Woburn Energy (formerly Black Rock Oil & Gas) is an oil and gas explorer which focuses its efforts on exploring in areas where commercial discoveries can be rapidly developed. Woburn Energy Plc is currently active in Colombia, and the UK North Sea. Woburn Energy had exploration acreage in Australia and Ireland but has exited those areas in order to focus on its core Colombia and UK assets. In 2008 Woburn Energy Plc tested for heavy oil at its Acacia Este exploration prospect in Colombia. Following re-completion, the well produced 40 barrels of oil a day in a long-term production test. In the UK Woburn Energy has a 15% stake in a block in the undeveloped but hydrocarbon-rich Monterey gas field in the Southern North Sea. Woburn Energy Plc’s strategy is to acquire low risk opportunities with a high chance of early success leading to production. This entails a current focus on projects in politically stable, financially attractive countries in Europe and South America. The management aim is to acquire, explore and appraise high potential in these core regions, to strive for near-term production and build Woburn Energy Plc on a solid financial basis.

Doyon, Limited, the doyenne of a Native American-owned corporations, is the largest private landowner in Alaska, controlling 12.5 million acres. Doyon, Limited has five businesses with diversified interests, including tourism (Doyon Tourism), oil exploration services (Doyon Drilling), catering, security services, and facility maintenance (Doyon Universal Services), commercial property management (Doyon Properties), and natural resource management (Doyon Lands and Natural Resources). The Doyon Foundation promotes health, education, and economic development of native Alaskans.

Aspen Exploration Corporation was founded in 1979 and is based in Denver, Colorado.Aspen Exploration Corporation does not have significant operations. Aspen Exploration Corporation intends to seek possible business combinations with third parties. Prior to June 30, 2009, Aspen Exploration Corporation engaged in the acquisition, exploration, and development of oil and gas properties in California and Montana, the United States.

Enterra Energy Trust was founded in 1998 and is headquartered in Calgary, Canada with an additional office is in Carney, Oklahoma. Enterra Energy Trust, an open-end unincorporated investment trust, through its subsidiaries, engages in the exploration for and production of oil and gas in Canada and the United States. Enterra Energy Trust holds interests in various properties, including Clair, Provost-Alliance-Wainwright, Princess, and Ricinus in Alberta; Desan in British Columbia; and Liebenthal in Saskatchewan. Enterra Energy Trust also owns interests in properties located in Grant, Lincoln, and Logan counties in Oklahoma. As of December 31, 2008, Enterra Energy Trust had proved and probable reserves of 26,699 mboe.

E1 is A-1 in LPG supply to Korea. The company provides about half of South Korea's annual liquid propane gas imports. E1 Corp. purchases LPG from other countries (mainly Saudi Arabia) and stores it in two domestic terminals. LPG products are then distributed nationally to gas stations, bottling stations, gas retailers, industrial users, and residential users. E1 also exports LPG throughout Asia. E1 Corp. operates six domestic branches as well as two storage terminals, and more than 220 refueling stations. Outside of Korea E1 has offices in Bahrain and Indonesia.

Bucking Horse Energy Inc. is a public company listed on the Toronto Stock Exchange. The company's business is focused on the exploration, development, and production of natural gas and natural gas liquids at its Pinedale Anticline natural gas properties in southwest Wyoming. Bucking Horse Energy has proved plus probable net reserves of 291 billion cu. ft. of natural gas equivalent. In 2008 Gemini Energy (the parent of Arrowhead Resources) was acquired by NRG Investments (which subsequently changed its name to Bucking Horse Energy).

Double Eagle Petroleum Co. was founded in 1972 and is headquartered in Casper, Wyoming.Double Eagle Petroleum Co., an energy company, engages in the exploration, development, production, and sale of natural gas and crude oil primarily in the Rocky Mountain Basins of the western United States. The company's principal properties include the Atlantic rim coal bed natural gas project located in south central Wyoming; the Pinedale Anticline property in the Green River basin of Wyoming; the Wind River basin in central Wyoming; the Moxa Arch and other areas located in southwest Wyoming; and the Christmas Meadows prospect in Utah. Double Eagle Petroleum Co. also engages in the transportation of gas through its intrastate gas pipeline. As of December 31, 2008, Double Eagle Petroleum Co. had estimated proved reserves of approximately 86.3 billion cubic feet of natural gas and approximately 420 thousand barrels of oil. Double Eagle Petroleum Co. also owned interests in a total of 1,125 producing wells and had an interest in 525,493 gross acres natural gas prone basins of the Rocky Mountains.

Quarles Petroleum, a Mid-Atlantic distributor and retailer of petroleum products. Quarles Petroleum distributes fuel oil, supplies propane, and owns and operates Quarles Fuel Network gas stations and fleet fueling sites in the Mid-Atlantic region of the US. Quarles Petroleum Incorporated operates more than 230 fueling sites in six states, as well as 12 Quarles Food Stores in Virginia. Through its Quarles Energy Services division, Quarles Petroleum Incorporated offers residential and commercial fuel delivery services, heating and air conditioning systems, and air purifier and humidifier installation.

Apache was formed in 1954 with $250,000 of investor capital with the simple concept of becoming a significant and profitable oil company. Today, Apache Corporation is one of the world's top independent oil and gas exploration and production companies. Apache North Sea manages exploration and production activities in the Forties field for its parent Apache Corporation. Apache North Sea began drilling in the field in 2004. A core production area for Apache (averaging 70,000 barrels per day, up from 40,000 a day in 2003), the Forties field has estimated proved reserves of 189 million barrels of oil equivalent. In 2008 Apache North Sea's production of 21.9 million barrels of oil equivalent, accounted for approximately 11% of Apache's total production. In 2009 Apache North Sea Limited boosted output by bringing some seven development wells into production.

Abraxas Petroleum Corporation company was founded in 1977 and is based in San Antonio, Texas. Abraxas Petroleum Corporation (Abraxas) is an independent energy company primarily engaged in the development and production of natural gas and crude oil. At December 31, 2008, the Company’s properties are located in the Rocky Mountain, Mid-Continent, Permian Basin and Gulf Coast regions of the United States. On January 31, 2008, Abraxas Operating , LLC, a wholly owned subsidiary of the Partnership, consummated the acquisition of certain oil and gas properties located in various states from St. Mary Land & Exploration Company (St. Mary) and certain other sellers. In October 2009, Abraxas Petroleum Corporation closed the merger with Abraxas Energy Partners, L.P.

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