Oil and Gas Exploration Company

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.
Cabot Oil & Gas Corporation - Operating in the onshore Texas and Louisiana Gulf Coast, Rocky Mountains, Appalachia and Mid-Continent.
Cairn Energy PLC - International operator. Current operations are primarily in the North Sea and the Indian Subcontinent. Based in Scotland.
Callon Petroleum Company - Operations in Louisiana, Alabama and offshore Gulf of Mexico.
Canada Southern Petroleum, Ltd. - Calgary-based exploration company, operating in several western provinces, the Yukon and Northwest Territories and Canada's Arctic Islands.
Century Exploration Company - Exploration and production in Gulf of Mexico, South Louisiana, Mississippi and Texas. Company has a concession in the Dutch North Sea.
Chevron Corp. - Produces and refines oil. Includes product information, community programs and learning center.
Chroma Energy, Inc. - Utilizing proprietary seismic pattern imaging technology in parnerships with exploration organizations.
Clayton Williams Energy - Operates primarily in Texas, Louisiana and New Mexico. The company has expertise with horizontal drilling and the use of 3-D seismic.
Compton Petroleum Ltd. - Calgary-based independent operating in Western Canada.
Comstock Resources, Inc. - Operating in Texas, Louisiana, and the Gulf of Mexico.
Continental Energy Corporation - A small independent operator concentrating on Indonesian concessions which total 3.7 million acres.
Credo Petroleum Corporation - Operates in Midcontinent and Rockies. Shelf of Anadarko basin is core area.
Curlew Lake Resources Inc. - Operations in western Canada and the United States.
Cyrus Oil and Gas Company - Operating in west and central Texas, Alabama, and in central California.
D and L Energy, Inc. - Oil and gas exploration, development and marketing in Ohio and Pennsylvania.
Darwin Oil Company - Operates in West Texas and S.E. New Mexico, and internationally in Ecuador and Argentina.
Dave Easom Production Company, Inc. - Exploration and Production operations and consulting in SW Mississippi and N. Central Louisiana.
Defiant Energy Corporation - Operating in Alberta west of the 5th meridian. Main emphasis is natural gas.
Delta Petroleum Corporation - Acquires, explores for, develops and operates oil and gas properties and related business activities. (Nasdaq: DPTR).
Denbury Resources, Inc. - Independent oil and natural gas producer.
Denbury Resources, Inc. - Activities in the Gulf Coast region, Mississippi and Louisiana, and off-shore Gulf of Mexico.
Derek Resources - Operates previously uneconomic heavy oil reservoirs using steam and gas assisted gravity drainage and low temperature oxidation technologies.
Devon Energy Corporation - Oil and gas exploration, production and property acquisition (NYSE: DVN).
Diaz Resources Ltd. - A Calgary-based company operating mostly in Alberta, Saskatchewan and Texas.
Douglas Oil & Gas - Generating and developing natural gas prospects in the Appalachian and Permian Basins.
Dynamic Oil & Gas Inc. - Acquires and explores for oil and gas properties in Canadian provinces. (Nasdaq: DYOLF).
Edge Petroleum Corporation - Operates onshore on US Gulf Coast.
Emerald Energy Plc. - Operates in Columbia, Argentina, Denmark and the Appalachian basin of USA. Based in United Kingdom.
Energen Corporation - Diversified energy company, focusing on natural gas distribution, and oil and gas exploration and production. (NYSE:EGN).
Energy Africa - Production in Congo, Equatorial Guinea, Gabon, South Africa and the United Kingdom. Has petroleum interests in 11 countries in sub-Saharan and North Africa.
EOG Resources Inc. - Engaged in the exploration and development, production and marketing of natural gas and crude oil . Features operations overview, career opportunities, and investor information. ( NYSE: EOG )
Equity Oil Company - Explores for and produces crude oil and natural gas. (Nasdaq: EQTY).
Esenjay Exploration Incorporated - Explores for and develops natural gas and oil reserves. (Nasdaq: ESNJ).
Essar Oil Limited - Offshore and onshore exploration and production in India. Bombay High production.
Essential Petroleum Resources Ltd. - Exploring in Australia's Otway Basin.
EXCO Resources, Inc. - Explores for and produces oil and natural gas. (Nasdaq: EXCO).
Farmer Energy Services - Illinois Basin company involved in exploration and development of coal methane from abandoned mines, virgin coal and New Albany Shale.
Forest Oil Corporation - Explores for, develops, acquires, exploits and produces oil and natural gas, primarily in the Gulf of Mexico, Alaska, and Western Canada. Includes corporate data, investor center, and career opportunities. (Nasdaq: FST).
Forum Energy Corporation - Independent energy company listed on the NASD OTC Bulletin Board (FRUEF) and the Frankfurt and Munich Stock Exchanges (FE8).
FX Energy - Utah company, with operations focused in Poland.
Gastar Exploration Ltd. - Operates coal bed methane properties in Wyoming and Australia. Exploring for deep gas in California.
GeoResources, Inc. - Explores for, develops and produces oil and natural gas properties. (Nasdaq: GEOI).
Gibraltar Energy Company - Operating in the Black Warrior Basin of Northern Mississippi and Alabama.
Globex Resources Energy Company - Operates in western Canada. Pursuing development opportunities in India.
Greka Energy Corporation - Explores for, acquires, develops and extracts oil and gas, and limestone. (Nasdaq: GRKA).
GSV, Inc. - An oil and gas exploration company.
Habinero Resources Inc. - Gas exploration in California.
Harken Energy Corporation - Operates mostly in southeast Texas and Gulf Coast region.
Harvest Natural Resources - Formerly Benton Oil and Gas. Operating mainly in Venezuela and Russia.
Horizon Offshore, Inc. - Provides marine construction services to the offshore oil and gas industry primarily in Gulf of Mexico. (Nasdaq: HOFF).
Houston Energy, Inc. - Exploring offshore Gulf of Mexico, Louisiana and Texas Gulf Coast. Also West Texas/southeast New Mexico.
Hydro Oil and Energy - Operating on the Norwegian continental shelf. Company also operates in Angola, Canada, Libya and Russia, with prospects in Iran and the Mexican Gulf.
Hyperdynamics Corporation - Focused on oil and gas exploration, discover and produce commercially viable hydrocarbons and facilitate efficient seismic data management . Features information on products and services, investor data, technology center, and careers. ( OTC/BB:HYPD )
Icon Energy, Limited - Australian company, operating in the Cooper-Eromanga and Surat-Bowen Basins of Queensland, Australia.
Indo Pacific - New Zealand company, operating in the Austral-Pacific region.
Infinity, Inc. - Focusing on coalbed methane. Properties in Green River Basin of Wyoming and elsewhere. Also provide oilfield services in Kansas, Oklahoma, Missouri, and Wyoming.
K2 Energy Corporation - Operates on the Blackfeet Indian Reservation in northern Montana.
Kerr-McGee Rocky Mountain Corp. - Operating in the D-J Basin, Gulf Coast, and Rocky Mountain regions of the United States.
Kestrel Energy, Inc. - Explores for and develops oil and natural gas properties and acquires interests in oil and gas leases. (Nasdaq: KEST).
Khanty Mansiysk Oil Corporation (KMOC) - A US-registered company, operating in the Western Siberian basin of the Russian Federation.
Lakes Oil - Operating in Victoria, South Australia and Queensland.
Lukoil Overseas Holding Ltd. - Subsiderary of Lukoil that is responsible for managing the company's international oil and gas projects.
Lundin Petroleum - Swedish company operating in Sudan and Iran.
Magellan Petroleum Corporation - Explores for, develops and produces oil and gas. (Nasdaq: MPET).
Magnum Hunter Resources, Inc. - Oil and gas producer. Based in Irving, TX 75039, USA. (NYSE:MHR; AMEX:MHR.WS.A)
Mark L. Shidler Inc. - Operations in Texas, Louisiana, Oklahoma, New Mexico, and Mississippi.
MC3 Resources - Operating primarily in Saskatchewan, Canada. Also provides third party management of hydrocarbons operations.
McMoRan Exploration - Operating offshore in the Gulf of Mexico and onshore in the Gulf Coast area.
The Meridian Resource Corporation - Operates in south Louisiana, southeast Texas, and the Gulf of Mexico.
Minard Run Oil Company - Family-run company with 22 employees producing oil in Pennsylvania.
Mission Resources - Operating in the Permian basin, east Texas, Gulf coast, and off-shore Gulf of Mexico.
Mount Dakota Energy Corporation - Operating in Alberta and Kansas.
Mountain V Oil and Gas, Inc. - Operating in West Virginia and Pennsylvania.