Quicksilver Resources Inc
Primarily engaged in exploration, development and production of unconventional natural gas onshore in North America.
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member
XTO Energy Inc.
Crude Petroleum and Natural Gas; sold to Exxon in 2009
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member
EOG Resources
Formerly Enron; produces crude oil and natural gas. Revenues are $16 billion.
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member
Pioneer Natural Resources Company
Company created by merger of Mesa, Inc. and Parker & Parsley Petroleum Company
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member
Devon Energy Corporation
An independent oil and natural gas exploration and production company.
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member
ConocoPhillips
Texas-based oil and gas corporation
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member
Chesapeake Energy
Natural gas producer
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member
