In House

Baytex Energy Ltd.
Devon Canada Corp./Anderson Explor.
EnCana Corporation
Enerplus Energy Services Ltd.

EOG Resources Canada Ltd./Enron
Gulf Canada Resources Ltd.
Husky Energy Inc.

Industry

Aera Energy LLC
Alberta Human Resources
Alberta Research Council
AltaGas Services Inc.
Arch Petroleum Ventures
BP Canada Energy Company

Barnwell of Canada Limited
Calpine Canada
Canadian Natural Resources
Computer Modelling Group
ConocoPhillips Canada

ADMA-OPCO (Abu-Dhabi)
Greater River Nile Petroleum (Sudan)
Canadian Petroleum Institute (Peru)
Chauvco Resources Ltd.
Qatar Petroleum (Qatar)

Nexen Petroleum International Ltd.
Rio Alto Resources International Inc.
Sonatrach- Naftogas (Algeria)
Tanzanian Petroleum Development Corporation (Tanzania)