Cabot Oil & Gas Corporation
Operating in the onshore Texas and Louisiana Gulf Coast, Rocky Mountains, Appalachia and Mid-Continent.
Cairn Energy PLC
International operator. Current operations are primarily in the North Sea and the Indian Subcontinent. Based in Scotland.
Callon Petroleum Company
Operations in Louisiana, Alabama and offshore Gulf of Mexico.
Canada Southern Petroleum, Ltd.
Calgary-based exploration company, operating in several western provinces, the Yukon and Northwest Territories and Canada's Arctic Islands.
Century Exploration Company
Exploration and production in Gulf of Mexico, South Louisiana, Mississippi and Texas. Company has a concession in the Dutch North Sea.
Chevron Corp.
Produces and refines oil. Includes product information, community programs and learning center.
Chroma Energy, Inc.
Utilizing proprietary seismic pattern imaging technology in parnerships with exploration organizations.
Clayton Williams Energy
Operates primarily in Texas, Louisiana and New Mexico. The company has expertise with horizontal drilling and the use of 3-D seismic.
Compton Petroleum Ltd.
Calgary-based independent operating in Western Canada.
Comstock Resources, Inc.
Operating in Texas, Louisiana, and the Gulf of Mexico.
Continental Energy Corporation
A small independent operator concentrating on Indonesian concessions which total 3.7 million acres.
Credo Petroleum Corporation
Operates in Midcontinent and Rockies. Shelf of Anadarko basin is core area.
Curlew Lake Resources Inc.
Operations in western Canada and the United States.
Cyrus Oil and Gas Company
Operating in west and central Texas, Alabama, and in central California.
D and L Energy, Inc.
Oil and gas exploration, development and marketing in Ohio and Pennsylvania.
Darwin Oil Company
Operates in West Texas and S.E. New Mexico, and internationally in Ecuador and Argentina.
Dave Easom Production Company, Inc.
Exploration and Production operations and consulting in SW Mississippi and N. Central Louisiana.
Defiant Energy Corporation
Operating in Alberta west of the 5th meridian. Main emphasis is natural gas.
Delta Petroleum Corporation
Acquires, explores for, develops and operates oil and gas properties and related business activities. (Nasdaq: DPTR).
Denbury Resources, Inc.
Independent oil and natural gas producer.
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