101 Energy Corporation → Same (Subsid: Crawley Petroleum Corporation)
1400 Corp. → Conquest Exploration Company
201 Corporation → Centurion Corporation
3300 Corp. → Conquest Exploration Company
3DX Technologies Inc. (Houston) → Esenjay Exploration Inc.
3Tec Energy Corp. → Same (Houston)
906 Olive Corporation → Same (Affil: Meridian Oil, Inc.)
A & J Oil Company → Thomas, Nelson R.
A & K Petroleum Company → Kerr-McGee Corporation
A. F. D. Capital Group Inc. → Same
A-1 Bit & Tool → Same (Subsid: Homco International, Inc.
A-2 Acquisitions Partnerships (1996 & 1997) → Dissolved into (A-2 Resources Corp.)
A-2 Development and Production Company → Same (Subsid: A-2 Resources Corp.)
A-2 Energy and Exploration Partners, LLC → Same (Subsid: A-2 Resources Corp.)
A-2 Exploration Corp. → Same (Subsid: A-2 Resources Corp.)
AA Development Corporation → AA Energy Corporation
AA Energy Corporation → Same
AA Minerals Corporation → Supron Energy Corporation
Aaron Oil Corporation → Altmark Energy Inc.
Abaca Oil Company → Mapco Production Company
Abacan Resource Corp. → Same
Abbeville Operating Corp. → Bintliff, D.C.
Aberdeen American Petroleum Company, Inc. → Same
Aberdeen Oil & Gas Corporation → Aberdeen Petroleum Corporation
Aberdeen Petroleum Corporation → Adobe Royalty, Inc.
Abney Oil Co. → P & O Falco, Inc.
Abraxus Petroleum Corporation → Same
Acacia Natural Gas Corporation → Same (Subsid: DevonEnergy Corp)
Acadi Energy Company → Oxoco, Inc.
Acadian Gas GP → Tejas Gas
Access Energy Corp. → Enron Gas Service Corp.
Acquisition - VI Corporation → Louis Dreyfus Natural Gas Corp.
Ada Belle Oil Company → Penn-Virginia Resources Corp.
ADA Resources Corp. → Adams Resources & Energy, Inc.
Adams Resources & Energy, Inc. → Same
Addax Petroleum Corporation → Same
Addington Brothers Mining Co. → Ashland Oil, Inc.
Adena Exploration → Dissolved (See notes in back)
Adobe Acquisition Corp. → High Plains Oil Corporation
Adobe Oil and Gas Corp. → Adobe Royalty, Inc.
Adobe Resources Corporation → Santa Fe Energy Resources, Inc.
Adobe Royalty, Inc. → Adobe Resources Corporation
AEC Gas Company → Encana Corp
AEC Gulf of Mexico Inc. → Encana Corp
AEC Oil and Gas (USA) Inc. → Encana Corp
AETNA Oil Co. → Ashland Oil & Refining Company
Agate Petroleum Inc. (N. Dakota Properties) → Nance Petroleum Corporation
Agate Petroleum, Inc. → St. Mary Land & Exploration Company (all US properties except N. Dakota)
AGM Corp. → Diamond Shamrock, Inc.
Aikman Brothers, Inc. → Same