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. Greenfields Petroleum Corporation
TriOil Resources Ltd. Nexen Inc.
Celtic Exploration Ltd. Sagres Energy Inc.
Gran Tierra Energy Inc. Arsenal Energy Inc.
Arcan Resources Ltd. Canadian Natural Resources Limited
Petro Vista Energy Corp. Enerplus Corporation
Dundee Energy 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.
Parallel Energy Trust Angle Energy Inc.
Twin Butte Energy Ltd. Hermes Financial Inc.
DeeThree Exploration Ltd. PetroBakken Energy Ltd.
Bonavista Energy Corporation Storm Resources Ltd.
Harvest Operations Corp. Canadian Energy Exploration Inc.