- AGIP - www.agip.it
- Alberta Energy Company - www.encana.com
- Altura Energy Ltd - www.alturaenergy.com
- Amadeus - www.amadeuspetroleum.com
- Ambra Resources Group Inc. - www.ambraresources.com
- Amerada Hess Corporation - www.hess.com
- American Shoreline Inc. - www.amshore.com
- Amity Oil NL - www.amityoil.com.au
- Amoco - www.amoco.com
- BP - www.bp.com
- American Shoreline Inc. - www.amshore.com
- Anadarko Petroleum Corporation - www.anadarko.com
- Apache Corporation - www.apachecorp.com
- Aquilo Energy Inc. - www.aquiloenergy.com
- Arc Energy NL - www.arcenergy.com.au
- ARCO - www.arco.com
- Aruba Petroleum Inc. - www.arubapetroleum.com
- Ashland Inc. - www.ashland.com
- Aspen Integrated Oil & Gas LLC - www.flash.net
- ASTRA Argentina - www.astra-capsa.com
- Avid Oil & Gas Ltd. - www.avidoil.com
- Ayrex Resources Ltd. - www.tandem-resources.com
- Barrett Resources Corporation - www.brr.com
- Baytex Energy Ltd. - www.baytex.ab.ca
- Belco Oil & Gas Corp. - www.belcooil-gas.com
- Bellwether Exploration Company - www.bellwetherexp.com
- Benton Oil and Gas Company - www.bentonoil.com
- Benz Energy Ltd. - www.benzenergy.com
- Berkley Petroleum Corp. - www.berkleypete.com
- Berry Petroleum Company - www.bry.com
- Best Pacific Resources Ltd. - www.bestpacific.com
- BG plc - www.bgplc.com
- BHP Petroleum - www.bhp.com.au
- Black Hills Exploration and Production - www.bhep.com
- Black Star Oil Company - www.stormloader.com
- Bligh Oil & Minerals N.L. - www.bligh.com.au
- Blue Dolphin Energy - www.blue-dolphin.com
- BP British Petroleum - www.bp.com
- BP Amoco - www.bpamoco.com
- BRG Petroleum Inc. - www.brgpetr.com
- Brigham Exploration Company - www.bexp3d.com
- British Gas - www.bgplc.com
- Brooklyn Union Group - www.bug.com
- Burlington Resources Inc. - www.br-inc.com
- BXL Energy Ltd. - www.bxlenergy.com
- Cabot Oil & Gas Corporation - www.cabotog.com
- Callon Petroleum Company - www.callon.com
- Camac Holdings Inc. - www.camac.com
- Canada Southern Petroleum Ltd. - www.cansopet.com
- Canadian Hunter Exploration Ltd. - www.chel.com
- Canadian Occidental Petroleum Ltd. - www.cdnoxy.com
- Carmelita Resources Ltd. - www.carmelita.com
- Carnarvon Petroleum NL - www.carnarvon.com.au
- Cedyco Corporation - www.cedyco.com
- Cee Bee Natural Gas Inc. - www.ceebeegas.com
- Centurion Energy International Inc. - www.centurionenergy.com
- CGX Energy Inc. - www.cgxresources.com
- Chesapeake Energy Corporation - www.chesapeake-energy.com
- Chevron Corporation - www.chevron.com
- Chieftain International - www.chieftaininternational.com
- China National United Oil Company - www.chinaoil.net
- Chinese Petroleum Corporation - www.cpc.com.tw
- Clayton Williams Energy Inc. - www.claytonwilliams.com
- CMS Energy Corporation - www.cmsenergy.com
- CNPC - www.cnpc.com.cn
- The Coastal Corporation - www.coastalcorp.com
- Colt Energy Inc. - www.nettune.com
- Conoco Inc. - www.conoco.com
- Conquest Resources Corporation - www.conquest-resources.com
- Consolidated Natural Gas Company - www.cng.com
- Coplex Resources NL - www.coplex.com.au
- Crestar Energy Inc. - www.crestar-energy.com
- Crispin Energy Inc. - www.crispinenergy.com
- Cross Timbers Oil Company - www.crosstimbers.com
- Curlew Lake Resources Inc. - www.curlew-lake.com
- Cypress Energy Inc. - www.cyz.com
- Danoil Energy Ltd. - www.danoil.com
- Daytona Energy Corporation - www.dyt.com.au
- Del Roca Energy Inc. - www.delroca.com
- Denbury Resources Inc. - www.denbury.com
- Devon Energy Corporation - www.devonenergy.com
- Doreal Energy Corporation - www.dorealenergy.com
- Draig Energy Ltd. - www.draigenergy.com
- Ecopetrol - www.ecopetrol.com.co
- Elf Aquitaine - www.elf.fr
- Elf Exploration Inc. - www.elfexp.com
- Elf Petroleum Norge AS - www.elfep.no
- Embassy Oil Company - www.embassyoil.com
- Encal Energy Ltd. - www.encal.com
- Energy Africa - www.energyafrica.com
- ENI - www.agip.it
- Enron Oil & Gas Company - www.eog.enron.com
- Enterprise Oil Plc - www.entoil.com
- Equitable Resourcesm Inc. - www.eri2000.com
- Equity Oil Company Esso - www.equity-oil.com
- Evergreen Resources Inc. - www.evergreen-res.com
- ExxonMobil - www.exxon.com
- Fidelity Oil Group - www.fidelityoil.com
- Fina - www.fina.com
- First Star Energy Ltd - www.firststarenergy.com
- Fletcher Challenge Energy - www.ce.co.nz
- Foreland Corporation - www.foreland.com
- Founders Energy Ltd - www.foundersenergy.com
- FX Energy Inc. - fwww.xenergy.com
- Gain Energy Inc. - www.arctic.net
- Geopetrol - www.geopetrol.fr
- GeoResources Inc. - www.dia.net
- GEOREX S.A. - www.georex.com
- Givot Olam Oil Ltd - www.givot.co.il
- Grantham Resources Inc. - www.cadvision.com
- Gulf Canada Resources Limited - www.gulf.ca
- Gulfstream Resources Canada Limited - www.gur.com
- Hanwha Energy Co. Ltd - www.hec.hanwha.co.kr
- Hindustan Petroleum Corporation Limited (HPCL) - www.hindpetro.com
- The Home-Stake Oil and Gas Company - www.home-stake.com
- The Houston Exploration Company - www.houstonexploration.com
- HS Resources Inc. - www.hsresources.com
- Huber J. M. Corporation - www.huber.com
- Hurricane Hydrocarbons Ltd - www.hurricane-hhl.com
- Husky Oil Ltd Hydro - www.husky-oil.com
- Imperial Oil Ltd. (Esso) - www.imperialoil.ca
- Indo-Pacific Energy Ltd - www.indopacific.com
- INKOMI - www.inkomi.riga.lv
- Integra Resources Ltd - iwww.ntegra-resources.com
- International Rochester Energy - www.rochester-energy.com
- InTerraActive - www.nauticom.net
- Inuvialuit Petroleum Corp - www.inuvialuit.com
- Jay Deason Operating LLC - www.gj.net
- JP Oil - www.jpoil.com
- Juniper Energy L.P. - www.juniperenergy.com
- KCS Energy Inc. - www.kcsenergy.com
- Kerr-McGee Corporation - www.kerr-mcgee.com
- Kestrel Energy - www.kestrelenergy.com
- Korea National Oil Corporation - www.knoc.co.kr
- Kuwait National Petroleum Company - www.knpc.com.kw
- Koch Industries Inc. - www.kochind.com
- Krosno Oil & Gas Enterprise - www.pgnig.com.pl
- Kuwait Oil Company - moc.kw
- Lakes Oil N.L. - www.reflections.com.au
- LAPP Resources Inc. - www.home.gci.net
- Lario Oil & Gas Company - lwww.ario.net
- Lasmo plc - www.lasmo.com
- Louis Dreyfus Natural Gas Corp. - www.ldng.com
- Lukoil - www.lukoil.com
- Lundin Oil AB - www.lundinoil.com
- Magellan Petroleum Australia Limited - www.magpet.com.au
- Magnum Petroleum Inc. - www.magnumhunter.com
- Mantaur Petroleum Corporation - www.mantaur.com
- Manti Resources Inc. - www.mantires.com
- Marathon Oil Company - www.marathon.com
- Maverick Energy Inc. - www.maverickenergy.com
- Maverick Energy & Development Corporation - www.maverickedc.com
- Maxwell Oil & Gas Ltd. - www.maxwelloil.com
- McMoRan Oil & Gas Co. - www.moxy.com
- MDU Resources Group Inc. - www.mdures.com
- M. E. Operating and Services Inc. - www.ruff.com
- Mera Petroleums Inc. - www.mera.ab.ca
- Meridian Resource Corporation - www.tmrc.com
- Mitchell Energy & Development Corp. - www.mitchellenergy.com
- MMS Petroleum PLC - www.netkonect.co.uk
- Mobil - www.mobil.com
- Mosaic Oil N.L. - www.mosaicoil.com
- Mueller Exploration - www.davlin.net
- Murphy Oil Corporation - www.murphyoilcorp.com
- NCE Resources Group - www.nceresources.com
- Neste Group - www.neste.com
- Nevada Manhattan Group Inc. - www.nvmh.com
- New Horizon Exploration Inc. - www.oilandgas.com
- Newfield Exploration Company - www.newfld.com
- Newquest Energy Inc. - www.newquestenergy.com
- Newstar Resources - www.newstarresources.com
- Nido Petroleum - www.socdet.com.au
- Niko Resources Ltd. - www.nikoresources.com
- Norsk Hydro ASA - www.hydro.com
- North Coast Energy Inc. - www.northcoastenergy.com
- Northwest Natural Gas Company - www.gasco.com
- Novus Petroleum Ltd. - www.nvs.com.au
- Nuevo Energy Company - www.nuevoenergy.com
- Numac Energy Inc. - www.numac.com
- Nu-Sky Energy Inc. - www.nu-sky.com
- Occidental Petroleum Corporation - www.oxy.com
- Ocean Energy Inc. - www.oceanenergy.com
- Ocelot Energy Inc. - www.ocelot.ca
- Oil Search Limited - www.oilsearch.com.au
- OMV Aktiengesellschaft - www.omv.co.at
- ONAKO - www.onako.com
- Origin Energy - www.originenergy.com.au
- Oryx Energy Company - www.oryx.com
- Pallister Energy Inc. - www.palliser-energy.com
- PANACO Inc. - www.panaco.com
- PanCanadian Petroleum Limited - www.pancanadian.ca
- PDVSA (Petróleos de Venezuela S.A.) - www.pdv.com
- Pease Oil and Gas Company - www.peaseoil.com
- PEMEX (Petróleos Mexicanos) - www.pemex.com
- Pennzoil Company - www.pennzoil.com
- Peregrine Oil and Gas Limited - www.peregrineoil.com
- Perez Companc S.A. - www.pecom.com.ar
- Petro-Canada - www.petro-canada.ca
- Petroleum Authority of Thailand - www.ptt.or.th
- Petroleum Development Corporation - www.petd.com
- Petrobras (Petróleo Brasileiro S.A.) - www.petrobras.com.br
- Petrofina - www.fina.com
- PETRONAS (Petroliam Nasional Berhad) - www.petronas.com.my
- Petroz NL - www.petroz.com.au
- Petsec Energy Ltd - www.petsec.com
- Phillips Petroleum Company - www.phillips66.com
- Phoenix Resources LLC - www.phoenixresources.com
- Pioneer Oil and Gas - www.piol.com
- Place Resources Corporation - www.place.ca
- PLEXUS Energy Ltd - www.plexusenergy.com
- Poco Petroleums Ltd - www.pocopete.ca
- Power Exploration Inc. - www.titaneng.com
- Prima Energy Corporation - www.primaenergy.com
- Prime West Energy Trust - www.prime-west.com
- Primo Resources Ltd - www.primo-res.com
- Production Gathering Company LLC - www.pgcgas.com
- PTTEP - www.ptt-ep.com
- Pyramid Energy Inc. - www.pyramidenergy.net
- Q Energy Limited - www.q-energy.com
- QGPC (Qatar General Petroleum Corporation) - www.qgpc.com.qa
- Questar Corporation - www.questarcorp.com
- Ramco Energy plc - rwww.amco-plc.com
- Ranger Oil Limited - www.ranger-oil.com
- Rapidfire Resources Ltd - www.rapid-fire.com
- Raptor Capital Corporation - rwww.aptap.com
- REPSOL - www.repsol.es
- Ridel Resources Ltd - www.ridel.com
- ROCO Petroleum Inc. Rosneft - www.rocopetroleum.com
- Royal Dutch / Shell Transport and Trading Group - www.shell.com
- Royale Energy Inc. - www.royl.com
- Ruwco Oil and Gas Corp. - www.ruwco.com
- Sable Offshore Energy Project (SOEP) - www.soep.com
- Saga Petroleum - www.saga.no
- Samson Investment Company - www.samson.com
- Santos - www.santos.com.au
- Sasol Petroleum International Pty Ltd - www.sasol.com
- Saudi Aramco - www.saudiaramco.com
- Scimitar Hydrocarbons Corporation - www.cadvision.com
- Search Energy Corp. - www.searchenergy.com
- Seine River Resources Inc. - www.seineriver.com
- Seneca Resources Corporation - www.natfuel.com
- SERVON Oil Company - www.servon.ru
- Shell - www.shell.com
- Snyder Oil Corporation - www.snyderoil.com
- Solv-Ex Corporation Sonatrach - www.solvex.com
- Southern Mineral Corporation - www.somin.com
- Southward Energy Ltd - www.southwardenergy.com
- Southwestern Energy Company - www.swn.com
- Statoil - www.statoil.com
- Stratic Energy Corporation - www.stratic.com
- Streamline Exploration Inc - www.streamlineexploration.com
- Suncor Energy - www.suncor.com
- Swift Energy Company - www.swiftenergy.com
- Syncrude Canada Ltd - www.syncrude.com
- Synergos International Oil & Gas LLC - fwww.lash.net
- Talisman Energy Inc - www.talisman-energy.com
- Talon Development Company - www.sites.netscape.net
- Talon Production Inc. - www.ruff.com
- Tappit Resources Ltd - www.tappit.com
- Techint Group of Companies - www.techintgroup.com
- Teikoku Oil Co. - www.teikokuoil.co.jp
- Tengasco Inc. - twww.engasco.com
- Tetra Oil Company - www.goldenempire.com
- Texaco Inc - www.texaco.com
- Thunder Energy Inc. - www.thunderenergy.com
- Torch Energy Advisors Incorporated - www.torchroyalty.com
- TOTALFina - www.total.com
- Tracer Petroleum Corporation - www.hostec.com
- Trans-Dominion Energy Corporation - www.tdenet.com
- TransTexas Gas Corporation - www.ttxg.com
- Trinity Energy Resources Inc. - www.trinityenergy.com
- Triton Energy Tyumen Oil - www.tritonenergy.com
- Ulster Petroleums Ltd - www.ulsterp.com
- Ultra Petroleum Corp. - www.ultrapetroleum.com
- Union Pacific Resources Group Inc. - www.upr.com
- Union Texas Petroleum - www.neosoft.com
- Unit Corporation - www.unitcorp.com
- UNOCAL - www.unocal.com
- Upton Resources Inc. - www.uptonres.ca
- U.S. Crude Ltd - www.uscrude.com
- U.S. Energy Corp. - www.useg.com
- U.S. Oil and Gas Inc. - www.usoilgas.com
- Vastar Resources Inc. - www.vastar.com
- Victoria Petroleum N.L. - www.vicpet.com.au
- Vista Energy Resources Inc. - www.vistaenergyresources.com
- Vortex Energy & Minerals Ltd - www.vortexen.com
- Ward Petroleum Corporation - www.wardpetroleum.com
- Wellbid Inc. - www.wellbid.com
- West Oil NL - www.westoilnl.com.au
- Westminster Resources Ltd - www.westres.com
- WhitMar Exploration Company - www.whitmar.com
- The Wiser Oil Company - www.wiseroil.com
- Wolverine Energy Corp. - www.wolverine-energy.com
- Woodside Petroleum - www.woodside.com.au
- YPF - www.ypf.com.ar
- Yukong - www.yukong.co.kr
- Zarara Oil & Gas Limited - www.zararaoil-gas.com
- Zydeco Energy Inc. - www.znrg.com
- Geoservices Petroleum Links - www.geoservices.com
- OIL.COM - www.vlcc.com
- Pegasus Oil & Gas Directory - www.paston.co.uk
- Internet Resources - www.sci.geo.petroleum
- Internet Resources - www.slb.com
