| 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 Dodsal Group 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. Dunox Oil & Gas Group 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. |