D

D & G Energy Corp.
D-O-R Engineering Inc.
D.D.D. Inc.
Dallas Operating
Daqing Oil Field Co. Ltd.
Dart Oil & Gas
Davis Brothers LLC.
Davis Operating Co.
DCOR LLC.
Deep Gulf Energy LP.
Deer Valley Ltd.
Dejour Enterprises Ltd.
Delmar Operating Inc.
Denbury Resources Inc.
Destec Energy
Deutsche Bank
Devx Energy Inc.
Diamond Oil & Gas Inc.
Diaz Resource Inc.
Direct Energy Resources
Diverse Offshore LP.
DKM Resources Inc.
DLB International inc.
DLJ Merchant Banking Partners
Doil Oil and Gas Corp.
Dome Investment Group
Dominion Resources
Double B Resources
Dover Investments Ltd.
DRILCorp Energy Ltd.
Dubai Petroleum Co.
Dufco/Williams Technology
Dunhill Resources Inc.
Dynegy Inc.
D & J Oil Co. Inc.
D. C. Dudley & Associates
Daewoo International Corp
Danaher Oil Co.
Dara Petroleum Co.
Dauphin Island Gathering Partners
Davis Gulf Coast Inc.
Daylight Resources Trust Ltd.
DCP Midstream LP.
Deep Well Oil & Gas Inc.
Deerpath Group Inc.
Dekalb Energy Co.
Delta Petroleum Co.
Desarrollo Y Serviciio Petrolero
Destin Energy LLC.
Devon Energy Corp.
DEWBRE Petroleum Corp.
Diasu Oil & Gas Co. Inc.
Dickinson Resources Inc.
Diverse Energy
Divot Energy Corp.
DLA Phillips Fox
DLB Oil & Gas Inc.
Doig River First Nations
Domain Energy Corp.
Dominion Energy Inc.
Dorchester Capital
Double Eagle Petroleum & Mining Co.
Dragon Oil PLC.
DTE Gas & Oil Co.
Dublin International Petroleum
Duke Energy Hydrocarbons
Dynamic Resources Corp.