Oil and Gas Exploration and Production Business Contracts

Apache Corp.

• 401(k) Savings Plan - Apache Corp. (Jan 02, 2012)
• Omnibus Equity Compensation Plan - Apache Corp. (Jan 02, 2012)
• Retirement Plan - Outside Directors - Apache Corp. (Jan 02, 2012)
• Bylaws - Apache Corp. (Jan 02, 2012)
• 5151 San Felipe Road (Houston, TX) Sublease Agreement - Apache Corp. and IWC Services Inc. (Oct 17, 2009)
• Underwriting Agreement - Apache Corp. (Jan 02, 2012)

Bank of America Corp.

• Credit Agreement - Tom Brown Inc., Chase Manhattan Bank, Bank of America NA, U.S. Bank NA and Bank of Nova Scotia (Oct 17, 2009)

Boots & Coots International Well Control Inc.

• 5151 San Felipe Road (Houston, TX) Sublease Agreement - Apache Corp. and IWC Services Inc. (Oct 17, 2009)

Brown Tom Inc.

• 401(k) Retirement Plan - Tom Brown Inc. (Oct 17, 2009)
• 1993 Stock Option Plan - Tom Brown Inc. (Oct 17, 2009)
• 1993 Stock Option Plan - Tom Brown Inc. (Oct 17, 2009)
• 1999 Long Term Incentive Plan - Tom Brown Inc. (Oct 17, 2009)
• 1999 Long Term Incentive Plan - Tom Brown Inc. (Oct 17, 2009)
• Deferred Compensation Plan - Tom Brown Inc. (Oct 17, 2009)
• Employment Agreement - Tom Brown Inc. and Donald L. Evans (Oct 17, 2009)
• Employment Agreement - Tom Brown Inc. and Donald L. Evans (Oct 17, 2009)
• Employment Agreement - Tom Brown Inc. and James D. Lightner (Oct 17, 2009)
• Severance Agreement - Tom Brown Inc. (Oct 17, 2009)
• Severance Agreements - Tom Brown Inc. and Donald L. Evans, William R. Granberry, Peter R. Scherer, Thomas W. Dyk, Bruce R. DeBoer, Clifford C. Drescher, Richard B. Porter, R. Kim Harris, B. Jack Reed and William H. Munn II (Oct 17, 2009)
• Severance Plan - Tom Brown Inc. (Oct 17, 2009)
• Severance Plan - Tom Brown Inc. (Oct 17, 2009)
• Credit Agreement - Tom Brown Inc., Chase Manhattan Bank, Bank of America NA, U.S. Bank NA and Bank of Nova Scotia (Oct 17, 2009)
• Credit Agreement - Tom Brown Inc., Chase Manhattan Bank, NationsBank of Texas NA and U.S. Bank NA (Oct 17, 2009)
• Certificate of Incorporation - Tom Brown Inc. (Oct 17, 2009)
• Certificate of Incorporation - Tom Brown Inc. (Oct 17, 2009)
• Wild Horse Limited Liability Company Agreement - K N Energy Inc. and Tom Brown Inc. (Oct 17, 2009)
• Agreement and Plan of Reorganization - Tom Brown Inc., K N Production Co. and K N Energy Inc. (Oct 17, 2009)
• Exchange Agreement - Presidio Oil Co., Presidio Exploration Inc., Presidio West Virginia, Palisade Oil Inc. and Tom Brown Inc. (Oct 17, 2009)
• Exchange Agreement - Presidio Oil Co., Presidio Exploration Inc., Presidio West Virginia, Palisade Oil Inc. and Tom Brown Inc. (Oct 17, 2009)
• Exchange Agreement - Presidio Oil Co., Presidio Exploration Inc., Presidio West Virginia, Palisade Oil Inc. and Tom Brown Inc. (Oct 17, 2009)
• Exchange Agreement - Presidio Oil Co., Presidio Exploration Inc., Presidio West Virginia Inc., Palisade Oil inc and Tom Brown Inc. (Oct 17, 2009)
• Pre-Acquisition Agreement - Tom Brown Inc. and Stellarton Energy Corp. (Oct 17, 2009)
• Purchase and Sale Agreement - Genesis Gas & Oil LLC and TBI Production Co. (Oct 17, 2009)
• Purchase and Sale Agreement - Union Oil Co. of California and Tom Brown Inc. (Oct 17, 2009)
• Registration Rights Agreement - Tom Brown Inc. and K N Energy Inc. (Oct 17, 2009)
• Stock Ownership and Registration Rights Agreement - Union Oil Co. of California and Tom Brown Inc. (Oct 17, 2009)

Chevron Corp.

• Chevron Financial Statement on Tax Deferred Savings Plan (Jul 27, 2011)
• Chevron Form 11-K (Jul 27, 2011)
• Employment Agreement with Charles A. James - Chevron (Dec 19, 2011)
• Long-Term Incentive Award Agreement - Chevron (Dec 18, 2011)
• Restricted Stock Unit Award Agreement - Chevron (Dec 18, 2011)
• Retainer Stock Option Agreement - Chevron (Dec 18, 2011)
• Termination Agreement with Charles A. James - Chevron (Dec 19, 2011)
• Amended and Restated Bylaws - Chevron (Dec 18, 2011)
• Class B Stock Purchase Agreement - Dynegy Inc. and Chevron U.S.A. Inc. (Oct 17, 2009)
• Chevron Form 8-K (Jul 27, 2011)
• Shareholder Agreement - Dynegy Inc. and Chevron U.S.A. Inc. (Oct 17, 2009)

ChevronTexaco Corp.

• Purchase Rights Agreement - Dynegy Inc and ChevronTexaco Corp. (Oct 17, 2009)

Citigroup Inc.

• Agreement and Consent - Dynegy Inc., Enron Corp., Northern Natural Gas Co., Citicorp U.S.A. Inc., JPMorgan Chase Bank (Oct 17, 2009)

Dynegy Inc.

• By-Laws - Dynegy Inc. (Oct 17, 2009)
• Agreement and Consent - Dynegy Inc., Enron Corp., Northern Natural Gas Co., Citicorp U.S.A. Inc., JPMorgan Chase Bank (Oct 17, 2009)
• Agreement and Plan of Merger - Dynegy Inc. and Enron Corp. (Oct 17, 2009)
• Class B Stock Purchase Agreement - Dynegy Inc. and Chevron U.S.A. Inc. (Oct 17, 2009)
• Exchange Agreement (Amendment) - Dynegy Inc. and Enron Corp. (Oct 17, 2009)
• Exchange Agreement - Dynegy Inc. and Enron Corp. (Oct 17, 2009)
• Option Agreement - Enron Corp. and Dynegy Inc. (Oct 17, 2009)
• Purchase Option Agreement (Amendment) - Enron Corp., Dynegy Inc., Northern Natural Gas Co. (Oct 17, 2009)
• Purchase Option Agreement - Enron Corp. Dynegy Inc., Northern Natural Gas Co. (Oct 17, 2009)
• Purchase Rights Agreement - Dynegy Inc and ChevronTexaco Corp. (Oct 17, 2009)
• Shareholder Agreement - Dynegy Inc. and Chevron U.S.A. Inc. (Oct 17, 2009)

Enron Corp.

• Agreement and Consent - Dynegy Inc., Enron Corp., Northern Natural Gas Co., Citicorp U.S.A. Inc., JPMorgan Chase Bank (Oct 17, 2009)
• Agreement and Plan of Merger - Dynegy Inc. and Enron Corp. (Oct 17, 2009)
• Exchange Agreement (Amendment) - Dynegy Inc. and Enron Corp. (Oct 17, 2009)
• Exchange Agreement - Dynegy Inc. and Enron Corp. (Oct 17, 2009)
• Option Agreement - Enron Corp. and Dynegy Inc. (Oct 17, 2009)
• Purchase Option Agreement (Amendment) - Enron Corp., Dynegy Inc., Northern Natural Gas Co. (Oct 17, 2009)
• Purchase Option Agreement - Enron Corp. Dynegy Inc., Northern Natural Gas Co. (Oct 17, 2009)

Harken Oil & Gas Inc.

• Partial Settlement and Conversion Agreement - Joseph F. Langston Jr. and Search Exploration Inc. (Oct 17, 2009)
• Development Finance Agreement - Harken Energy Corp. and Harken Capital Corp. (Oct 17, 2009)
• Development Finance Agreement - Harken Energy Corp., Arbco Associates LP, Offense Group Associates LP, Kayne, Anderson Nontraditional Investments LP and Opportunity Associates LP (Oct 17, 2009)
• Development Finance Agreement - Harken Energy Corp., EnCap Energy Capital Fund III LP, EnCap Energy Capital Fund III-B LP, BOCP Energy Partners LP and Energy Capital Investment Co. (Oct 17, 2009)
• Promissory Note - Harken Exploration Co. and Momentum Operating Co. Inc. (Oct 17, 2009)
• Restructuring and Sale Agreement - Harken Energy Corp., Harken Energy West Texas Inc., Internationale Nederlanden (U.S.) Capital Corp., New England Mutual Life Insurance Corp., and EnCap 1989-I LP (Oct 17, 2009)
• Assignment of Overriding Royalty Interest - Dobbins Partners LP and Search Exploration Inc. (Oct 17, 2009)
• Assignment of Overriding Royalty Interest - Langston Investments Inc. and Search Exploration Inc. (Oct 17, 2009)
• Assignment of Overriding Royalty Interest - O'Donnell & Masur and Search Exploration Inc. (Oct 17, 2009)
• Association Contract - Empresa Colombiana de Petroleos (ECOPETROL) and Harken de Colombia Ltd. (Oct 17, 2009)
• Association Contract - Empresa Colombiana de Petroleos (ECOPETROL) and Harken de Colombia Ltd. (Oct 17, 2009)
• Association Contract - Empresa Colombiana de Petroleos (ECOPETROL) and Harken de Colombia Ltd. (Oct 17, 2009)
• Association Contract - Empresa Colombiana de Petroleos (ECOPETROL) and Harken de Colombia Ltd. (Oct 17, 2009)
• Drilling Contract - Harken de Colombia Ltd. and Marlin Colombia Drilling Co. Inc. (Oct 17, 2009)
• Drilling Contract - Harken de Colombia Ltd. and Parker Drilling Co. Intl. Ltd. (Oct 17, 2009)
• Partial Settlement and Conversion Agreement - Concorde Financial Corp. and Search Exploration Inc. (Oct 17, 2009)
• Partial Settlement and Conversion Agreement - EnCap Investments LC and Search Exploration Inc. (Oct 17, 2009)
• Acquisition Proposal Letter - Huffco Group Inc. and Harken de Colombia Ltd. (Oct 17, 2009)
• Agreement and Plan of Merger - Harken Energy Co. and Xplor Energy Inc. (Oct 17, 2009)
• Agreement and Plan of Merger - Harken Energy Corp. and Search Exploration inc. (Oct 17, 2009)
• Agreement of Sale and Purchase - Yellowhouse Project Co. and Harken Energy West Texas Inc. (Oct 17, 2009)
• Asset Purchase and Sale Agreement - Enervest Acquisition-II LP, Harken Energy Corp. and Harken Exploration Co. (Oct 17, 2009)
• Asset Purchase and Sale Agreement - St. Martinville Partners Ltd., Bargo Energy Co., Harken Energy Corp. and Harken Exploration Co. (Oct 17, 2009)
• Concession and Lease Purchase Agreement - C A B Resources Inc., Crusader Inc., Australian Hydrocarbons Inc. and Harken Energy Corp. (Oct 17, 2009)
• Concession and Lease Purchase Agreement - Paroo Petroleum (USA) Inc. and Harken Energy Corp. (Oct 17, 2009)
• Exchange Agreement - Harken Energy Corp., Harken Capital Corp., Sidro SA, Lambertine Holdings Ltd. and Rauscher Pierce & Clark (Guernsey) Ltd. (Oct 17, 2009)
• Exchange Agreement - Momentum Operating Co. and Harken Exploration Co. (Oct 17, 2009)
• Purchase and Sale Agreement - Momentum Operating Co., Harken Exploration Co. and Harken Energy Corp. (Oct 17, 2009)
• Purchase and Sale Agreement - Republic Resources Inc. and Harken Energy Corp. (Oct 17, 2009)
• Securities Purchase Agreement - Harken Energy Corp. and RGC International Investors LDC (Oct 17, 2009)
• Rights Agreement - Harken Energy Corp. and ChaseMellon Shareholder Services LLC (Oct 17, 2009)

Hess Corp.

• Amended and Restated Change in Control Agreement with Bohling - Hess (Oct 12, 2011)
• Amended and Restated Change in Control Agreement with Walker - Hess (Oct 12, 2011)
• Amended and Restated Termination Benefits Agreement - Hess (Oct 11, 2011)
• Form Restricted Stock Award Agreement - Hess (Oct 11, 2011)
• Form Stock Option Agreement - Hess (Oct 11, 2011)
• General Counsel Employment Offer - Hess (Oct 11, 2011)
• Letter Report on Proved Reserve Audit - Hess (Oct 12, 2011)

Mirant Corp.

• Formation Agreement - SEI Holdings Inc. and Vastar Resources Inc. (Oct 17, 2009)

Occidental Petroleum Corp.

• Acknowledgment Letter - Effect of Write-Down on Return on Equity Incentive Award - Occidental Petroleum Corp. (Feb 21, 2012)
• Employment Agreement - President - Occidental Petroleum Corp. (Feb 21, 2012)
• Long-Term Incentive Award Agreement - Occidental Petroleum Corp. (Feb 21, 2012)
• Officers' Certificate - Occidental Petroleum Corp. (Feb 21, 2012)
• Certificate of Incorporation - Occidental Petroleum Corp. (Oct 17, 2009)
• Purchase and Sale Agreement - Amoco D.T. Co., Amoco X.T. Co, Amoco Y.T. Co, SWEPI LP, Shell Land & Energy Co, Shell Onshore Ventures Inc., Shell K2 Inc., Shell Everest Inc. and Occidental Petroleum Corp. (Oct 17, 2009)
• Note - Occidental Petroleum Corp. (Feb 21, 2012)
• Underwriting Agreement - Occidental Petroleum Corp. (Feb 21, 2012)

Republic Resources Inc.

• Purchase and Sale Agreement - Republic Resources Inc. and Harken Energy Corp. (Oct 17, 2009)

Shell Oil Co.

• Purchase and Sale Agreement - Amoco D.T. Co., Amoco X.T. Co, Amoco Y.T. Co, SWEPI LP, Shell Land & Energy Co, Shell Onshore Ventures Inc., Shell K2 Inc., Shell Everest Inc. and Occidental Petroleum Corp. (Oct 17, 2009)

Titan Exploration Inc.

• Agreement and Plan of Merger - Union Oil Co. of California and Titan Exploration Inc. (Oct 17, 2009)
• Business Opportunities Agreement - Union Oil Co. of California and Titan Exploration Inc. (Oct 17, 2009)

Unocal Corp.

• Change in Control Agreement - Unocal Corp. and Timothy H. Ling (Oct 17, 2009)
• Consulting and Settlement Agreement - Unocal Corp. and Roger C. Beach (Oct 17, 2009)
• Agreement and Plan of Merger - Union Oil Co. of California and Titan Exploration Inc. (Oct 17, 2009)
• Business Opportunities Agreement - Union Oil Co. of California and Titan Exploration Inc. (Oct 17, 2009)
• Purchase and Sale Agreement - Union Oil Co. of California and Tom Brown Inc. (Oct 17, 2009)
• Stock Ownership and Registration Rights Agreement - Union Oil Co. of California and Tom Brown Inc. (Oct 17, 2009)

Vastar Resources Inc.

• Formation Agreement - SEI Holdings Inc. and Vastar Resources Inc. (Oct 17, 2009)