- ATCO Gas Services Ltd.
 - Provides integrated solutions to your gas gathering, processing and storage needs. - Bissett Resource Consultants Ltd.
- Petroleum engineering company providing engineering services, technical assistance and support.
- BlackRock Ventures
- Junior oil company focused on the exploration, development, and production of heavy oil in western Canada.
- Canadian Natural Resources Limited
- Senior independent oil and natural gas exploration, development, and production company with operations in Western Canada, the North Sea, and offshore West Africa.
- Canadian Superior Energy
- Oil and gas exploration and production company with holdings in offshore Nova Scotia.
- Canam Pipe and Supply
- Sells oilfield equipment worldwide.
- Chevron Canada
- Supplier of gasolines, diesel, jet fuel, and lubricants for consumers as well as commercial and industrial customers.
- Custom Industrial Automation
- Coke drum inspection service for the refining industry.
- Enbridge
- Engaged in the transportation of liquid hydrocarbons and distribution of natural gas.
- EnCana Corporation
- Independent natural gas producer and gas storage operator.
- Enerdata Ltd
- Publishes North American natural gas prices and related market information; we also sponsor two energy conferences: PowerFair & GasFair.
- Enerplus Group
- Invests in mature crude oil and natural gas producing properties located primarily in western Canada.
- Entrerra Energy
- Oil and gas exploration and development in Western Canada.
- Freehold Royalty Trust
- A closed-end investment trust which receives and distributes royalty income from a diversified asset base of oil and gas properties across western Canada.
- Gulf Canada Resources
- Explores for, develops, produces, and markets conventional, heavy and synthetic crude oil, natural gas liquids, and natural gas.
- Hallmark Technical Services
- Supplies a casing and tubular related support system to the oil and gas industry.
- Husky Oil (2)
- Hycal Energy Research Laboratories Ltd.
- Reservoir engineering laboratory focussed on optimizing reservoir production through advanced technologies.
- Imperial Oil
- Producer of crude oil in Canada and refiner and marketer of petroleum products.
- Kildair Service Ltd
- Manufacturing, sale and distribution of marine residual fuels.
- Linpro Petroleum Services Limited
- Provides oil companies, environmental consulting firms, and the private sector with a range of contracting services.
- Mentors, The
- An oil and gas consulting firm that specializes in developing and marketing geological reports, and in training and mentoring services.
- Nexen
- Oil and gas exploration and production company.
- Niko Resources Ltd.
- Nowsco Well Service Ltd.
- Oil Directory, The
- OLCO Petroleum Group Inc.
- Markets refined products and blends of gasoline.
- PanCanadian Energy
- Produces and markets crude oil, natural gas, and natural gas liquids.
- Pembina Pipeline Income Fund
- Generates stable cash distributions for Unitholders from a pipeline transportation network.
- Petro Kazakhstan
- International energy corporation engaged in the exploration, development, production, acquisition, refining, and marketing of oil and refined products in Kazakhstan.
- Petro-Canada (3)
- PrimeWest Energy Trust
- Actively acquires, develops, produces, and sells natural gas, crude oil, and natural gas liquids.
- Raptor Capital Corporation
- Information on corporate strategy focusing on acquisition of oil and gas properties.
- Shell Canada
- Suncor Energy
- Mines and extracts crude oil from the oil sands deposits of northern Alberta. Explores for, develops, and markets natural gas.
- Syncrude Canada Ltd.
- Producer of blended crude oil.
- Talisman Energy
- Internationally diversified oil and gas producer.
- Upton Resources Inc.
- Oil exploration, development and production company with principal operations in southeast Saskatchewan.
- Woodside Research Ltd.
- Specializing in the Canadian oil and gas industry, creators of the CANOIL database.
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