Aera Energy LLC
California oil and gas producer with operating properties extending from the LA Basin in the south to the Sacramento Delta in the north.
American International Petroleum Corporation
Explores for, develops, produces, refines and markets oil and natural gas. (Nasdaq: AIPN)
American Shoreline, Inc. (AMSHORE)
Operations focus in Colorado, New Mexico and Texas.
Ameritex Minerals, Inc.
Texas operator using 3D seismic to generate prospects.
Amity Oil Limited
Australian-based, operating in Turkey, Australia, and in the Anadarko basin in Oklahoma and Kansas.
Anadarko Petroleum Corporation
Operations in Alaska, western Canada, Rocky Mountains, mid- continent, Permian, Texas, Louisiana and Gulf of Mexico; and internationally in Algeria, Tunisia, West Africa and Australia (NYSE: APC).
Anglo Siberian Oil Company plc
British company operating in Russia.
Anglo-Suisse Offshore Partners, LLC
ASOP is a Houston-based independent oil and gas company focused on the acquisition and exploitation of producing assets domestically and abroad.
AO Tatneft
Explores for and produces oil in Russia. (NYSE: TNT).
Apache Corporation
Operations in the United States, Canada, Egypt, Western Australia, Argentina, Poland and China.
Aruba Petroleum Inc.
Operations focused on Barnett Shale plays in north Texas, and on the Anakarko Basin in Oklahoma.
Aspen Exploration Corporation
Operating primarily in northern California.
Beck Pump and Supply Co.
Oil and gas operator in Oklahoma, Kansas and Texas.
Berry Petroleum Co.
Independent oil producer located in southern California. (NYSE: BRY)
Black Diamond Energy, Inc.
Driller and developer of Coal Bed Methane in the Powder River Basin in Northeastern Wyoming.
Black River Royalties, Ltd.
Acquiring leases in the southern tier of New York and the northern tier of Pennsylvania with emphasis on the Trenton-Black River natural gas play.
Bocor Producing
Ohio oil and gas operator.
BreitBurn Energy
Operates primarily in California. Also pursuing exploration in Wyoming, Texas, Louisiana and shallow Gulf of Mexico.
Brigham Exploration Company
Operates in Oklahoma, West Texas and onshore Gulf Coast. Emphasizes use of seismic imaging techniques.
Burlington Resources
Operating in Canada, mid-continent, San Juan basin, Algeria, China, East Irish Sea, and in Latin America.
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