Proven Reserves proudly includes the following companies as its among its past clients:

• Abacus Management Corporation
• Advantage Oil & Gas Ltd.
• Anderson Energy Ltd.
• Anterra Corporation
• Anegada Energy Corp.
• Apache Canada Ltd.
• Aquest Energy
• Arc Resources Ltd.
• Arcan Resources Ltd.
• Arsenal Energy Inc.
• Athabasca Oil Sands Corp.
• Athlone Energy Ltd.
• Barnwell of Canada
• Barrick Energy Inc.
• Baytex Energy Ltd.
• Birchcliff Energy Ltd.
• Black Pearl Resources Inc.
• Bear Ridge Energy Inc.
• Bonavista Petroleum Corporation
• Bonterra Energy Corp.
• Bow Valley Energy Ltd.
• BP Caanada Energy Group ULC
• Brion Energy Corporation
• Buffalo Resources Corp.
• Burmis Energy Inc.
• Caltex Energy Inc.
• CalValley Petroleum Inc.
• Canadian Forest Oil Ltd.
• Canadian Natural Resources Ltd.
• Canoil Ltd.
• Cenovus Energy Inc.
• Clear Energy Inc.
• Connacher Oil and Gas Ltd.
• ConocoPhillips Canada
• Crispin Energy Inc.
• Culane Energy Ltd.
• Cyries Energy Inc.
• Daylight Energy Trust
• Delphi Energy Corp.
• Devon Energy Corp.
• Diaz Resources Ltd.
• Dover Operating Corp.
• Emerald Bay Energy Inc.
• EnCana Corporation
• Enerplus Resources Corporation
• EOG Resources Canada Inc.
• Esprit Exploration Ltd.
• ExAlta Energy Inc.
• Excite Energy
• First Calgary Petroleums Ltd.
• Fairborne Energy Ltd.
• Galleon Energy
• Gentry Resources Ltd.
• Glenogle Energy Inc.
• Grand Petroleum Inc.
• Grey Wolf Exploration Inc.
• Hanna Oil & Gas Company-Canada ULC
• Harvest Operations Corp.
• Hawker Resources Inc.
• Hunt Oil Company of Canada, Inc.
• Husky Oil Operations Ltd.
• Japan Canada Oil Sands Limited
• Kelso Energy Inc.
• Kensington Energy Ltd.
• Kereco Energy Ltd.
• KKD Oil Sands Partnership
• Koch Exploration Canada, L.P.
• Kootenay Energy Inc
• MacKay Operating Corp.
• Magellan Resources Ltd.
• MEG Energy Corp.
• Monterey Exploration Ltd.
• Murphy Oil Company Ltd.
• Mustang Resources Inc.
• NAL Resources Management Ltd.
• Navigo Energy Inc.
• Nexen Inc.
• Northern Blizzard Resources Inc.
• Northrock Resources Ltd.
• Outlook Energy Ltd.
• Outrider Energy Ltd.
• P Burns Resources Ltd.
• Paramount Resources Ltd
• Pearl E&P Canada Ltd.
• Pengrowth Corporation
• Penn West Petroleum Ltd.
• Petro-Canada Oil and Gas
• Petro-Reef Resources Ltd.
• Petrofund Energy Trust
• Peyto Exploration & Development Corp.
• Polar Star Canadian Oil & Gas, Inc.
• Prendegast Petroleum Ltd.
• Progress Energy
• Questerre Energy Corporation
• Regent Resources Ltd.
• Response Energy Corp
• Revolve Energy Inc.
• Rock Creek Resources Ltd.
• Rockyview Energy Inc.
• Rolling Thunder Exploration Ltd.
• Rustler Petroleum Inc.
• Sawtooth International Resources Inc.
• Seneca Energy Canada
• Shell Canada Energy
• Sinopec Daylight Energy Ltd.
• Shiningbank Energy Ltd.
• Statoil Canada Ltd
• Suncor Energy Inc.
• Tajzha Ventures Ltd.
• Taqa North Ltd.
• Trident Exploration Corp.
• True Energy Inc.
• TSO Energy Corporation
• Tusk Energy Corporation
• Val Vista Energy Ltd.
• Vermillion Resources Ltd.
• Vero Energy Inc.
• Winstar Resources Ltd.
• Whitehall Energy Ltd.