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Seitel, Inc. is a leading provider of seismic data and related geophysical expertise to the petroleum industry. The data, which is used to locate oil and gas, primarily covers the Gulf of Mexico, the US Gulf Coast, and western Canada. Seitel, Inc. contracts with third-party seismic crews to gather data but handles the processing itself through its Olympic Seismic, Seitel Data, Seitel Matrix, Seitel Solutions business units. The bulk of Seitel's total revenues comes from the acquisition and licensing of seismic data. The balance is primarily generated by its Seitel Solutions subsidiary, which gives customers access to the company's seismic database. Main focus of Seitel, Inc. is at Onshore, offshore, and transition zone of the U.S. Gulf of Mexico, onshore East Texas, and Canada.

Serica Energy plc is an international oil and gas exploration and production company with activities focussed on Western Europe and South East Asia. Serica has operations in the UK North Sea, Ireland, Spain, Morocco and Indonesia and has built a portfolio of exploration, appraisal and development projects, striking a balance between established hydrocarbon-producing basins where the chances of success are high, and untested basins where success is less certain but the rewards of success are more significant. Serica Energy plc, formed in 2004 through the merger of Kyrgoil Holding and Petroleum Development Associates, explores for and produces oil and gas in Indonesia, Ireland, Norway, Spain, the UK, and the Norwegian sectors of the North Sea. Serica Energy controls proved and probable reserves of 5.7 billion barrels of oil and 41.8 billion cu. ft. of natural gas. Serica Energy has a 20% interest in the Norwegian Bream oil discovery. To raise capital, in 2010 Serica Energy plc sold assets in Indonesia and Vietnam to KrisEnergy for $1905 million.

Sharon Energy Ltd. holds a 25% working interest in the Hound Dog Dickson well of the Wilcox gas zone. The junior oil and gas company has natural gas exploration programs in Texas in the US, and in Alberta and Saskatchewan in Canada. Sharon Energy Ltd. produces more than 300 barrels of oil equivalent per day. Operations in Alberta include participation in gas discoveries, including interests in gas wells in the Harmattan field. Sharon Energy has total net proved plus probable reserves of nearly 1.5 million barrels of oil equivalent. To raise cash, In 2009 Sharon Energy Ltd. sold subsidiary Sharon Resources to Houston-based Magnum Hunter Resources.

Shell Canada Limited is one of Canada's largest integrated oil companies. Shell Canada explores for and produces oil and natural gas. Shell Canada Limited also refines oil and markets it as gasoline and other refined products at 2,100 service stations. Shell Canada Limited is a major producer of natural gas liquids, bitumen, and sulfur. Shell Canada owns 60% of Alberta's Athabasca Oil Sands Project, which produces 155,000 barrels of bitumen per day, and explores and produces natural gas in Nova Scotia where it holds 31% of the Sable Offshore Energy Project. Shell Canada Limited is a wholly-owned subsidiary of Royal Dutch Shell.

Signa Engineering Corp. is a leading edge petroleum engineering and operations management company. Signa's primary focus is the evaluation, design and execution of drilling and completion operations, onshore and offshore, both domestic and international, for projects involving vertical, directional, horizontal or underbalanced operations. Signa has the engineering expertise and the drilling consultants required. Signa Engineering Corp. services include underbalanced operation engineering, oil and gas property management, field supervision, reservoir and geological engineering, and litigation support. Signa Engineering also develops custom software used for engineering analysis, hydraulics simulation, and multimedia presentations. Signa Engineering Corp. was founded in 1992 by chairman and CEO Rick Stone. Its customers include Burlington Resources, Chevron, and Weatherford International.

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