Energy - Operates primarily in California. Also pursuing exploration in Wyoming, Texas, Louisiana and shallow Gulf of Mexico. Brigham Exploration Company - Operates in Oklahoma, West Texas and onshore Gulf Coast. Emphasizes use of seismic imaging techniques. Cairn Energy PLC - International operator.
Current operations are primarily in the North Sea and the Indian Subcontinent.
Based in Scotland. Century Exploration Company - Exploration and production in Gulf of Mexico, South Louisiana, Mississippi and Texas. Company has a concession in the Dutch North Sea. Comstock Resources, Inc. - Independent oil and gas exploration and production company based in Frisco, Texas. Operates in TX and LA Gulf Coast.