition of the Assets, which information
includes, without limitation, information regarding crude oil and produced
water that may have been spilled or disposed of on-site and the locations
thereof; onsite pits and pit closures; on-site burial; land farming; land
spreading; underground injection; and on-site solid waste disposal sites.
Buyer has also had the right, prior to the Closing Date, at its own risk and
expense, to conduct or have conducted a Phase I Environmental Audit of the
Assets.  To enable Buyer to conduct the Phase I Environmental Audit, Seller has
provided Buyer (and its representatives) with reasonable access to the Assets,
subject to any third party restrictions on Seller with respect to access to the
Assets, to Seller's books, records, and files relating to the Assets, and to
current employees of Seller.  Buyer shall provide Seller with copies of any
Phase I Environmental Audit report, whether completed prior to or after the
Closing Date, not less than five (5) days after Buyer's receipt of same, Buyer
agrees to release, indemnify, defend, and hold the Seller harmless from any
fines, penalties or damage to persons or property caused by the activities of
Buyer or its representatives, agents, consultants,





                                       25
   27
contractors or subcontractors in conducting a Phase I Environmental Audit;
provided, however, that the foregoing indemnity shall not extend to fines,
penalties or damages to persons or property that relate to matters discovered
by Buyer in conducting the Phase I Environmental Audit.

         6.02    Environmental Matters.

         (a)     ENVIRONMENTAL REPRESENTATION.   Seller hereby represents and
                 warrants to Buyer, for the sole and limited purpose of
                 determining the existence of Environmental Defects and
                 appropriate adjustments to the Preliminary Purchase Price, if
                 any, with respect thereto, as provided in this Article 6.02,
                 the following:

                 Except as listed in Schedule 6.02 attached hereto and
                 made a part hereof for all purposes, (i) the Seller is in
                 substantial compliance in all material respects with all
                 applicable Environmental Laws with respect to the Assets, and
                 (ii) the Seller has not received any inquiry or notice, other
                 than an inquiry or notice that has been fully and finally
                 resolved, nor does the Seller have any reason to believe it
                 will receive any inquiry or notice, that alleges that the
                 Seller is not now, or in the past has not been, in compliance
                 with all applicable Environmental Laws with respect to the
                 Assets.  Except as listed in Schedule 6.02 hereto, to the
                 Knowledge of Seller, the Seller has not released, as such term
                 is defined in CERCLA, Materials of Environmental Concern on,
                 in, or about the Assets other than as allowed by Environmental
                 Laws, none of the Assets is listed in the National Priority
                 List as a superfund site pursuant to CERCLA and relevant
                 regulations, and no conditions exist on, in, or about the
                 Assets as the result of Environmental Matters that give rise to
                 liabilities, potential liabilities or Third Party Claims under
                 Environmental Laws or common law.  Except as listed in Schedule
                 6.02 hereto, to the Knowledge of Seller, there are no
                 underground storage tanks on the Assets and the Seller has not
                 transported, disposed, or arranged for disposal, reclamation,
                 recycling, or sale of Materials of Environmental Concern from
                 the Assets to other properties, other than as allowed by
                 Environmental Laws, and to the Knowledge of Seller, the Seller
                 has not transported, disposed, stored offsite, or arranged for
                 disposal, reclamation, recycling, or sale of Materials of
                 Environmental Concern from the Assets that give rise to
                 liabilities, potential liabilities or Third Party Claims under
                 Environmental Laws or common law. Seller asserted no
                 Environmental Defects against its predecessor in title in
                 connection with its acquisition of the Assets.

         (b)     NOTICE OF ASSERTED ENVIRONMENTAL DEFECT.  Prior to the
                 expiration of the Examination Period, Buyer shall furnish to
                 Seller written notice specifying in reasonable detail each
                 Environmental Matter which, in Buyer's opinion,





                                       26
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                 constitutes a breach by Seller of Seller's representation set
                 forth above in Article 6.02(a) hereof (an "Environmental
                 Defect").  Such written notification ("Environmental Defect
                 Notice") shall contain a reasonable description of the facts
                 used by Buyer in making its determination that a breach exists
                 and Buyer's good faith estimate of the costs to remediate such
                 Environmental Matter and shall be sent to Seller by telecopy
                 or postage prepaid.  Any Environmental Defects not asserted on
                 or before the expiration of the Examination Period with
                 respect to the Assets, shall be deemed conclusively to be
                 waived by Buyer.  Failure by Buyer to identify all Assets (or
                 to identify all portions of an Asset) which are subject to a
                 particular Environmental Defect in an Environmental Defect
                 Notice shall not prevent Buyer from asserting such
                 Environmental Defect in separate or subsequent Environmental
                 Defect Notices, subject to otherwise timely asserting such
                 Environmental Defect prior to the expiration of the
                 Examination Period.

         (c)     NOTICE IN RESPONSE TO BUYER'S NOTICE.  On or before 5:00 p.m.
                 on the fifth (5th) business day following Seller's receipt of
                 an Environmental Defect Notice from Buyer, Seller shall give
                 written notice to Buyer for each Environmental Defect asserted
                 in an Environmental Defect Notice ("Environmental Response
                 Notice") as to whether it (a) disagrees with Buyer's assertion
                 that the Environmental Defect exists, (b) disagrees with the
                 Defect Amount estimated by Buyer for such Environmental
                 Defect, or (c) takes any combination of the foregoing
                 positions.  If Seller disagrees with Buyer's assertion of the
                 existence of an Environmental Defect or the Defect Amount with
                 respect thereto, Seller's Environmental Response Notice shall
                 also specify in reasonable detail Seller's grounds for such
                 disagreement, the Defect Amount estimated by Seller therefor,
                 or both, as the case may be.  Seller's failure to include in
                 its Environmental Response Notice an Environmental Defect
                 asserted in an Environmental Defect Notice shall be deemed to
                 be an admission of the existence of such Environmental Defect
                 and acceptance of Buyer's estimate of the Defect Amount with
                 respect thereto.

         (d)     METHOD OF DETERMINING DEFECT AMOUNTS FOR ENVIRONMENTAL
                 DEFECTS.  Without limiting Seller's right to dispute the
                 existence of an Environmental Defect, Defect Amounts for each
                 asserted Environmental Defect shall be determined by agreement
                 between the Parties giving due consideration to the multiple
                 goals of minimizing Environmental Liabilities (including the
                 selection of remedies which reflect customary industry
                 practices, are cost effective and consider all related
                 business and time requirements), avoiding Environmental
                 Liabilities and fully complying with all Environmental Laws.
                 If the Parties are unable to agree as to the Defect Amount for
                 any Environmental Defect, the Parties shall refer the matter
                 to the





                                       27
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                 Environmental Experts (as hereinafter defined) for
                 determination as provided in Article 6.02(e) hereof.

         (e)     ENVIRONMENTAL EXPERT DETERMINATION.  In the event that the
                 Parties are unable to resolve all disputes as to the existence
                 of Environmental Defects or Defect Amounts with respect
                 thereto within  fifteen (15) days after the expiration of the
                 Examination Period, then all remaining disputes regarding
                 Environmental Defects and/or Defect Amounts with respect
                 thereto shall be referred to a panel of three environmental
                 experts for determination (the "Environmental Experts").
                 Seller and Buyer shall each select one Environmental Expert
                 who in turn shall select the third Environmental Expert.  All
                 three (3) Experts shall be selected by no later than fifteen
                 (15) days after the end of the period previously described in
                 this Article 6.02(e).  Any and all such experts so selected by
                 the Parties shall have appropriate experience in and knowledge
                 of oil and gas environmental matters.  The Environmental
                 Experts may retain such other experts to assist them in
                 rendering their decision as they may deem necessary or
                 appropriate.  The Parties shall submit all relevant
                 information available to the Environmental Experts within
                 fifteen (15) business days after the date of referral and may
                 submit position papers on the subject to the Environmental
                 Experts within such period, but not thereafter.  The
                 Environmental Experts shall render their decision to the
                 Parties in writing within (30) days after the date of
                 referral.  The determination and award, if any, of the
                 Environmental Experts shall be final and binding upon the
                 Parties, and judgment may be entered thereon in any court of
                 competent jurisdiction upon the application of either Party.
                 Seller and Buyer agree to share equally the costs and expenses
                 associated with such expert determination  proceedings.

         (f)     ADJUSTMENT FOR ENVIRONMENTAL DEFECTS.  Subject to the
                 deductible provided for in Article 6.02(g) hereof, the
                 Preliminary Purchaser Price shall be reduced by the amount, if
                 any, of the Environmental Defect Adjustment, at the times and
                 in the manner hereinafter provided:

                 (i)      With respect to any and all Environmental Defects and
                          Defect Amounts attributable thereto which have been
                          finally resolved, whether by agreement or the
                          Environmental Experts, on or prior to the date of the
                          issuance of the Tranche B Shares, subject to the
                          deductible provided in Article 6.02(g) hereof, the
                          Preliminary Purchase Price shall be reduced by the
                          aggregate of all said Defect Amounts by decreasing
                          the number of Tranche B Shares to be issued by the
                          appropriate Share Adjustment Factor;

                 (ii)     In the event there exists on the date of the issuance
                          of the Tranche B Shares one or more Environments
                          Defects (or Defects pursuant





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   30
                          to Article 5.02 hereof) and Defect Amounts
                          attributable thereto which have not been finally
                          resolved at said time, Buyer shall withhold from the
                          Tranche B Shares the number of Shares provided in
                          Article 5.02(g)(ii) hereof.  All said Environmental
                          Defects shall be resolved and the Preliminary
                          Purchase Price adjusted therefore, if and to the
                          extent appropriate, and/or Tranche B Holdback Shares
                          released to Seller, if and to the extent appropriate,
                          in accordance with Article 5.02(g)(ii).

         (g)     LIMITATION ON SELLER'S LIABILITY.  Seller shall not be
                 required to pay any Defect Amount with respect to an
                 Environmental Defect until the Available Deductible Amount has
                 been reduced to, but not below, zero.  The Buyer shall not be
                 entitled to reduce the Preliminary Purchase Price for any such
                 Environmental Defects to the extent the same are actually
                 applied to reduce the Available Deductible Amount.  "Available
                 Deductible Amount" means $500,000 as reduced, but not below
                 zero, by the total amount of Defect Amounts attributable to
                 Environmental Defects incurred or paid by the Buyer.

         (h)     BUYER'S REMEDIAL ACTIONS.  With respect to any Environmental
                 Defect which is subject to the limitation set forth in Article
                 6.02(g) or for which the Preliminary Purchase Price is
                 adjusted pursuant to Article 6.02(f) hereof, and which
                 requires corrective, remedial, or other actions necessary to
                 respond to, remove, or otherwise address any conditions that
                 cause, contribute to, or are associated with such
                 Environmental Defect, Buyer will implement and complete or
                 cause to be implemented and completed all such corrective,
                 remedial, or other actions in a reasonable and professional
                 manner and will use its best efforts to do so in a timely and
                 cost-effective manner.

         (i)     BUYER'S SOLE REMEDY.  Buyer agrees that its sole remedy for
                 Environmental Defects that result from, arise out of, or are
                 attributable to the Assets will be pursuant to this Article 6,
                 and Buyer hereby releases, waives, and disclaims any and all
                 rights of contribution, indemnification, or other means of
                 recovery from Seller under Environmental Laws, including,
                 without limitation, CERCLA.

                                   ARTICLE 7
                          SURVIVAL AND INDEMNIFICATION

         7.01    Survival of Representations and Warranties.  The
representations and warranties of (i) the Seller contained in Article 4.01
hereof shall survive the Closing for a period of ninety (90) days from the
Closing Date and (ii) the Buyer contained in Article 4.02 hereof shall survive
the Closing indefinitely (the "Survival Period").





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         7.02    Indemnification Provision for the Benefit of the Seller.  In
the event the Buyer breaches any of its representations and warranties
contained in Article 4.02 hereof, then the Buyer agrees to indemnify and hold
harmless the Seller, any partner (general or limited) of Seller and any
current, former, and future director, officer, manager, member, partner,
shareholder, employee and agent of Seller and such partner, and any successor,
assign, heir, and executor of any of the foregoing (the "Indemnified Party"),
from and against the entirety of any Losses resulting from or related or
attributable to the breach which the Seller, or any such Affiliate (or any such
other indemnified person in such person's capacity set forth above) shall
suffer, provided such claim for indemnification is brought within the Survival
Period; and further provided that "Losses", as used in this sentence, shall not
include, and Buyer shall not be responsible or liable for, any death, personal
injury, or consequential damages in respect of such breach.

         7.03    Matters Involving Third Parties.

         (a)     If any third party shall notify an Indemnified Party with
                 respect to any matter which may give rise to a claim for
                 indemnification against Buyer (the "Indemnifying Party") under
                 this Article 7 or otherwise pursuant to this Agreement, then
                 the Indemnified Party shall promptly (and in any event within
                 ten (10) business days after receiving service of process in a
                 lawsuit, administrative proceeding or arbitration proceeding
                 with respect to the Third Party Claim) notify each
                 Indemnifying Party thereof in writing.  Each of the matters
                 described in this Article 7.03(a) shall be referred to in this
                 Agreement as a "Third Party Claim".

         (b)     Any Indemnifying Party will have the right to assume and
                 thereafter conduct the defense of the Third Party Claim with
                 counsel of its choice reasonably satisfactory to the
                 Indemnified Party; provided, however, that the Indemnifying
                 Party will not consent to the entry of any judgment or enter
                 into any settlement with respect to the Third Party Claim
                 without the prior written consent of the Indemnified Party
                 (not to be withheld unreasonably) unless the judgment or
                 proposed settlement involves only the payment of money damages
                 and does not impose an injunction or other equitable relief
                 upon (or constitute an admission of guilt, liability, fault or
                 responsibility for) the Indemnified Party.  The Indemnified
                 Party shall have the right to employ separate counsel in any
                 such action and to participate in the defense thereof, but the
                 fees and expenses of such counsel shall be at the expense of
                 the Indemnified Party unless (i) the employment thereof has
                 been specifically authorized in writing by the Indemnifying
                 Party or (ii) the Indemnifying Party failed to assume the
                 defense and employ counsel.

         (c)     Unless and until an Indemnifying Party assumes the defense of
                 the Third Party Claim as provided in Article 7.03(b) above,
                 however, the Indemnified Party may defend against the Third
                 Party Claim in any manner it reasonably





                                       30
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                 may deem appropriate with such reasonable costs and expenses
                 associated therewith to be borne for the account of the
                 Indemnifying Party.

         (d)     In no event will the Indemnified Party consent to the entry of
                 any judgment or enter into any settlement with respect to the
                 Third Party Claim without the prior written consent of the
                 Indemnifying Party (not to be withheld unreasonably), unless
                 the Indemnified Party waives indemnification with respect to
                 the Third Party Claim so settled and adjudicated.

         (e)     The indemnification obligations of Buyer under this Agreement
                 (including Articles 7 and 8 hereof shall include court costs
                 and attorney's fees and expenses and costs of investigating,
                 preparing or defending any action or proceeding with respect
                 to any Third Party Claim to the extent such Third Party Claim
                 may give rise to a claim for indemnification under such
                 indemnification obligations of Buyer, as the case may be.

         7.04    Effect of lndemnification Provisions.  The Seller acknowledges
and agrees that the foregoing indemnification provisions in this Article 7 and
in Article 8 shall, following the Closing hereof, be the exclusive remedy of
Seller for any breach of Buyer's representations and warranties in Article 4.02
hereof, provided that, the foregoing shall not limit the Buyer's obligations
for any breach of a covenant or agreement contained in any Article other than
Article 4. If a claim for payment of a liquidated amount covered by Buyer's
indemnification obligations under this Agreement is made in accordance with the
terms of this Agreement and is not paid within sixty (60) days after such claim
is received by Buyer, the liquidated amount of such claim shall bear interest
at the Agreed Rate from the date such claim was received until paid.

         7.05    Negligence, Etc.  IT IS EXPRESSLY AGREED THAT BUYER'S
INDEMNIFICATION OBLIGATIONS UNDER THIS ARTICLE 7,  ARTICLE 8 OR UNDER ANY OTHER
ARTICLE OF THIS AGREEMENT INCLUDE, WITHOUT LIMITATION, LOSSES AND ENVIRONMENTAL
LIABILITIES, IF ANY, BASED ON NEGLIGENCE, ALLEGED NEGLIGENCE, GROSS NEGLIGENCE
OR ALLEGED GROSS NEGLIGENCE OF SELLER, ANY PARTNER OF SELLER (GENERAL OR
LIMITED), AND ANY CURRENT, FORMER AND FUTURE DIRECTOR, OFFICER, MANAGER,
MEMBER, PARTNER, SHAREHOLDER, EMPLOYEE AND AGENT OF ANY SELLER OR ANY SUCH
PARTNER, AND ANY SUCCESSOR, ASSIGN, HEIR AND EXECUTOR OF ANY OF THE FOREGOING.

                                   ARTICLE 8
                             POST CLOSING COVENANTS

         8.01    Certain Obligations of Seller.  Seller agrees that, with
respect to the period following the Closing:





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         (a)     RECORDS.  On or before five (5) business days after Closing
                 (the "Records Delivery Date"), Seller shall deliver to Buyer,
                 at Buyer's offices in Dallas, Texas, all Records.  Seller
                 shall be entitled to retain, or to obtain from Buyer at
                 Seller's cost, one copy of all such information for its
                 records as may be reasonably necessary for Seller to address
                 matters relative to its ownership and operation of the Assets,
                 including, without limitation, the preparation of accounting
                 and financial information, the filing of tax returns and the
                 pursuing or defending of litigation.

         (b)     SUSPENSE FUNDS.  As soon as practicable after Closing, Seller
                 shall provide Buyer with a list showing all proceeds from
                 production attributable to the Assets which are currently held
                 in suspense and transfer to Buyer all such proceeds.  Buyer
                 shall be responsible for distribution of such proceeds to the
                 parties lawfully entitled thereto, and agrees to indemnify,
                 defend and hold harmless Seller from and against any and all
                 Losses arising out of or relating to such proceeds, except for
                 any Losses caused by Seller's negligence or willful
                 misconduct.

         (c)     OBTAINING FINANCIAL INFORMATION.  Seller agrees to use
                 reasonable efforts to assist Buyer in obtaining from Union
                 Pacific Oil and Gas Company relevant financial information
                 concerning the Assets for periods of time prior to the time
                 Seller acquired the Assets in connection with Buyer's
                 reporting requirements under applicable securities
                 regulations.

         (d)     CONTINUED EXISTENCE.  The Seller shall maintain its
                 partnership existence for a minimum period of one (1) year
                 following the Closing Date.

         (e)     RETAINED LIABILITIES.  Seller retains and shall remain liable
                 and responsible for, and Buyer specifically does not assume,
                 any liabilities and obligations of Seller not related to or
                 arising out of the ownership, use, maintenance and operation
                 of the Assets, whether known or unknown, accrued or contingent
                 and not otherwise specifically set forth in this Agreement.

         8.02    Certain Obligations of Buyer.  Each of Buyer agrees that, with
respect to the period following the Closing:

         (a)     RECORDING.  Within (30) days following Closing, Buyer shall
                 record those Conveyance Documents necessary to evidence in the
                 public record that Buyer has acquired the Assets and within a
                 reasonable time thereafter, Buyer shall supply Seller with a
                 true and accurate photocopy of the recorded and filed
                 Conveyance Documents.  In the event Buyer fails to record any
                 such Conveyance Document within such time period, Seller may,
                 but shall not be obligated to, record such Conveyance Document
                 on





                                       32
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                 Buyer's behalf and at Buyer's cost (for which Buyer shall
                 immediately reimburse Seller upon demand).

         (b)     REMOVAL OF NAMES.  As soon as reasonably practicable after
                 Closing, Buyer shall cause to be removed the names and marks
                 of Seller and any variations and derivations thereof and logos
                 relating thereto from any of the Assets, and will not
                 thereafter make any use whatsoever of such names, marks, and
                 logos; provided, however, that the Buyer shall have no
                 obligation to remove such names or marks from any lease site
                 or well until such time as such names or marks are removed in
                 the ordinary course of the Buyer's business.  Buyer shall
                 indemnify Seller for any Losses it suffers as a result of the
                 Buyer's non- removal of such names or marks after the Closing.

         (c)     GEOLOGIC AND GEOPHYSICAL INFORMATION.  Seller reserves the
                 right to use any and all geologic and geophysical information
                 transferred to Buyer hereunder and Buyer agrees to cooperate
                 with Seller in granting reasonable access to such information.

         (d)     RESPONSIBILITY FOR ASSUMED LIABILITIES.  FROM AND AFTER THE
                 CLOSING DATE, BUYER AGREES TO ASSUME AND TO INDEMNIFY AND HOLD
                 HARMLESS THE SELLER, ANY PARTNER OF SELLER (GENERAL OR
                 LIMITED), AND ANY CURRENT, FORMER AND FUTURE DIRECTOR,
                 OFFICER, MANAGER, MEMBER, PARTNER, SHAREHOLDER, EMPLOYEE AND
                 AGENT OF ANY SELLER OR ANY SUCH PARTNER, AND ANY SUCCESSOR,
                 ASSIGN, HEIR AND EXECUTOR OF ANY OF THE FOREGOING FROM AND
                 AGAINST THE ENTIRETY OF ANY LOSSES RESULTING FROM, ARISING OUT
                 OF, OR ATTRIBUTABLE TO THE ASSUMED LIABILITIES.

         (e)     MAINTENANCE OF LIEN PRIORITY.  Buyer shall keep the Assets
                 free and clear of all liens, mortgages, deeds of trust and
                 other encumbrances other than the Deed of Trust and the liens
                 and security interests created thereby and shall maintain the
                 first priority status of the Deed of Trust and the liens and
                 security interests created thereby.

         (f)     RESPONSIBILITY FOR LITIGATION AND CLAIMS.  From and after the
                 Closing Date, Buyer agrees to assume and to indemnify Seller,
                 any partner of Seller (general or limited) and any current,
                 former, and future director, officer, manager, member,
                 partner, shareholder, employee, and agent of Seller or any
                 such partner, and any successor, assign, heir and executor of
                 any of the foregoing, from and against the entirety of any
                 Losses resulting from arising out of, or attributable to the
                 Litigation and Claims.





                                       33
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         8.03    Certain Agreements Regarding the Issuance of Additional
Shares.

         (a)     TRANCHE B SHARES.  Harken Energy shall issue to Seller the
                 Tranche B Shares, as adjusted pursuant to Articles 5, 6 and
                 9(f) hereof, upon the expiration of the First Shelf Life (the
                 "Tranche A Expiration Point").

         (b)     DEFICIENCY SHARES.  If, as of the Tranche A Expiration Point,
                 Tranche A Realized Proceeds are less than $4,262,500, then,
                 within ten days after the Tranche A Expiration Point, Harken
                 Energy shall issue to Seller additional Shares in an amount
                 equal to A divided by B, where "A" is equal to the Tranche A
                 Deficiency Amount, and where "B" is equal to the Average
                 Closing Price.  The Shares issued pursuant to this Article
                 8.03(b) shall be herein called the "Deficiency Shares".

         (c)     TRANCHE C SHARES.  If, as of the expiration of the Second
                 Shelf Life (the "Tranche B Expiration Point"), the Aggregate
                 Tranche A/B Realized Proceeds are less than $10,200,000 (as
                 reduced or increased, as appropriate, by the net aggregate
                 amount of the Defect Adjustment, the Environmental Defect
                 Adjustment and the value of the Imbalances), then, within ten
                 days after the Tranche B Expiration Point, Harken Energy shall
                 issue to Seller additional Shares in an amount equal to A
                 divided by B, where "A" is equal to the Aggregate Tranche A/B
                 Deficiency Amount, and where "B" is equal to the Average
                 Closing Price.

         (d)     As used in this Agreement:

                          "Aggregate Proceeds" means the sum of A plus B plus
                 C, where "A" is equal to the aggregate gross proceeds actually
                 received by Seller (prior to any commissions, fees or other
                 costs), from the sale of Tranche A Shares, Deficiency Shares,
                 Tranche B Shares and Tranche C Shares, as applicable, where
                 "B" is equal to the aggregate gross proceeds Seller could have
                 received (prior to any commissions, fees or other costs) from
                 a Qualified Offer from a Qualified Purchaser for the sale of
                 Tranche A Shares, Deficiency Shares, Tranche B Shares and
                 Tranche C Shares, as applicable, and where "C" is equal to the
                 product obtained by multiplying (i) the remainder obtained by
                 subtracting the number of Tranche A Shares, Deficiency Shares,
                 Tranche B Shares and Tranche C Shares which could have been
                 sold by Seller pursuant to a Qualified Offer from a Qualified
                 Purchaser from the aggregate number of unsold Tranche A
                 Shares, Deficiency Shares, Tranche B Shares and Tranche C
                 Shares, as applicable, in Seller's possession by (ii) the
                 Average Closing Price.





                                       34
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                          "Aggregate Tranche A/B Deficiency Amount" shall mean
                 A minus B, where "A" is $10,200,000 (as reduced or increased,
                 as appropriate, by the net aggregate amount of the Defect
                 Adjustment, the Environmental Defect Adjustment and the value
                 of the Imbalances), and where "B" is the Aggregate Tranche A/B
                 Realized Proceeds.

                          "Aggregate Tranche A/B Realized Proceeds" shall mean
                 the sum of A plus B plus C, where "A" is equal to the
                 aggregate gross proceeds actually received by Seller (prior to
                 any commissions, fees or other costs), from the sale of
                 Tranche A Shares, Deficiency Shares and Tranche B Shares,
                 where "B" is equal to the aggregate gross proceeds Seller
                 could have received (prior to any commissions, fees or other
                 costs) from a Qualified Offer from a Qualified Purchaser for
                 the sale of Tranche A Shares, Deficiency Shares and Tranche B
                 Shares, and where "C" is equal to the  product obtained by
                 multiplying (i) the remainder obtained by subtracting the
                 number of Tranche A Shares, Deficiency Shares and Tranche B
                 Shares which could have been sold by Seller pursuant to a
                 Qualified Offer from a Qualified Purchaser from the aggregate
                 number of unsold Tranche A Shares, Deficiency Shares and
                 Tranche B Shares in Seller's possession by (ii) the Average
                 Closing Price.

                          "Aggregate Tranche A/B/C Realized Proceeds" shall
                 mean the sum of A plus B plus C, where "A" is equal to the
                 aggregate gross proceeds actually received by Seller (prior to
                 any commissions, fees or other costs), from the sale of
                 Tranche A Shares, Deficiency Shares, Tranche B Shares and
                 Tranche C Shares, where "B" is equal to the aggregate gross
                 proceeds Seller could have received (prior to any commissions,
                 fees or other costs) from a Qualified Offer from a Qualified
                 Purchaser for the sale of Tranche A Shares, Deficiency Shares,
                 Tranche B Shares and Tranche C Shares, and where "C" is equal
                 to the  product obtained by multiplying (i) the remainder
                 obtained by subtracting the number of Tranche A Shares,
                 Deficiency Shares, Tranche B Shares and Tranche C Shares which
                 could have been sold by Seller pursuant to a Qualified Offer
                 from a Qualified Purchaser from the aggregate number of unsold
                 Tranche A Shares, Deficiency Shares, Tranche B Shares and
                 Tranche C Shares in Seller's possession by (ii) the Average
                 Closing Price.

                          "Average Closing Price" shall mean (i) when used in
                 Articles 5.02(g)(ii), 8.03(b) and in the definitions of
                 Tranche A Realized Proceeds and Share Adjustment Factor, the
                 average of the last reported Sales Price for the Shares for
                 the 30 consecutive calendar days immediately preceding the
                 Tranche A Expiration Point, (ii) when used in Article 8.03(c)
                 and in the definitions of Aggregate Tranche A/B Realized
                 Proceeds the average of the last reported Sales Price for the
                 Shares for the 30 consecutive calendar





                                       35
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                 days immediately preceding the Tranche B Expiration Point,
                 (iii) when used in the definition of Aggregate Proceeds, the
                 average of the last reported Sales Price for the Shares for
                 the 30 consecutive calendar days immediately preceding the
                 date of Buyer's request for a partial release or final
                 release, as applicable; and (iv) when used in Article 3.03(c)
                 and the definition of Aggregate Tranche A/B/C Realized
                 Proceeds, the average of the last reported Sales Price for the
                 Shares for the 30 consecutive calendar days immediately
                 preceding the Foreclosure Trigger Date.

                          "Deficiency Shares" shall have the meaning assigned
                 to such term in Article 8.03(b).

                          "First Shelf Life" shall have the meaning assigned to
                 such term in the Registration Rights Agreement.

                          "Qualified Offer" shall mean an offer to purchase
                 Tranche A Shares, Deficiency Shares, Tranche B Shares, or
                 Tranche C Shares, as applicable, at a price not less than
                 $2.75 per share (which price per share shall be
                 proportionately adjusted in the event of any subdivision or
                 combination of the Shares).

                          "Qualified Purchaser" shall mean a person that, in
                 the good faith determination of Seller, is financially able to
                 purchase the Shares that is the subject of the Qualified Offer
                 made by such person.

                          "Sales Price" shall mean, when used with respect to a
                 calendar day, (i) the last reported sales price of the Shares
                 on such day on the exchange where the Shares are primarily
                 traded, (ii) if the Shares are not traded on an exchange, the
                 last reported sale price of the Shares on such day on the
                 NASDAQ National Market System, or (iii) if the Shares are not
                 reported on the NASDAQ National Market System, the closing bid
                 price for the Shares last quoted on such day as reported by an
                 established quotation service for over-the-counter securities.

                          "Second Shelf Life" shall have the meaning assigned
                 to such term in the Registration Rights Agreement.

                          "Tranche A Deficiency Amount" shall mean A minus B,
                 where "A" is $4,262,500, and where "B" is the Tranche A
                 Realized Proceeds.

                          "Tranche A Expiration Point" shall have the meaning
                 assigned to it in Article 8.03(a).





                                       36
   38
                          "Tranche A Realized Proceeds" shall mean the sum of A
                 plus B plus C, where "A" is equal to the aggregate gross
                 proceeds actually received by Seller (prior to any
                 commissions, fees or other costs), from the sale of Tranche A
                 Shares, and where "B" is equal to the aggregate gross proceeds
                 Seller could have received (prior to any commissions, fees or
                 other costs) from a Qualified Offer from a Qualified Purchaser
                 for the sale of Tranche A Shares, and where "C" is equal to
                 the  product obtained by multiplying (i) the remainder
                 obtained by subtracting the number of Tranche A Shares which
                 could have been sold by Seller pursuant to a Qualified Offer
                 from a Qualified Purchaser from the aggregate number of unsold
                 Tranche A Shares in Seller's possession by (ii) the Average
                 Closing Price.

                          "Tranche B Expiration Point" shall have the meaning
                 assigned to it in Article 8.03(c).

         (e)     SHARE CEILING.  If at any time from and after Closing, Buyer
                 is required, pursuant to this Agreement, to issue an amount of
                 Shares, which, when aggregated with the amount of Shares
                 previously issued hereunder, equals or exceeds 5,100,000
                 Shares, Buyer shall have the option, in its discretion, to (i)
                 issue the additional Shares in accordance with the other terms
                 and provisions hereof or (ii) terminate its obligations to
                 issue such Shares and any other Shares required hereunder by
                 making a cash payment (the "Buyout Payment") to Seller in an
                 amount equal to the difference between $15,200,000 (as reduced
                 or increased, as appropriate, by the net aggregate amount of
                 the Defect Adjustment, the Environmental Defect Adjustment and
                 the value of the Imbalances) and the aggregate gross cash
                 proceeds previously received by Seller pursuant hereto
                 including the Cash Consideration and the proceeds from all
                 sales of Shares (to include broker's fees and other expenses
                 associated with the sale of the Shares) received by Seller
                 pursuant hereto.  In the event Buyer elects to make the Buyout
                 Payment, such payment shall be made no later than the date on
                 which the Shares which would have been issued but for the
                 Buyout Payment were required to be registered.
                 Contemporaneously with said payment, Seller shall reconvey to
                 Buyer all Shares (other than the Warrants and the Shares
                 underlying the Warrants) acquired by Seller pursuant hereto
                 and not previously sold by Seller.  After receipt of the
                 Buyout Payment, Seller shall have no further rights to receive
                 Shares hereunder other than the Shares to be issued in respect
                 of the Warrants.  Nothing contained in Article 8.03 hereof is
                 intended or shall be construed as terminating, limiting or
                 otherwise adversely impacting Seller's rights with respect to
                 the Warrants or the Shares to be issued in respect thereof.





                                       37
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                                   ARTICLE 9
                               EFFECT OF CLOSING

         The following terms, provisions and prorations shall be effective at
the Closing:

         (a)     REVENUES.   All proceeds from production, accounts
                 receivables, notes receivable, income, revenues, monies and
                 other items attributable to the Assets with respect to any
                 period of time prior to the Effective Date shall belong to and
                 be retained by or paid over to Seller and all necessary
                 reports with respect to such proceeds shall be filed by
                 Seller.  All proceeds from production, accounts receivables,
                 notes receivables, income, revenues, monies and other items
                 attributable to the Assets with respect to any period of time
                 from and after the Effective Date shall belong to and be
                 retained by or paid over to Buyer, except for Hydrocarbons
                 that, at the Effective Date, are attributable to the Assets
                 and are in storage or are otherwise held in inventory and all
                 proceeds attributable thereto.

         (b)     EXPENSES.  All accounts payable and accrued liabilities for
                 costs and expenses attributable to the Assets with respect to
                 any period of time prior to the Effective Date, including
                 excise, severance, and similar taxes based on production or
                 royalties, shall be the obligation of and paid by the Seller,
                 and all necessary reports with respect to such costs and
                 expenses shall be filed by Seller.  All accounts payable and
                 accrued liabilities for direct costs and expenses attributable
                 to the Assets (but not including Seller's overhead costs) with
                 respect to any period of time from and after the Effective
                 Date shall be the obligation of and be paid by the Buyer.

         (c)     AD VALOREM AND PROPERTY TAXES.  All ad valorem taxes, real
                 property taxes, personal property taxes and similar
                 obligations (the "Taxes") shall be apportioned as of the
                 Effective Date between Buyer and Seller.  All such Taxes
                 allocable to periods prior to the Effective Date shall be paid
                 by Seller, and all such Taxes allocable to the Effective Date
                 and after shall be paid by Buyer.  Any refunds of Taxes
                 allocable to periods prior to the Effective Date shall be the
                 property of Seller.  Any refunds of Taxes allocable to periods
                 after the Effective Date shall be the property of Buyer.
                 Buyer shall file or cause to be filed all required reports and
                 returns incident to such Taxes which are due on or after the
                 Effective Date, and shall pay or cause to be paid to the
                 taxing authorities all such Taxes reflected on such reports
                 and returns; provided, however, Seller shall promptly
                 reimburse Buyer for any amounts owing by Seller with respect
                 thereto pursuant to this paragraph.

         (d)     SALES TAXES, FILING FEES, ETC.  The Preliminary Purchase Price
                 shall be net of any sales taxes or other transfer taxes, and
                 Buyer shall be liable for any such tax, as well as any
                 applicable conveyance, transfer and recording





                                       38
   40
                 fees, and real estate, transfer, stamp or other taxes imposed
                 upon the sale of the Assets.  Seller agrees to use its
                 reasonable best efforts to assist Buyer in obtaining any
                 applicable exemptions to any applicable state sales tax.  If
                 Seller is required by applicable state law to report and pay
                 these taxes or fees, Buyer shall promptly deliver a check to
                 Seller in full payment, and Seller shall deliver said check to
                 the appropriate taxing authorities and shall bear any and all
                 penalties, costs and expenses associated with the failure of
                 Seller to deliver said check.

         (e)     OTHER TAXES.  All production, severance or excise taxes,
                 conservation fees and other similar such taxes or fees (other
                 than income taxes) relating to production attributable to the
                 Assets prior to the Effective Date shall be paid by Seller and
                 all such taxes and fees relating to such production
                 attributable to the Assets on and after the Effective Date
                 shall be paid by Buyer.

         (f)     GAS IMBALANCES.  Buyer has not included in its engineering
                 pertaining to the Assets the effect of any Imbalances (as
                 hereinafter defined) with respect to shares of production
                 taken or marketed from or attributable to working interests
                 comprising the Assets.  Attached hereto as Exhibit 9(f) and
                 made a part hereof for all purposes is a listing of all
                 Imbalances (including working interest imbalances and pipeline
                 imbalances) affecting the Assets as of the Effective Date.
                 The Preliminary Purchase Price shall be adjusted as
                 hereinafter provided to reflect such Imbalances.  If either
                 party determines within ninety (90) days after Closing that
                 gas volume Imbalances exist relative to working interests or
                 with respect to pipelines, subject to verification and cure of
                 the other Party in accordance with the provisions of Article
                 5.02(e) hereof, the Preliminary Purchase Price shall be
                 adjusted upward or downward, depending upon whether there is a
                 net overproduction or a net underproduction attributable to
                 the Assets.  The amount to be paid by Buyer to Seller with
                 respect to any underproduction, or by Seller to Buyer with
                 respect to any overproduction, shall be the present value of
                 the net cash flow attributable to all such volumes of gas
                 recoverable without cash balancing as determined by Ryder
                 Scott Company or another petroleum engineer mutually agreed
                 upon by both Parties (the "Evaluation Engineer") using (i) an
                 agreed upon pricing index, (ii) an annual discount rate of ten
                 percent (10%), and (iii) the maximum rate of recovery
                 permitted under the applicable gas balancing agreements.  Upon
                 the final determination of the quantity of overproduction
                 and/or underproduction attributable to a Well as of the
                 Effective Date, the parties will submit all relevant
                 information to the Evaluation Engineer for valuation as
                 described above.  The adjustment to the Preliminary Purchase
                 Price shall be made in accordance with the provisions of
                 Article 5.02(g) hereof by increasing or decreasing, as
                 appropriate, the number of Tranche B Shares by the appropriate
                 Share Adjustment Factor. Pursuant to that certain Asset





                                       39
   41
                 Purchase and Sale Agreement dated January 18, 1995, but
                 effective as of August 1, 1994, between Union Pacific Oil and
                 Gas Company ("UPOGC"), as seller, and EnerVest Management
                 Company, L.C. ("EnerVest"), as buyer (the "UPOGC Agreement"),
                 Seller, as assignee of EnerVest, is entitled to
                 indemnification from UPOGC with respect to certain Imbalances
                 affecting the Assets.  Seller hereby retains the right to seek
                 indemnification against UPOGC under the UPOGC Agreement with
                 respect to any Imbalances for which the Preliminary Purchase
                 Price is adjusted downward pursuant to this Article 9(f).  For
                 purposes of this Agreement, "Imbalances" shall mean any
                 situation in which any party entitled, including Seller, to
                 produce gas from a Well in which Seller owns a working
                 interest has produced such gas in excess of its pro rata share
                 and thereby has incurred a future liability or makeup
                 obligation.

         (g)     PAYMENTS; SHARED OBLIGATIONS.  If amounts are received by
                 either Party hereto which, under the terms of this Article 9
                 belong to the other Party, such amount shall immediately be
                 paid over to the proper Party.  If an invoice or other
                 evidence of an obligation is received which under the terms of
                 this Article 9 is partially the obligation of Seller and
                 partially the obligation of Buyer, then the Parties shall
                 consult each other and each shall promptly pay its portion of
                 such obligation to the obligee.

         (h)     POST-CLOSING ADJUSTMENTS.  Within ninety (90) days after
                 Closing, Seller shall prepare and deliver to Buyer, in
                 accordance with this Agreement and generally accepted
                 accounting principles, a statement (herein called the "Final
                 Settlement Statement"), setting forth each adjustment or
                 payment that was not finally determined as of the Closing or
                 in accordance with Articles 9(a)-(e) and 9(g), above, and
                 showing the calculation of such adjustments.  As soon as
                 practicable after receipt of the Final Settlement Statement,
                 Buyer shall deliver to Seller a written report containing any
                 changes that Buyer proposes be made to the Final Settlement
                 Statement.  The Parties shall undertake to agree with respect
                 to the amounts due pursuant to such post-Closing adjustment no
                 later than thirty (30) days after Buyer's receipt of the Final
                 Settlement Statement.  The date upon which such agreement is
                 reached shall be herein called the "Final Settlement Date." In
                 the event, as a result of the Final Settlement Statement (i)
                 Buyer owes Seller additional monies, Buyer shall pay Seller or
                 to Seller's account (as designated by Seller) in immediately
                 available federal funds such amount; or (ii) Seller owes Buyer
                 monies, Seller shall pay Buyer or to Buyer's account (as
                 designated by Buyer) in immediately available federal funds
                 such amount.  Payment by Buyer or Seller shall be made within
                 five (5) days after the Final Settlement Date.





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                                   ARTICLE 10
                           CONFIDENTIALITY AGREEMENT

         Each Party, its Affiliates and its and their directors, officers,
employees, agents, representatives, consultants, investors and lenders, agree
to keep the terms and conditions of this Agreement and all proprietary and
confidential information exchanged between Buyer and Seller in connection with
this Agreement, confidential, and to not disclose the existence of this
Agreement without the prior written consent of the other Party, which consent
may be withheld at either Party's sole discretion, for a period not to exceed
one year from the Closing Date.  The foregoing restriction shall not apply to
disclosures and information which (i) are required to comply with applicable
statutes and regulations; (ii) are required to enforce this Agreement;(iii) are
required to obtain financing related to the transactions contemplated hereby;
(iv) enter the public domain through a third party who does not thereby breach
an obligation of confidentiality; or (v) are made in association with press
releases issued in accordance with Article 14.01 hereof.

                                   ARTICLE 11
                                    CLOSING

         11.01   Seller's Closing Obligations.  At Closing, Seller shall
deliver or cause to be delivered to Buyer the following:

         (a)     CONVEYANCE DOCUMENTS.  The Conveyance Documents;

         (b)     OPINION OF COUNSEL.  An opinion of counsel to the Seller
                 substantially in the form of Exhibit "11.01(b)" attached
                 hereto and made a part hereof for all purposes; and

         (c)     REGISTRATION RIGHTS AGREEMENT.  The Registration Rights
                 Agreement  dated the Closing Date, substantially in the form
                 of Exhibit 11.01(c) in all material respects (the
                 "Registration Rights Agreement").

         11.02   Buyer's Closing Obligations.  At Closing, Buyer shall tender
to Seller the Cash Consideration by wire transfer in immediately available
funds and shall deliver to Seller at Closing with respect to items (a), (c),
(d) and (e) listed below and within thirty (30) days after Closing with respect
to item (b) hereinbelow the following:

         (a)     OPINION OF COUNSEL.  The opinion of counsel to the Buyer
                 substantially in the form of Exhibit "11.02(a)" attached
                 hereto and made a part hereof for all purposes;

         (b)     SHARES.  A certificate or certificates in definitive form
                 representing the Shares to be issued pursuant to Article
                 3.01(b);





                                       41
   43
         (c)     WARRANTS.  The Warrants;

         (d)     DEED OF TRUST.  The Deed of Trust described in Article 3.03(a)
                 hereof; and

         (e)     REGISTRATION RIGHTS AGREEMENT.  The Registration Rights
                 Agreement  substantially in the form of Exhibit 11.01(c) in
                 all material respects;

                                   ARTICLE 12
                         CASUALTY LOSS AND CONDEMNATION

         If, prior to the Closing Date, all or any portion of the Assets are
destroyed by fire or other casualty or are taken in condemnation or under right
of eminent domain or proceedings for such purpose are pending or threatened in
writing, Buyer may elect (i) to treat such destruction, taking or pending or
threatened taking as a Defect pursuant to Article 5 hereof, in which case
Seller shall retain any amounts that have been or will be paid to it by third
parties (including insurers) by reason of such destruction or taking; or (ii)
to purchase such Assets or portions thereof notwithstanding any such
destruction, taking or pending or threatened taking (without reduction in the
Preliminary Purchase Price with respect thereto), in which case Seller shall,
at the Closing, pay to Buyer all sums paid to Seller by third parties
(including insurers) by reason of the destruction or taking of such Assets, and
shall assign, transfer and set over unto Buyer all of Seller's right, title and
interest in and to any unpaid awards or other amounts due from third parties
(including insurers) arising out of the destruction, taking or pending or
threatened taking of such Assets or portions thereof.  Prior to Closing, Seller
shall not voluntarily compromise, settle or adjust any amounts payable by
reason of any destruction, taking or pending or threatened taking as to the
Assets or portions thereof without first obtaining the written consent of
Buyer.

                                   ARTICLE 13
                             GOVERNMENTAL CONSENTS

         At the Closing, Seller shall execute and deliver to Buyer such
assignments of federal, state and Indian leases as require consent to
assignment, on the forms required by the governmental or tribal agency having
jurisdiction thereof.  Buyer shall promptly file for and obtain the necessary
approvals for such assignments.  Until such approvals are obtained, Seller
shall continue to hold governmental title to such leases as nominee for Buyer.

                                   ARTICLE 14
                                 MISCELLANEOUS

         14.01   Press Releases and Public Announcements.  Neither Party shall
issue any press release or make any public announcement relating to the subject
matter of this Agreement prior to the Closing without the prior approval of the
other Party, which





                                       42
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approval shall not be unreasonably withheld; provided, however, that either
Party may make any public disclosure it believes in good faith is required by
applicable law or any listing or trading agreement concerning its publicly
traded securities (in which case the disclosing Party will use its reasonable
best efforts to advise the other Party prior to making the disclosure).

         14.02   Entire Agreement.  This Agreement (including the documents
referred to herein) constitutes the entire agreement between the Parties and
supersedes any prior agreements, or representations by or between the Parties,
written or oral, to the extent they have related in any way to the subject
matter hereof.

         14.03   Succession and Assignment.  This Agreement shall be binding
upon and inure to the benefit of the Parties and their respective successors
and permitted assigns.  Neither Party may assign either this Agreement or any
of its rights, interests, or obligations hereunder without the prior written
approval of the other Party, which approval shall not be unreasonably withheld.

         14.04   Counterparts.  This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original but all of which
together will constitute one and the same instrument.

         14.05   Headings.  The section headings contained in this Agreement
are inserted for convenience only and shall not affect in any way the meaning
or interpretation of this Agreement.

         14.06   Governing Law.  This Agreement shall be governed by and
construed in accordance with the domestic laws of the State of Texas without
giving effect to any choice or conflict of law provision or rule (whether of
the State of Texas or any other jurisdiction) that would cause the application
of the laws of any jurisdiction other than the State of Texas.

         14.07   Legal Fees.  The prevailing party in any legal proceeding
brought under or to enforce this Agreement shall be additionally entitled to
recover court costs and reasonable attorney's's fees from the nonprevailing
party.  Each Party shall pay their respective legal costs associated with the
negotiation and drafting of this Agreement.

         14.08   Exhibits.  All exhibits and schedules hereto which are
referred to herein are hereby made a part hereof and incorporated herein by
such reference.

         14.09   Waiver.  Any of the terms, provisions, covenants,
representations, warranties or conditions hereof may be waived only by written
instrument executed by the Party waiving the compliance.  The failure of either
Party at any time or times to require performance of any provisions hereof
shall in no manner affect such Party's right to enforce the same.  No waiver by
either Party of any condition or of the breach of any





                                       43
   45
term, provision, covenant, representation or warranty contained in this
Agreement, whether by conduct or otherwise, in any one or more instances, shall
be deemed to be construed as a further or continuing waiver of any such
condition or breach, or a waiver of any other condition or of the breach of any
other term, provision, covenant, representation or warranty.

         14.10   Further Assurances.  After the Closing, each of the Parties
will execute, acknowledge, and deliver to the other such further instruments,
and take such other actions, as may be reasonably requested in order to more
effectively assure to said Party all of the respective properties, rights,
titles, interests, estates, and privileges intended to be assigned, delivered,
or inuring to the benefit of such Party in consummation of the transactions
contemplated hereby.

         14.11   Resignation as Operator, etc.  Within a reasonable period of
time following the Closing, Seller shall execute and deliver to Buyer
appropriate letters resigning as the Operator of any of the Assets that Seller
is operating and other appropriate documents concerning transfer of operations.
Buyer acknowledges and agrees that Seller cannot and does not covenant or
warrant that Buyer shall become successor operator of all or any portion of the
Assets, since the Assets or portions thereof may be subject to unit, pooling,
communitization, operating or other agreements which control the appointment of
a successor operator; provided, however, that Seller agrees to use its
reasonable best efforts to assist Buyer in becoming successor operator.

         14.12   Notices.  All notices, requests, demands, claims and other
communications hereunder will be in writing.  Any notice, request, demand,
claim or other communication hereunder shall be deemed duly given if (and then
two business days after) it is sent by registered or certified mail, return
receipt requested, postage prepaid, and addressed to the intended recipient as
set forth below:

                 IF TO SELLER:

                 EnerVest Acquisition-II Limited Partnership
                 c/o EnerVest Management Company, L.C.
                 1001 Fannin, Suite 1111
                 Houston, Texas 77002
                 Attention:    Mr. John B. Walker
                 Telephone:    (713)659-3500
                 Fax:          (713)659-3556





                                       44
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                 IF TO BUYER:

                 Harken Energy Corporation
                 Harken Exploration Company
                 5605 North MacArthur, Suite 400
                 Irving, Texas 75038
                 Attention:   Mr. Larry Cummings
                 Telephone:   (214)753-6932
                 Fax:         (214)753-6963

Any Party may send any notice, request, demand, claim, or other communication
hereunder to the intended recipient at the address set forth above using any
other means (including personal delivery, expedited courier, messenger service,
telecopy, telex, ordinary mail, or electronic mail), but no such notice,
request, demand, claim, or other communication shall be deemed to have been
duly given unless and until it actually is received by the intended recipient.
Any Party may change the address to which notices, requests, demands, claims,
and other communications hereunder are to be delivered by giving the other
Party notice in the manner herein set forth.

         14.13   Disclaimer of Representations and Warranties.  Except as
expressly set forth in this Agreement and in Conveyance Documents delivered
pursuant to Article 11.01(a), the Parties hereto make no, and disclaim any,
representation or warranty whatsoever, whether express or implied.  Each Party
hereto disclaims all liability and responsibility for any other representation,
warranty, statement, or communication (orally or in writing) to the other Party
(including, but not limited to, any information contained in any opinion,
information, or advice that may have been provided to any such Party by any
officer, stockholder, director, partner, member, manager, employee, agent,
consultant, representative, or contractor of such disclaiming Party or its
Affiliates or any engineer or engineering firm, or other agent, consultant, or
representative) wherever and however made.  Without limiting the generality of
the foregoing, Seller makes no representation or warranty as to (a) the amount,
value, quality, or deliverability of petroleum, natural gas, or other reserves
attributable to the Assets or any portion thereof, or (b) any geological,
engineering, or other interpretations or economic evaluations.  EXCEPT AS
EXPRESSLY PROVIDED IN ARTICLE 4.01(F), ALL TANGIBLE PERSONAL PROPERTY,
EQUIPMENT, FIXTURES AND APPURTENANCES CONSTITUTING A PART OF THE ASSETS ARE
SOLD "AS IS, WHERE IS," AND SELLER MAKES NO, AND DISCLAIMS ANY, REPRESENTATION
OR WARRANTY, WHETHER EXPRESS OR IMPLIED, AND WHETHER BY COMMON LAW, STATUTE, OR
OTHERWISE, AS TO (I) MERCHANTABILITY, (II) FITNESS FOR ANY PARTICULAR PURPOSE,
(III) CONFORMITY TO MODELS OR SAMPLES OF MATERIALS, AND/OR (IV) CONDITION.  The
Parties agree that the preceding disclaimers of warranty are "conspicuous"
disclaimers for purposes of any applicable law, rule, or order.





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         14.14   Severability.  Any term or provision of this Agreement that is
invalid or unenforceable in any situation and in any jurisdiction shall not
affect the validity or enforceability of the remaining terms and provisions
hereof or the validity or enforceability of the offending term or provision in
any other situation or in any other jurisdiction.

         14.15   Texas Deceptive Trade Practices Act Waiver.  Buyer (a)
represents and warrants to Seller that it (i) is acquiring the Assets for
commercial or business use, (ii) has assets in excess of $25,000,000 and (iii)
has knowledge and experience in financial and business matters such that enable
it to evaluate the merits and risks of the transactions contemplated by this
Agreement and is not in a significantly disparate bargaining position with
respect to Seller; and (b) hereby unconditionally and irrevocably waives any
and all rights or remedies it may have under the Deceptive Trade Practices -
Consumer Protection Act of the State of Texas, Tex. Bus. & Com. Code Section
17.41 et seq., other than any of the provisions of Section 17.555 of such Act,
if such Act would for any reason be deemed applicable to the transactions
contemplated hereby.

         14.16   No Third Party Beneficiaries.  Except as provided for in
Articles 7 and 8 hereof with respect to the rights of an Indemnified Party,
this Agreement shall not confer any rights or remedies upon any person other
than the Parties and their respective successors and permitted assigns, and
other persons given rights of indemnification hereunder.

         14.17   Construction.  The Parties have participated jointly in the
negotiating and drafting of this Agreement.  In the event ambiguity or question
of intent or interpretation arises, this Agreement shall be construed as if
drafted jointly by the Parties and no presumption or burden of proof shall
arise favoring or disfavoring either Party by virtue of the authorship of any
of the provisions of this Agreement.  Any reference to any federal, state,
local or foreign statute or law should be deemed also to refer to all rules and
regulations promulgated thereunder, unless the contexts requires otherwise.
The word "including" shall mean including, without limitation.  If the date
specified in this Agreement for giving any notice or taking any action is not a
business day (or if the period during which any notices required to be given or
any action taken expires on a date which is not a business day) then the date
for giving such notice or taking such action (and the expiration date for such
period during which notice is required to be given or action taken) shall be
the next day which is a business day.





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         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first above written, but effective for all purposes as of the
Effective Date.

                                  SELLER:

                                  ENERVEST ACQUISITION-II LIMITED PARTNERSHIP

                                  By: EnerVest Management Company, L.C.,
                                  its sole general partner



                                  By: /s/ James M. Vanderhider                 
                                     -------------------------------------------
                                          James M. Vanderhider
                                          Senior Vice President and 
                                          Chief Financial Officer of 
                                          EnerVest Management Company, L.C.

                                  BUYER:

                                  HARKEN ENERGY CORPORATION



                                  By: /s/ Larry E. Cummings       
                                     -------------------------------------------
                                          Larry E. Cummings
                                          Vice President


                                  HARKEN EXPLORATION COMPANY



                                  By: /s/ Larry E. Cummings                     
                                     -------------------------------------------
                                          Larry E. Cummings
                                          Vice President





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