Occidental Petroleum Corp.

Dr. Irani has been Chairman and Chief Executive Officer of Occidental since 1990. He was Chief Operating Officer from 1984 to 1990. He was Chairman of the Board of Directors of Canadian Occidental Petroleum Ltd. (now Nexen Inc.) from 1987 to 1999. Dr. Irani also is a director of Wynn Resorts, Limited and TCW Group.

Casey Olson is President, Middle East of Occidental Petroleum Corporation and currently manages Occidental's extensive E&P interests in the Middle East, in addition to being a board member of Dolphin Energy Limited, He was earlier Executive Vice President of Business Development for Occidental Oil and Gas Company, responsible for all business development for the company. Prior to joining Occidental, Mr Olson was an investment banker, holding the position of Managing Director, Global Energy for CIBC Wood Gundy Securities Corp. He also spent seven years as Vice President Energy Ventures for Hunt Oil Company, where he was responsible for evaluating new exploration projects, as well as the management of operating partnerships with U.S., French, Kuwaiti, Russian and Korean oil companies.

Mr. Stevens is the former President of Southwestern Energy Exploration and Production Company and a Senior Vice President of Worldwide Exploration for Occidental Petroleum. Mr. Stevens has over 35 years experience in technical and managerial positions involving all phases of hydrocarbon exploration, production, operations, and contract negotiations for both domestic and international operations. While in his senior positions with Southwestern and Occidental, Mr. Stevens managed staffs of 85-100 people and annual capital budgets of US$150 MM. He also has held a management position with Tenneco Oil Company. Mr. Stevens currently devotes 15% of his time on the affairs of Derek.

Keith C. Hill is currently President of Lundin Russia, Chairman of Pearl Exploration and Production and a Board Member of Tanganyika Oil. Mr. Hill was also the former Founder and President of Valkyries Petroleum Corp. He has also been the General Manager for Lundin Malaysia and Lundin Sudan. He has over 17 years of experience in the oil industry including a geologist position with Occidental Petroleum Corporation and Shell Oil Company. His educational background includes a B.Sc. in Geophysics and M.Sc. in Geology from Michigan State University and a M.B.A. in International Business and Finance from the University of St. Thomas in Houston, TX.

Mr. Syriani has served since 2002 as President and Chief Executive Officer of The Olayan Group, a diversified trading, services and investment organization with activities and interests in the Middle East and elsewhere. From 1978 until 2002, he served as President and Chief Operating Officer of The Olayan Group. Mr. Syriani is also a director of The Credit Suisse Group. He was Chairman of the Audit Committee of The Credit Suisse Group from April 2002 until April 2004, and since April 2004, has been Chairman of its Compensation Committee.

From 1992 until his retirement in 1998, Mr. Maloney was President and Chief Executive Officer of Dataproducts Corporation, which designs, manufactures and markets printers and supplies for computers.

Formerly President and Chief Operating Officer of NOVA Chemicals and Senior Vice-President of NOVA Corporation, John was responsible for all of NOVA's investments and operations in hydrocarbon feedstock supply, petrochemicals and thermoplastics products. He established NOVA as a leader in plant reliability, utilization rates, occupational health and safety, and environmental performance in North America. In addition to his responsibilities at Kemex, John is President and CEO of Matrix Solutions Inc., providing environmental services to the upstream oil and gas industry. John is currently on the Board of Directors for Occidental Petroleum Corp., Fort Chicago Energy Partners LP, and Alliance Pipeline Ltd.