Oil Companies



Qatar Petroleum Company


Quicksilver Resources

 Our company is widely recognized as a leader in the development and production of unconventional resources, including coal bed methane, shale gas, and tight sand gas in North America.




Ram Energy Resources

We are an independent oil and natural gas company engaged in the acquisition, development, exploitation, exploration and production of oil and natural gas properties, primarily in Texas, Louisiana and Oklahoma. Our producing properties are located in highly prolific basins with long histories of oil and natural gas operations. We have been active in our core producing areas of Texas, Oklahoma and Louisiana since our inception in 1987 and have grown through a balanced strategy of acquisitions, development and exploratory drilling. We have completed over 24 acquisitions of producing oil and natural gas properties and related assets for an aggregate purchase price in excess of $700.0 million. On November 29, 2007, we acquired Ascent Energy in a cash and stock transaction valued at $303.8 million. Through December 31, 2010, we have drilled or participated in the drilling of over 846 oil and natural gas wells, approximately 94% of which were successfully completed and produced hydrocarbons in commercial quantities. Our management team has extensive technical and operating expertise in all areas of our geographic focus.


Range Resources

Range Resources Limited (“Range” or the “Company”) is an oil and gas exploration, development and production company, which is dual-listed on the ASX (RRS) and AIM (RRL).Its principal activities are directed towards finding and delineating hydrocarbons with interests in Puntland, Somalia; the Republic of Georgia, onshore Texas, USA and Trinidad.


Repsol YPF


Rex Energy Corp.

Rex Energy Corporation is an independent energy company engaged in the acquisition, production, exploration and development of oil and gas, with properties concentrated in the Appalachian Region, Illinois Region and Rockies Region. We pursue a balanced growth strategy of exploiting our sizeable inventory of lower risk developmental drilling locations, pursuing our higher potential exploration drilling prospects and actively seeking to acquire complementary oil and natural gas properties. Our success is the result of the Company's seasoned and diversified management team comprised of expert personnel, using the latest technologies, and sound business practices.


Rio Petroleum

Rio Petroleum, Inc. began doing business in 1979, as the operating company of Barrett W. Pierce.  RIO, a Texas Corporation, is a regional oil and gas operator based in Amarillo. RIO currently serves as operator of producing oil and gas leases in Texas and Oklahoma.  The company has a full-time staff and several part-time employees and consultants.  RIO's staff devotes its time to the physical and administrative operation of the leases and to the evaluation and completion of new oil and gas related



 Roc Oil Company Limited (ROC) is one of Australia's leading independent upstream oil and gas companies. Incorporated in Australia, ROC listed on the Australian Securities Exchange (ASX) in 1999. ROC currently has approximately 713 million shares on issue. The company has a global workforce of approximately 180, located mainly in the Sydney and Beijing offices.


Rock Energy Inc.


Rosetta Resources

 Rosetta Resources is an independent oil and gas company based in Houston, Texas engaged in the exploration, development and exploitation of onshore energy resources in the United States of America. Our largest producing area is located in the Eagle Ford shale in South Texas and we hold a large exploratory position in the Southern Alberta Basin in northwest Montana.




Royal Dutch/Shell



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