Noble Energy, Inc. was founded in 1932 and is based in Houston, Texas. Noble Energy, Inc., through its subsidiaries, engages in the acquisition, exploration, development, production, and marketing of crude oil, natural gas, and natural gas liquids in the United States and internationally. Noble Energy, Inc. operates and holds interests in properties, including Wattenberg field and Piceance basin located in Colorado; San Juan basin in northwestern New Mexico and southwestern Colorado; Niobrara field in the tri-state area (eastern Colorado, extending into Kansas and Nebraska); Bowdoin field in north central Montana; and the Wind River basin in central Wyoming. Noble Energy, Inc. also holds properties in Texas, Panhandle, Oklahoma and Kansas deepwater Gulf of Mexico, Louisiana, Illinois, Indiana, and other areas. Noble Energy also operates in Equatorial Guinea and Cameroon in West Africa, the North Sea, Israel, Ecuador, China, and Suriname.

Oakridge Energy, Inc. was founded in 1969 and is based in Wichita Falls, Texas.Oakridge Energy, Inc. engages in the exploration for, development, production, and sale of oil and gas primarily in Texas. Oakridge Energy, Inc. owns a 25% working interest in the BSR field consisting of 23 producing wells in Madison County, Texas. Oakridge Energy, Inc. also owns interest in a gravel property, which consists of gas, coal, and other mineral deposits on approximately 63.5 acres of land in La Plata County, Colorado. As of February 28, 2009, Oakridge Energy, Inc. owned working and overriding royalty interests in 8,884 gross acres of developed oil and gas leases, and 51 gross productive oil and gas wells.

Occidental Petroleum Corporation was founded in 1920 and is based in Los Angels, California.Occidental Petroleum Corporation, together with its subsidiaries, operates as an oil and gas exploration and production company. Occidental Petroleum Corporation has three segments: Oil and Gas; Chemical; and Midstream, Marketing, and Other. The Oil and Gas segment engages in the exploration, development, production, and marketing of crude oil, natural gas liquids, and condensate and natural gas in Texas, New Mexico, California, Kansas, Oklahoma, Utah, and Colorado, as well as in Argentina, Bolivia, Colombia, Libya, Oman, Qatar, the unite Arab Emirates, and Yemen. As of December 31, 2008, Occidental Petroleum Corporation had proved reserves of approximately 2,978 million barrels of oil equivalent. The Chemical segment manufactures and markets basic chemicals, vinyls, and performance chemicals. The Midstream, Marketing, and Other Segment gathers, treats, processes, transports, stores, trades, and markets crude oil, natural gas, natural gas liquids, and condensate and carbon dioxide, as well as generates and markets power. In addition, Occidental Petroleum Corporation involves in the calcium chloride business.

Panda Energy has a twenty-five year track record of success in building large-scale, state-of-the-art power generation facilities.Panda Energy International develops, owns, and operates clean, low-cost power plants. The company has built more than 9,000 MW of electric generation capacity in the US. Panda Energy has sold its interests in four gas-fueled power plants in Arkansas, Arizona, and Texas to TECO Energy, and its stakes in projects in China and Nepal. Panda Energy has built the two largest gas-fueled, combined-cycle independent electric generation facilities in the US, totaling 4,500 MW of generating capacity. CEO Bob Carter and his wife, EVP Janice Carter, own a controlling stake in Panda Energy, which they founded in 1982.

Panhandle Oil and Gas Inc. engages in the acquisition, management, exploration, and development of oil and natural gas properties. Panhandle Oil and Gas Inc. holds properties and other oil and gas interests primarily in Arkansas, Kansas, Oklahoma, New Mexico, and Texas, the United States. As of September 30, 2009, Panhandle Oil and Gas Inc. had working and/or royalty interests in 4,861 producing oil and natural gas wells, as well as in 40 wells that were in the process of drilling or completion. Panhandle Oil and Gas Inc. customers include pipeline and marketing companies. Panhandle Oil and Gas Inc. was formerly known as Panhandle Royalty Company and changed its name to Panhandle Oil and Gas Inc. in March 2007. Panhandle Oil and Gas Inc. was founded in 1926 and is based in Oklahoma City, Oklahoma.

Penn Virginia Corporation was founded in 1882 and is headquartered in Radnor, Pennsylvania with its additional offices in Oklahoma, Tennessee, Texas, and West Virginia.Penn Virginia Corporation is an independent oil and gas company primarily engaged in the development, exploration and production of natural gas and oil through our wholly owned subsidiary, Penn Virginia Oil & Gas Corporation, or PVOG. Penn Virginia Corporation also own partner interests in Penn Virginia Resource Partners, L.P., (NYSE: PVR), which is involved in the coal and natural resource management and natural gas midstream businesses, and Penn Virginia GP Holdings, L.P., or PVG, which owns PVR’s general partner.We have a geographically diverse asset base with core areas of operation in the East Texas, Mid-Continent, Appalachian, Mississippi and Gulf Coast regions of the United States. As of December 31, 2008, Penn Virginia Corporation had proved natural gas and oil reserves of approximately 916 Bcfe, of which 82% were natural gas and 51% were proved developed, with an SEC pre-tax PV-10 value of $908.0 million and standardized measure of discounted future net cash flows of $729.4 million.

Petroleum Development Corporation was founded in 1955 and is based in Denver, Colorado.Petroleum Development Corporation engages in the exploration, development, production, and marketing of oil and natural gas. Petroleum Development Corporation also specializes in the purchase, aggregation, and resale of natural gas from other producers. As of December 31, 2008, Petroleum Development Corporation owned interests in approximately 4,712 gross wells located primarily in the Rocky Mountain Region, and the Appalachian and Michigan Basins with 753 billion cubic feet equivalent of net proved oil and natural gas reserves. Petroleum Development Corporation sells natural gas to other gas marketers, utilities, industrial end-users, and other wholesale gas purchasers.

PetroQuest was founded in 1985 as a Gulf Coast oil and gas company. From 1985 to 2002 PetroQuest grew its reserves to 69 Bcfe located principally onshore in Louisiana and offshore in the Gulf of Mexico. In 2003, PetroQuest implemented an asset diversification strategy to balance its Gulf Coast and Gulf of Mexico operations with longer lived, lower risk onshore properties. Using the cash flow generated from its Gulf Coast Basin assets, PetroQuest has expanded its asset portfolio to include properties in the Woodford and Fayetteville Shale plays in the Arkoma Basin and it has acquired a significant position in the East Texas Basin where it is pursuing both oil and gas potential.The strategy has yielded results as PetroQuest has more than doubled reserves since 2002 to 157 Bcfe while production has increased an average of more than 18% per year to 31 Bcfe in 2007. PetroQuest Energy, Inc. is now focused on expanding its onshore operations with approximately 75% of its $230 million 2008 capital expenditure budget allocated to East Texas and the Arkoma Basin.

Pioneer Natural Resources Company was founded in 1997 and is headquartered in Irving, Texas. Pioneer Natural Resources Company engages in the exploration and production of oil and gas in the United States, South Africa, and Tunisia. Pioneer Natural Resources Company produces crude oil, natural gas, and natural gas liquids. Pioneer Natural Resources Company primarily holds interests in the Spraberry field in the Permian Basin area; the Hugoton and West Panhandle fields in the Mid-Continent area; and the Raton field in the Rocky Mountains area. As of December 31, 2008, Pioneer Natural Resources Company had proved undeveloped reserves and proved developed reserves of approximately 246 million barrels of oil and natural gas liquids; and 1,064 billion cubic feet of gas.

Plains Exploration and Production Company was founded in 2002 and is based in Houston, Texas. Plains Exploration & Production Company engages in the acquisition, development, exploration, and production of oil and gas properties primarily in the United States. Plains Exploration and Production Company owns interests in various oil and gas properties located in the Onshore and Offshore California; the Gulf of Mexico; the Gulf Coast Region, including the Haynesville Shale and South and East Texas; the Mid-Continent Region; and the Rocky Mountains, as well as an interest in an exploration prospect offshore Vietnam. As of December 31, 2008, Plains Exploration and Production Company had proved reserves of approximately 292.1 million barrels of oil equivalent.

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