California oil and gas producer with operating properties extending from the LA Basin in the south to the Sacramento Delta in the north.

Explores for, develops, produces, refines and markets oil and natural gas. (Nasdaq: AIPN)

Operations focus in Colorado, New Mexico and Texas.

Texas operator using 3D seismic to generate prospects.

Australian-based, operating in Turkey, Australia, and in the Anadarko basin in Oklahoma and Kansas.

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.

British company operating in Russia.

ASI is a Houston-based independent oil and gas company focused on the acquisition and exploitation of producing assets domestically and abroad.

Explores for and produces oil in Russia. (NYSE: TNT).

Operations in the United States, Canada, Egypt, Western Australia, Argentina, Poland and China. ?

Operations focused on Barnett Shale plays in north Texas, and on the Anakarko Basin in Oklahoma.

Operating primarily in northern California.

Oil and gas operator in Oklahoma, Kansas and Texas.

Independent oil producer located in southern California. (NYSE: BRY)

Driller and developer of Coal Bed Methane in the Powder River Basin in Northeastern Wyoming.

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.

Ohio oil and gas operator.

Operates primarily in California. Also pursuing exploration in Wyoming, Texas, Louisiana and shallow Gulf of Mexico.

Operates in Oklahoma, West Texas and onshore Gulf Coast. Emphasizes use of seismic imaging techniques.

Operating in Canada, mid-continent, San Juan basin, Algeria, China, East Irish Sea, and in Latin America.

Operating in the onshore Texas and Louisiana Gulf Coast, Rocky Mountains, Appalachia and Mid-Continent.

International operator. Current operations are primarily in the North Sea and the Indian Subcontinent. Based in Scotland.

Operations in Louisiana, Alabama and offshore Gulf of Mexico.

Calgary-based exploration company, operating in several western provinces, the Yukon and Northwest Territories and Canada's Arctic Islands.

Exploration and production in Gulf of Mexico, South Louisiana, Mississippi and Texas. Company has a concession in the Dutch North Sea.

Produces and refines oil. Includes product information, community programs and learning center.

Utilizing proprietary seismic pattern imaging technology in parnerships with exploration organizations.

Operates primarily in Texas, Louisiana and New Mexico. The company has expertise with horizontal drilling and the use of 3-D seismic.

Calgary-based independent operating in Western Canada.

Operating in Texas, Louisiana, and the Gulf of Mexico.

Gulf Coast onshore and offshore operator. Specializes in acquisition of proven properties and in controlling production costs.

A small independent operator concentrating on Indonesian concessions which total 3.7 million acres.

Operates in Midcontinent and Rockies. Shelf of Anadarko basin is core area.

Operations in western Canada and the United States.

Operating in west and central Texas, Alabama, and in central California.

Oil and gas exploration, development and marketing in Ohio and Pennsylvania.

Operates in West Texas and S.E. New Mexico, and internationally in Ecuador and Argentina.

Exploration and Production operations and consulting in SW Mississippi and N. Central Louisiana.

Operating in Alberta west of the 5th meridian. Main emphasis is natural gas.

Acquires, explores for, develops and operates oil and gas properties and related business activities. (Nasdaq: DPTR).

Activities in the Gulf Coast region, Mississippi and Louisiana, and off-shore Gulf of Mexico.

Independent oil and natural gas producer.

Operates previously uneconomic heavy oil reservoirs using steam and gas assisted gravity drainage and low temperature oxidation technologies.

A Calgary-based company operating mostly in Alberta, Saskatchewan and Texas.

Acquires and explores for oil and gas properties in Canadian provinces. (Nasdaq: DYOLF).

Operates onshore on US Gulf Coast.

Operates in Columbia, Argentina, Denmark and the Appalachian basin of USA. Based in United Kingdom.

Diversified energy company, focusing on natural gas distribution, and oil and gas exploration and production. (NYSE:EGN).

Production in Congo, Equatorial Guinea, Gabon, South Africa and the United Kingdom. Has petroleum interests in 11 countries in sub-Saharan and North Africa.

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 )

Explores for and produces crude oil and natural gas. (Nasdaq: EQTY).

Explores for and develops natural gas and oil reserves. (Nasdaq: ESNJ).

Offshore and onshore exploration and production in India. Bombay High production.

Exploring in Australia's Otway Basin.

Explores for and produces oil and natural gas. (Nasdaq: EXCO).

Illinois Basin company involved in exploration and development of coal methane from abandoned mines, virgin coal and New Albany Shale.

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).

Independent energy company listed on the NASD OTC Bulletin Board (FRUEF) and the Frankfurt and Munich Stock Exchanges (FE8).

Utah company, with operations focused in Poland.

Operates coal bed methane properties in Wyoming and Australia. Exploring for deep gas in California.

Explores for, develops and produces oil and natural gas properties. (Nasdaq: GEOI).

Operating in the Black Warrior Basin of Northern Mississippi and Alabama.

Operates in western Canada. Pursuing development opportunities in India.

Explores for, acquires, develops and extracts oil and gas, and limestone. (Nasdaq: GRKA).

An oil and gas exploration company.

Gas exploration in California.

Operates mostly in southeast Texas and Gulf Coast region.

Formerly Benton Oil and Gas. Operating mainly in Venezuela and Russia.

Provides marine construction services to the offshore oil and gas industry primarily in Gulf of Mexico. (Nasdaq: HOFF).

Exploring offshore Gulf of Mexico, Louisiana and Texas Gulf Coast. Also West Texas/southeast New Mexico.

Operating on the Norwegian continental shelf. Company also operates in Angola, Canada, Libya and Russia, with prospects in Iran and the Mexican Gulf.

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 )

Astralian company, operating in the Cooper-Eromanga and Surat-Bowen Basins of Queensland, Australia.

New Zealand company, operating in the Austral-Pacific region.

Focusing on coalbed methane. Properties in Green River Basin of Wyoming and elsewhere. Also provide oilfield services in Kansas, Oklahoma, Missouri, and Wyoming.

Operates on the Blackfeet Indian Reservation in northern Montana.

Operating in the D-J Basin, Gulf Coast, and Rocky Mountain regions of the United States.

Explores for and develops oil and natural gas properties and acquires interests in oil and gas leases. (Nasdaq: KEST).

A US-registered company, operating in the Western Siberian basin of the Russian Federation.

Operating in Victoria, South Australia and Queensland.

Subsiderary of Lukoil that is responsible for managing the company's international oil and gas projects.

Swedish company operating in Sudan and Iran.

Explores for, develops and produces oil and gas. (Nasdaq: MPET).

Oil and gas producer. Based in Irving, TX 75039, USA. (NYSE:MHR; AMEX:MHR.WS.A)

Operations in Texas, Louisiana, Oklahoma, New Mexico, and Mississippi.

Operating primarily in Saskatchewan, Canada. Also provides third party management of hydrocarbons operations.

Operating offshore in the Gulf of Mexico and onshore in the Gulf Coast area.

Family-run company with 22 employees producing oil in Pennsylvania.

Operating in the Permian basin, east Texas, Gulf coast, and off-shore Gulf of Mexico.

Operating in Alberta and Kansas.

Operating in West Virginia and Pennsylvania.

Large operations in the Gulf of Mexico, also operating onshore in Gulf Coast region, the Anadarko basin, and off-shore Australia and China.

Subsidiary of International Firm. Operating mainly in Canada and Gulf of Mexico.

Explores, develops and produces natural gas and oil. (Nasdaq: NCEB).

Operating in the north and west of Australia.

Canadian company exploring in Texas and Alabama.

A company that deals exclusively with the exploration and production of petroleum in the areas of South-East Asia, Australia, the Middle East and North Africa.

Independent with North America onshore, Gulf of Mexico and international operations.

Involved in oil and gas production, natural gas processing, gathering, storage and transmission in the mid-continent areas of the United States. Furthermore marketing and trading of natural gas. Based in Tulsa, OK 74102, USA. (NYSE:OKE)

Proposing to build a heavy oil (bitumen) recovery and upgrading project near Fort McMurray, Alberta. Comments, questions and opinions are invited.

Energy company actively engaged in the exploration and development of a suite of oil prospects situated on Yemen's Red Sea coast proximate to the Saudi Arabian border.

Exploring and producing in western Canada. Also involved with ethanol production.

Australian mining company with projects in the Taranaki and Carnarvon Basin.

Operating in Australia, New Zealand and Africa.

Acquires, explores for, develops, produces and sells crude oil and natural gas. (Nasdaq: PLLL).

Performs onshore contract drilling of oil and gas wells. (Nasdaq: PTEN).

Operates in western Pennsylvania and West Virginia. Investors can participate in drilling partnerships.

Currently developing oil and gas reserves within the Texas Gulf Coast, Mississippi Salt Basin and the Wyoming Big Horn Basin.

Explores and develops oil and gas producing properties onshore and offshore in the Gulf Coast region. (Nasdaq: PQUE).

UK based exploration and production, asset management and consulting company.

Large independent with operations in the United States, Canada, Argentina, South Africa, Gabon and Tunisia.

Exploration and production operations in UKCS, Albania, Indonesia, Myanmar and Pakistan.

Holding company with subsidiaries which acquire, explore for, develop and produce crude oil and natural gas. (Nasdaq: PENG).

Canadian company, operating in China.

Operating in British Columbia, Alberta, and Northwest Territories.

An energy developer engaged in oil and gas exploration and production, gas processing and gathering, gas and liquids trading, interstate gas transmission and storage, retail gas distribution, and telecommunications and information technologies. (NYSE: STR)

Operating in Arkansas, Kansas, Oklahoma, Texas, and Utah.

Producing natural gas in Alberta, Canada.

Performs real estate finance and equipment leasing. Owns energy operations, including natural gas and oil production. (Nasdaq: REXI).

Primary objective is exploring for, developing and producing hydrocarbons in western Canada. Based in Alberta.

Oil and gas exploration, production and agricultural operations. Based in Amarillo, Texas.

Ridgeway Petroleum is currently developing a significant CO2 and helium discovery in Arizona. This accumulation may make Ridgeway one of the North America's largest producers of those gases.

Emphasizes horizontal drilling and 3D seismic in stratigraphically trapped accumulations. Has interests in 6 trends in West Texas, Oklahoma, West Virginia and New York. Requires Java 2 plug-in.

Explores for, develops and produces oil and natural gas. (Nasdaq: ROYL).

Operates in the Permian basin.

Focused on exploration, reservior optimization, and acquisitions. Operating mainly in South Texas and Gulf of Mexico.

Explores for, and develops oil and natural gas properties. (Nasdaq: STOSY).

Production and reserves primarily in Russia. UK production also.

Production in Yemen, Mongolia, Russia and Tunisia. Exploration in SE Asia. Headquarters in United Kingdom.

Generate, market and manage international upstream oil and gas projects and property acquisitions, including both industry and government oil companies.

Exploration and enhanced recovery in Anadarko, Williston, and Permian basins. Also Arklatex area, West Texas and coastal Louisiana.

Holds equity interest in Gulf of Mexico gas leases. Exploring offshore Philippines.

Provides contract sub-sea engineering, survey and construction services to cover all phases of offshore oil and gas operations from exploration to decommissioning. (Nasdaq: SCSAY).

Independent oil and gas company.Includes corporate profile, investor information, and areas of operation. ( NYSE:SGY )

Australian company seeking oil, gas and coalbed methane in six Australian sedimentary basins.

Mines and sells oil and gas, operates retail shops under Sunoco brand, and supplies energy, both from oil/gas and renewable sources. Based in Calgary, Alberta, Canada T2P 2V5. (TSX:SU; NYSE:SU)

Oil and natural gas producer with operations in the USA and New Zealand. Based in Houston, TX 77060, USA. (NYSE:SFY; PCX:SFY)

Independent oil and gas exploration and production company. Includes corporate, financial, and investor data, company news, operating areas, and careers. ( NYSE: TLM )

Developing/redeveloping Lost Hills Field in Kern Co., California. Based in Canada.

Calgary-based private junior oil and gas exploration and production company.

Swedish-base exploration and production company operating in Spain, Denmark, and Turkey.

Explores for, develops, and produces oil and natural gas. (Nasdaq: TXLI).

Operates in south Louisiana, southeast Texas, and the Gulf of Mexico.

Operates in Tennessee. Also manages producing properties.

Explores for, acquires, develops, produces and sells crude oil and natural gas. (Nasdaq: TMBR).

Produces oil and gas through the ownership of mineral and royalty interests and working interests in mineral properties. (Nasdaq: TRGL).

Family owned businesses dealing with oil and gas exploration, drilling, brokerage, trucking and ranching.

UK registered, operating in India, Africa, and in Europe.

Focus in Manitoba, Saskatchewan, and Alberta, Canada. Operates approximately 300 wells.

Operates in western Canada.

Independent oil and gas exploration and production companies. Features corporate profile, investor information, environment responsibilities, and company news. (NYSE: UCL)

Exploration in Rockies, Gulf Coast, Guatemala, and Belize.

Operating in Illinois, Kentucky and Indiana.

Exploring oil and gas reserves in western Canada.

Operates in Texas and Louisiana.

Operating in Western Canada. Features underbalanced horizontal drilling and patented bitumen recovery technologies.

Gas production, pipelining, reserve acquisitions and marketing in the Appalachian Basin.

Operates mainly in SE Texas.

Focusing on the Mid-Continent and Gulf Coast regions. Houston, Texas company.

Operating in the Alberta, Williston, Permian, Anadarko, East Texas and south Florida basins.

Dallas-based company with properties in Israel. Shares production revenues to support Jewish and Christian charities.