| Amerada Hess Corporation | http://www.hess.com/ |
| Ameritex Minerals, Inc. | http://www.amrtx.com/ |
| Anadarko Petroleum Corp. | http://www.anadarko.com/ |
| Apache Corporation | http://www.apachecorp.com/ |
| ATP Oil & Gas Corporation | http://www.atpog.com |
| Aviara Energy Corporation | http://www.aviaraenergy.com/ |
| Barrett Resources Corporation | http://www.billbarrettcorp.com/ |
| Bellwether Exploration Company | http://www.bellwetherexp.com/ |
| BHP | http://www.bhp.com/ |
| Blue Dolphin Energy | http://www.blue-dolphin.com/ |
| BP Amoco | http://www.bp.com/ |
| Brigham Exploration Company | http://www.bexp3d.com/ |
| Burlington Resources | http://www.br-inc.com/ |
| Cabot Oil & Gas Corporation | http://www.cabotog.com/ |
| Callon Petroleum Company | http://www.callon.com/ |
| Challenger Minerals | http://www.challengerminerals.com |
| Cheniere Energy, Inc. | http://www.cheniere.com/ |
| Chevron | http://www.chevron.com/ |
| Cobalt International Energy, L.P. |
http://www.cobaltintl.com |
| Conoco Inc. | http://www.conocophillips.com/ |
| Devon Energy Corporation/Santa Fe Snyder | http://www.devonenergy.com/
|
|
Dominion (formerly CNG) | http://www.dom.com/ |
| EEX Corporation | http://www.eex.com/ |
| EnCana | http://www.encana.com/ |
| El Paso Energy | http://www.elpaso.com/ |
| Energen Resources Corporation | http://www.energen.com/ |
| Energy Partners, Ltd. | http://www.eplweb.com/ |
| Enterprise Oil | http://www.enteroil.com/ |
| EOG Resources Inc. | http://www.eogresources.com/ |
| Equitable Resources, Inc. | http://www.eqt.com/ |
| Exxon-Mobil | http://www.exxon.mobil.com/ |
| Falcon Seaboard | http://www.falconseaboard.com/ |
| Forcenergy Inc. | http://www.forcenergy.com/ |
| Forest Oil Corporation | http://www.forestoil.com/ |
| Hunt Petroleum Corporation | http://www.huntpetroleum.com/ |
| J. M. Huber Corporation | http://www.huber.com/ |
| LLOG | http://www.llog.com |
| Louis Dreyfus Natural Gas Corp. | http://www.louisdreyfus.com/ |
| Magnum Hunter Production, Inc. | http://www.magnumhunter.com/ |
| Marathon Oil Company | http://www.marathon.com/ |
| Mariner Energy, Inc. | http://www.mariner-energy.com/ |
| McMoran Exploration Co. | http://www.mcmoran.com/ |
| Medallion Oil Company | http://www.medgrp.com/ |
| Mitchell Energy & Development | http://www.mitchellenergy.com/ |
| Murphy Exploration & Production Company | http://www.murphyoilcorp.com/ |
| Newfield Exploration Company | http://www.newfld.com/ |
| Ocean Energy, Inc. | http://www.oceanenergy.com/ |
| Online Resources, Inc. | http://www.onlineresourcesinc.com/ |
| OXY USA Inc. | http://www.oxy.com/ |
| PanCanadian | http://www.pcp.ca/ |
| Pel-Tex Oil Company | http://www.peltex.com/ |
| Pennzoil Oil Company | http://www.pennzoil.com/ |
| Petrobras America Inc. | http://www.petrobras-usa.com/ |
| PetroQuest Energy Inc. | http://www.petroquest.com/ |
| Petsec Energy | http://www.petsec.com/ |
| Phillips Petroleum | http://www.phillips66.com/ |
| Pioneer Natural Resources USA, Inc. | http://www.pioneernrc.com/ |
| Range Resources Corporation | http://www.rangeresources.com/ |
| Samedan Oil Corporation | http://www.samedan.com/ |
| Seneca Resources Corporation | http://www.senecaresources.com/ |
| Shell Oil Company | http://www.countonshell.com/ |
| St. Mary Land & Exploration Company | http://www.stmaryland.com/ |
| Stone Energy Corporation | http://www.stoneenergy.com/ |
| Texaco | http://www.texaco.com/ |
| The Houston Exploration Company | http://www.houstonexploration.com/ |
| Torch Energy Advisors | http://www.teai.com/ |
| TotalFinaElf | http://www.totalfinaelf.com/ |
| Transatlantic Petroleum (USA) Corp. | http://www.tapcor.com/ |
| UNOCAL | http://www.unocal.com/ |
| Vastar Resources, Inc. | http://www.bp.com |
| Wiser Oil Company | http://www.wiseroil.com |
| XTO | http://www.crosstimbers.com/ |
