Oil and gas - oil and gas producers companies

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Bankers Petroleum Ltd. Connacher Oil and Gas Limited
Cequence Energy Ltd. Open Range Energy Corp.
Delphi Energy Corp. Fairborne Energy Ltd.
Antrim Energy Inc. BNK Petroleum Inc.
Anderson Energy Ltd. Tethys Petroleum Limited
Sonde Resources Corp. Caspian Energy Inc.
Chinook Energy Inc. Condor Petroleum Inc.
Bengal Energy Ltd. WesternZagros Resources Ltd.
Iona Energy Inc. Caza Oil & Gas, Inc.
Saccharum Energy Corp. Freehold Royalties Ltd.
Argosy Energy Inc. Alberta Oilsands Inc.
Pennine Petroleum Corporation EnCana Corporation
Advantage Oil & Gas Ltd. Talisman Energy Inc.
Calvalley Petroleum Inc. TriOil Resources Ltd.
Nexen Inc. Greenfields Petroleum Corporation
Celtic Exploration Ltd. Sagres Energy Inc.
Gran Tierra Energy Inc. Arsenal Energy Inc.
Arcan Resources Ltd. Petro Vista Energy Corp.
Enerplus Corporation Dundee Energy Limited
Canadian Natural Resources Limited Greenlight Resources Inc.
Crew Energy Inc. Vecta Energy Corporation
Cenovus Energy Inc. Sahara Energy Ltd.
Gran Tierra Exchangeco Inc. Athabasca Oil Sands Corp.
Bolivar Energy Corp. Canadian Oil Sands Limited
Primary Petroleum Corporation Equal Energy Ltd.