Clientes

• Aetna Life Insurance Company
• AEP Energy Services, Inc.
• A. G. Edwards & Son, Inc.
• AIG Highstar Capital, LLC
• Alabama-Coushatta Tribe of Texas
• Alliance Resources PLC
• Allstate Insurance
• Altair Energy Corp.
• Altima
• Alto Energy, Inc.
• Altura Energy Ltd.
• Amaranth Group, Inc.
• American Central Gas Technology
• American Electric Power Resources
• American Express
• American General Insurance Company
• Amoco Corporation
• Ampolex Limited
• Amsterdam-Rotterdam Bank N.V.
• Anadarko Production Company
• Andrews & Kurth LLP
• Anglo-Dutch (Tenge) L.L.C.
• Anglo-Dutch Petroleum International, L.L.C.
• Anglo-Suisse Offshore Partners, LLC
• Apache Corporation
• ArcLight Capital Partners
• Arthur Andersen & Co.
• Asilo Partners
• The Athena Group, LLC
• Ciudad de Austin
• Babcock & Brown Energy, Inc.
• Ballard Exploration Company, Inc.
• Bank Mees & Hope N.V.
• Bank of America
• Barington Capital Group
• Bateman Chapman (Americas), Inc.
• The Bank of New York
• Bank of Nova Scotia
• Bank of Texas
• Bankers Trust Company
• Barclays Bank Plc
• Bateman Chapman Limited
• The Beacon Group
• Bear, Stearns & Co. Inc.
• Beck, Redden & Secrest
• Belco Oil & Gas Corp.
• Belden and Blake Corporation
• Belvieu Environmental Fuels
• Benchmark Oil & Gas AB
• Benton Trust Mineral Interests
• Boatmen's Trust Company
• Bobbitt & Halter
• Estudio Jurídico Bostic
• BP Exploration
• BP Exploration (Alaska) Inc.
• BP Prudhoe Bay Royalty Trust
• Bracewell & Patterson, L.L.P.
• Brentmoor Energy, Inc.
• British-Borneo Petroleum, Inc.
• British-Borneo USA, Inc.
• British Petroleum Company Limited
• Broughton Operating Corp.
• Brown Brothers Harriman & Co.
• Burlington Resources Inc.
• BT Energy Corporation
• B T Operating Co.
• C5 Group Inc.
• Cabot Oil & Gas Corporation
• Cadwalader, Wickersham & Taft LLP
• Callister & Reynolds
• Calpine
• Calpine Central, L.P.
• Camterra Resources, Inc.
• Cannon, Short & Gaston
• Case-Pomeroy Oil Corporation
• Celtic Resources Holding Plc
• Centaurus Advisors LLC
• Century Exploration
• The Chandler Company
• Chase Manhattan Bank, N.A.
• Chesapeake Energy Corporation
• Chevron Corporation
• Chevron North America Exploration & Production Co.
• Chevron International Oil Co.
• ChevronTexaco Corporation
• Chubb & Son Inc.
• CIGNA Corporation
• Cinergy Corp.
• Chesapeake Energy Corporation
• Clausen Miller, P.C.
• Cleco Energy LLC
• Coates Energy Trust
• The Collarini Companies
• Collier Resources Company
• Columbia Natural Resources
• Concert Capital Resources, LP
• Concorde Oil and Gas Plc
• Conoco, Inc.
• ConocoPhillips Company
• Continental Land & Fur Co., Inc.
• Cook Inlet/Alaska Partnership
• Cook Inlet Corporation
• Corus Group
• Cox & Smith, Inc.
• Credit Suisse First Boston
• Cross Timbers Oil Company
• CRSS Capital, Inc.
• Cunningham, Burke & Brooks, LLP
• CV Reef Company, L.P.
• Cyprus Amax Minerals Company
• Davis Oil Company
• Deloitte & Touche USA LLP
• Destec Energy, Inc.
• Devon Energy Corporation
• Diverse Energy Investments
• Doyle, Restrepo, Harvin & Robbins, LLP
• Dragon Energy Corporation
• Duke Energy Corporation
• Duncan Energy Company
• Duncan Oil, Inc.
• Duquesne Capital Management, LLC
• Dyer, Ellis & Joseph
• Eagle Investments
• Eckert, Seamans Cherin & Mellot, LLC
• Edge Petroleum
• El Paso Gas Marketing Company
• El Paso Natural Gas
• Elliott Associates, L.P.
• Elysium Energy LLC
• Emerald San Joaquin Corporation
• Enbridge Energy Company, Inc.
• EnCap Investments L.P.
• Encore Acquisition Company, Inc.
• Energen Resources
• Energy Development Corporation
• Energy Partners, Limited
• Energy Resource Technology, Inc.
• Energy XXI Acquisition Corporation
• Enserch Corporation
• Enterprise Companies, Inc.
• Entex, Inc.
• Ernst & Young LLP
• Erskine Energy
• Escondido Resources, LP
• European Oil and Gas Group
• Evergreen Resources, Inc.
• Exxon Production Research Company
• Falcon Seaboard
• Fidelity Exploration & Production Company
• Fidelity Management Research
• Fina Oil and Chemical Company
• First International Oil Corp.
• Fleckman & McGlynn, PLLC
• Forest Oil Corporation
• Fossil Bay Resources Ltd.
• French Production Incorporated
• Frontera Resources
• Fruitland Coal DB
• Fuel Resources Inc.
• Fulbright & Jaworski LLP
• Future Petroleum Company LLC
• General Motors Corporation
• The George Foundation
• Giant Exploration & Production Co.
• Global Natural Resources
• Goh Exploration Inc.
• The Goldman Sachs Group
• Goodrich Petroleum Corporation
• Great Western Drilling Company
• Greenhill Petroleum Corporation
• Greystone Petroleum, Inc.
• Grupo Endesa
• Grynberg Petroleum Company
• Gulfsands Petroleum Ltd.
• Gunnison Energy Corporation
• Hadson Energy Resources
• Hall Estill
• Halliburton
• Hannen and Collins Ltd.
• Universidad de Harvard
• Haynes and Boone, LLP
• Heritage Energy Company
• Hertz Corporation
• The Hillman Company
• HOCOL S.A.
• HOCOL Venezuela BV
• Holman Robertson Eldridge
• Houston Endowment, Inc.
• The Houston Exploration Company
• Hunt Oil Company
• Huron Consulting Group
• IHS Energy
• IMD Inc.
• Inexco Oil Company
• ING Bank
• INPEX Corporation
• Interpel Corp.
• IPR, Inc.
• C. Itoh Energy Group
• Jackson Walker LLP
• Jamex, Inc.
• JKX Oil & Gas plc
• JPMorgan Chase Bank.
• Justiss Oil Co., Inc.
• J-W Operating Co.
• Kay Scholer, L.L.P.
• Keith & Keith

• Kennedy Memorial Foundation
• Kerrco Inc.
• KeySpan Production & Development
• Killam Oil Co., Ltd.
• King Ranch Energy, Inc.
• King Ranch Minerals
• King Ranch Oil & Gas, Inc.
• Knightsbridge Petroleum (UK)
• KPMG LLP
• Kramer, Levin, Naftalis & Frankel, LLP
• KSE Energy LLC
• Landesbank
• Langham Petroleum Exploration Corporation
• Lanrus-Nedra
• Layline Energy LLC
• Legend Natural Gas, LP
• Legend Natural Gas II, LP
• Lime Rock Partners
• Lime Rock Resources
• Liquidating Trust of McKenzie Methane
• Locke Liddell & Sapp LLP
• Loews Corporation
• The Louisiana Land and Exploration Company
• MCN Corporation
• MCN Energy Group, Inc.
• MDS Energy Ventures, LC
• Macquarie Securities (USA), Inc.
• Maersk Energy Inc.
• Maersk Olie og Gas A/S
• Marathon Oil Company
• Matrix Oil & Gas, Inc.
• Matthiesen, Chase & Erwin, LLP
• Maurel et Prom
• Maverick Oil and Gas, Inc.
• Maxson Young Associates, Inc.
• Maxus Energy Corporation
• Mayer, Brown, Rowe & Maw LLP
• Mayor, Day, Caldwell & Keeton, L.L.P.
• McCamish, Deely & Rapp, P.C.
• The McConn Law Firm
• McDermott International, Inc.
• MCNIC Oil & Gas Company
• Melrose Energy Plc
• Meridian Oil Inc.
• Merrill Lynch & Co., Inc.
• MESA Inc.
• Metropolitan Life Insurance Company
• Microsoft Corporation
• Midcoast Energy Resources Inc.
• Midgard Energy Company
• Miller & Chevalier
• Miller Oil Corporation
• Millsion Resources
• Mirant Americas Energy Capital
• Mitsui Tubular Products, Inc.
• Mobil Oil Corporation
• Moncrief Oil International, Inc.
• Moran Resources Company
• Morgan Grenfell & Co. Limited
• Morgan Guaranty Trust Company
• Morgan Stanley Group
• Murphy H. Baxter, Inc.
• National Petroleum Company
• Nations Energy Company Ltd.
• Natrual Gas Ventures, Inc.
• NCNB Texas
• Nemours Energy
• New Stream Capital
• North American Exploration Co.
• North Central Oil Corporation
• Northwest Pipeline
• Nuevo Energy Company
• Occidental Oil and Gas Corporation
• Ocean Energy, Inc.
• Oil & Gas Producers, Inc.
• Oil & Natural Gas Corp. Ltd.
• Oppenheimer, Rosenberg, Kelleher & Wheatley, Inc.
• O�Quinn, Laminack & Pirtle
• Orient Petroleum, Inc.
• Osprey Petroleum Company, Inc.
• Overseas Private Investment Corporation (OPIC)
• Pace Global Energy Services
• Pacific Gas and Electric
• Pacific Resources, Inc.
• Panhandle Eastern Pipe Line Company
• Parma Resources
• Pecten Companies
• Pegasus Capital Advisors, L.P.
• Penn Virginia Oil and Gas Corp.
• Pennzoil Company
• Peoples Energy Production Company
• Perry & Kellogg, L.L.P.
• Petrie Parkman & Co.
• PetroNorth AS
• Petross, LLC
• Petrotex Engineering Company
• Pipitone, Schauer, Simank & Ledbetter
• Placer Dome America
• Placid Oil Company
• Plains Resources Inc.
• Pluspetrol International, Inc.
• Pogo Producing Company
• Porter, Rogers, Dahlman, Gordon & Lee
• The Powell Group
• PricewaterhouseCoopers LLC
• Prim & Associates
• Prudential Insurance Company
• Purvin & Gertz, Inc.
• Quantum Energy Technologies Pty Ltd
• Rebel Drilling Company, L.P.
• Reliance Industries Limited
• Remington Oil and Gas Corporation
• Richardson Barr & Co.
• Robbins Gas Co.
• Rock Well Petroleum, Inc.
• Roetzel & Andress
• Roff Resources LLC
• Rohm and Haas
• Rose Glen Capital Group, Inc.
• Royal Operating
• Rusk Energy, Ltd.
• Rutherford Oil Corporation
• Saccomanno & Clegg, L.L.P.
• Samson Investment Company
• Saracon Industrial Services
• Savannah Oil and Gas, LLC
• Schaefer Energy
• Scotiabank
• Scott, Douglass, Luton & McConnico, L.L.P.
• Scudder Kemper Investments
• Scudder, Stevens & Clark
• SeaFirst Bank
• Seagull Energy E&P Inc.
• Seneca Resources Corporation
• Shart International Inc.
• Shell Oil Company
• Shogun Enterprises, Inc.
• Shona Energy Company
• SKH Management, L.P.
• SKM Growth Investors
• Smith Development Corporation
• Smith Production Inc.
• Snyder Oil Company
• Society of Petroleum Engineers
• Sonangal USA Company
• South Texas Land Limited Partnership
• Southern California Public Power Authority
• SPI Operations LLC
• Spinnaker Exploration Company, LLC
• St. Mary Land & Exploration Company
• The Standard Oil Company
• Estado de Florida
• Estado de Louisiana
• Estado de Texas
• Stone Energy Corporation
• The Strickland Group
• R. W. Sturge & Co.
• Sun Oil International Inc.
• Sundown Energy, Inc./Eland Energy
• Sunshine Gas Ltd.
• Supply Development Group, Inc.
• Susman Godfrey L.L.P.
• Swift Energy Company
• Syntroleum Corporation
• Texas Commerce Bank
• Texas Scottish Rite Hospital for Children
• Thorp Petroleum Corporation
• Tinsman & Houser
• Torch Energy Advisors Incorporated
• Total
• Transmeridian Exploration, Inc.
• TransOil Investments LLP
• Triad Energy Exploration, Inc.
• Triton Engineering Services
• Triumph Resources Corporation
• Trunkline Gas Company
• Trust Company of the West
• Union Exploration Partners
• Union Oil Company of California
• Uniroyal, Inc.
• Departamento de Energía de los Estados Unidos
• Universidad de Houston
• Unocal Corporation
• USA Exploration and Production, LLC
• Vastar Resources, Inc.
• Velocity Energy Limited LLC
• Verner Lipfert Bernhard McPherson & Hand, Chartered
• Vinson & Elkins LLP
• Vintage Petroleum, Inc.
• Vulcan Capital Management
• Wells Fargo & Company
• Wesley West Interests, Inc.
• Westinghouse Electric
• West Oil
• Westport Resources Corp.
• Westward Energy, Inc.
• White Oak Energy
• Williams Coal Seam Gas Royalty Trust
• Williams Field Services Company
• The Williams Companies
• Wing Corporation
• The Wiser Oil Company
• Banco Mundial
• XTO Energy Inc.
• Yarborough Royalties

Clientes Internacionales

• Aganskneftgas
• All-Russia Research Geological Institute (VNIGNI)
• Arkhangelsgeoldobydia OAO
• Bashneft JSC
• Bekstar International Limited
• Big Star International Ltd.
• Bogorodskneft ZAO
• Buzachi Oil TOO
• Caspian Energy Group Limited
• CaspiNeft
• CaspiOilGas TOO
• Celtic Resources Holding Plc
• Central Asian Enterprise
• Chernogorneft JSC
• Chinese International Trading and Investment Company (CITIC)
• China National Offshore Oil Company Limited
• Chornomornaftogaz GAO
• Conoil Producing Limited
• Consolidated Oil & Gas, Inc.
• Cooper Basin Producers (S. Australian Oil & Gas Co., Santos Ltd., Delhi International, TOTAL, Reef, Bridge Oil, etc.)
• Danao Engineering LLC
• Desford International, Ltd.
• Deutsche Bank AG
• Dresdner Kleinwort Benson
• Dresdner Kleinwort Wasserstein
• Ecology and Progress Ltd.
• Ecopetrol
• Euro Gas Consulting OOO
• European Bank for Reconstruction and Development (EBRD)
• European Banking Company Limited
• Gas and Oil Company
• Gas I Neft Co. OOO
• Gazprom Neft OAO
• Georgian-British Oil Company
• Geotransgas
• Givot Olam Oil Ltd.
• Glencore UK Ltd.
• IGIRGI
• Impex-Oil LLC
• Insurance Australia Group (IAG)
• International Industrial Bank
• Irtuksk Oil Company
• ITERA Oil and Gas Company OOO NAK
• Jukola-Neft SC
• Kaliningradneft
• Kalinovskneft OOO
• Kamenistoye LLC
• Karazhanbasmunai
• Kholmskneftegas
• Komioil Ltd.
• Korea Gas Corportion
• Korea National Oil Corporation
• Kostromeneftegas
• LUKoil Oil Company
• LUKoil Company KomiTEK OAO
• LUKoil-AIK ZAO
• LUKoil Overseas Kumkol B.V.
• LUKoil-Perm ZAO
• Malka OOO
• Metallionvest
• Methanex Australia Pty Ltd.
• Moscow Oil Co.
• NADRA Concern JSC
• Naftogaz of Ukraine NJSC
• Naftogazvydobuvannya ZAT
• National Westminster Bank Limited
• Neftegasprom
• Neftegastechnologia
• Neftegazkonsult (NGK) OOO
  • Alliance Oil Company
  • Eton-Oil OOO
  • Kalinovskneft OOO
  • Neftebitum (WorldMark) OAO
  • Potential Oil OOO
  • Tatnefteotdacha OAO
• Neftegazodobycha
• Neftemontazhsptesstroy ZAO
• NIKoil
• Nimir Energy Services Limited
• Nimir Petroleum Company Limited
• Nimir Petroleum Venezuela
• Nizhnevartovskneft JSC
• Nobel Oil Company
• Nobel Oil ZAO
• Old River Partners
• ONGC Videsh Limited
• Orenburgneft OAO
• Pemex
• Pechereskaia Energeticheskaia OOO
• Perenco
• Petroleum Investment House ZAO FC
• Petrosakh ZAO

• Preobrazhenskneft ZAO
• Prikamsky Investment Alliance
• RITEK OAO
• ROEL Capital
• Rohol-Aufsuchungs Aktiengesllschaft (RAG)
• RUSIA Petroleum OJSC
• Rosneft Oil Company OAO
  • Purneftegas
• RussNeft OAO NK
  • Aganneftegasgeologia OAO MPK
  • AKI-OTYR OAO NAK
  • Archneftegeologia ZAO
  • Belkamneft OOO
  • Benodet Investments Limited
  • Chernogorskoye OOO SP
  • Goloil ST ZAO
  • Kalinovoye OOO
  • Komnedra OAO
  • Mokhtikneft I OAO
  • Mokhtikneft II OAO
  • Nafta-Ulyanovsk ZAO
  • Nedra OAO UPK
  • Novo-Aganskoye OOO
  • Penzaneft OAO NGDU
  • Regional Petroleum Consortium OOO
  • Saratovneftegas OAO
  • Severneft-Yarainer OOO
  • Severnoyeneftegas OAO
  • Sobolinoye ZAO
  • Tomsk Oil ZAO
  • Udmurt National Oil Company OOO
  • Udmurt Oil Company OAO
  • Udmurtgeologia OOO
  • Ulyanovskneft OAO
  • Urals Oil OAO
  • Valyuninskoye OOO
  • Varyeganneft OAO
  • White Nights OOO
  • Zapadno-Malobalykskoye OOO
• Salcom Enterprises Limited
• Samararostopprom OAO
• Samarainvestneft OAO
• Sevmorneftegaz
• Siberian American Oil Company
• Siberian Oil Company OAO
• Siberianoil OJSC
• Sibneft (East Siberian Oil Company) OJSC
• Sibnafta
  • Gold Groupp OOO
  • Progres-S OOO
  • Sredne-Vasyuganskoe OOO
  • Uralnefteservis ZAO
• Sidanko OJSC
• Sinochem Petroleum Exploration and Production Co., Ltd.
• Sinopec Corp.
• Slavneft OAO NGK
  • Megionneftegas OAO
• Société Générale
• Sovlink
• State Oil Company of Azerbaijan (SOCAR)
• STS-SERVIS OOO
• Taas-Yuryakh Neftegazodobycha OOO
• Tatneft Joint Stock Company OAO
• Tatnefteprom OAO
• Tengizchevroil LLP
• Timan Oil & Gas PLC
• Trans European Energy Services, Ltd.
• Transworld Exploration and Production, Inc.
• Tyumen Oil Company
• Tyumenneftegas
• UBS Energy LLC
• Ukrgasvydobuvannya DK
• Ukrgazdobycha
• Ukrnafta OAO
• Ukrtatnafta JSC
• United Oil Group OOO
• Urals Energy Public Company Limited
• Urals Energy (UK) Ltd.
• Urengoygeoresurs
• Victorian Oil & Gas plc
• Volganeft
• Woodside Energy Ltd.
• Woodside Petroleum Development Pty. Ltd.
• Yangpur, LLC
• Yenisei OOO
• YUKOS Oil Corporation OAO NK
  • Arctic Gas Company OAO
  • East-Siberian Oil Company OAO
  • Samaraneftegas OAO
  • Tomskneft VNK OAO
  • Urengoil Inc. ZAO
  • Yuganskneftegaz OAO
• Yuzhuralneftegaz OAO
• Zaab Invest, LLC
• Zarubehzneft