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Client Experience
During its 53-year history, Groppe, Long & Littell has worked with an impressive roster of petroleum, chemical, financial, pipeline and utility companies, and governments including:

Oil & Gas Production

AFREN Resources USA, Inc.
Agip Petroleum
Alberta Energy Company

Alta Resources
Amerada Hess Corporation
Anadarko Minerals, Inc.
Anderson Oil & Gas
Anschutz Corporation
Apache Corporation
Antelope Energy Company, LLC
Artex Oil Company
Bettis Brothers, LP

Burleson Petroleum
Tom Brown, Inc.
Cabot Oil & Gas
Canadian Hunter Exploration
Chesapeake Energy Corporation
CMS Oil & Gas Company
Conwest Exploration
Coleman Oil & Gas, Inc.
Continental Resources, Inc.

CrownQuest Operating
Devon Energy, Inc.
Dutcher & Company
EnCana Corporation
Energy Corporation of America
Energy Development Corp.
Fasken Oil and Ranch Ltd.
Forest Oil Corporation
French Oil Company
Greenhill Petroleum
Harbert Energy
Henry Petroleum
Holly Corporation
Intrepid Energy, Ltd.
Lake Ronel Oil Company

Kuwait Energy Services, Ltd.
Mack Energy Corporation
Marsh Operating Company
Mesa Petroleum
Momentum Operating Company
NCE Resources Group
Murphy Oil Corporation
Ocean Energy, Inc.
Pacific Enterprises Oil & Gas
Pan Canadian Petroleum
Pengrowth Management Limited
Plains Exploration & Production
     Company
Pogo Producing
Quintana Petroleum
Santa Fe Minerals
Seagull Energy
Smith Management
Summit Petroleum
Terrace Petroleum Corporation
Texas Crude Exploration
Triton Energy Corporation
Transworld Oil
UMC Petroleum
Union Texas Petroleum
Wagner & Brown
Walter Oil & Gas Corporation
Wapiti Energy, LLC

Whiting Petroleum
Wilbanks Reserves Corporation
Clayton Williams Energy, Inc.

XPLOR Energy Corporation

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Integrated
American Petrofina
Amoco Corporation
Chevron
Pennzoil Company
Shell Oil Company
Sun Company
Unocal
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Oilfield Services
Arethusa Off-Shore
Brown & Root
Galveston-Houston Co.
Grey Wolf, Inc.
Global Santa Fe
Hercules Offshore, Inc.
McDermott International

National-Oilwell-Varco, Inc.

ProPetro Services
R & B Falcon
Seahawk Drilling
TODCO
Transocean 
Weatherford International Inc.

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Chemical
Air Products & Chemical
ARCO Chemicals
BASF Corporation
Borg-Warner Chemicals
Cabot Corporation
Dart Industries
Dow Chemical Company
Ethyl Corporation
E.I. du Pont de Nemours & Co.
Hercules, Inc.
Himont Incorporated
Koch Chemical International
National Helium Corp.
Oxirane Corp.
Petro-Tex
PCS Nitrogen
PPG Industries
Quantum Chemical
Texaco Chemicals
Texas Eastman
Union Carbide Corp.
Westlake Group
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Pipelines & Utilities
American Oil & Gas
Calpine Natural Gas Company
Centerpoint Energy
Cheniere Energy, Inc.
Dominion Resources
ENRON Corp.
Florida Gas Transmission
Florida Power & Light
Houston Lighting & Power
Houston Natural Gas
Kaneb Services, Inc.
MAPCO, Inc.
PacifiCorp Power Marketing
Panhandle Eastern
PSE, Inc. (Now Destec)
Reliant Energy
TECO Energy
Transco Energy
Valero
West Texas Gas
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Other Companies

Continental Airlines

General Mills
Gerald D. Hines Interests
JB Coal to Methane Ventures,
    LLC
Petrochemical Energy Group

Reliance Industries Limited
Sea-3, Inc.
Tenaska Marketing Ventures
United Energy Trading, LLC
US Foodservice, Inc.
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Financial
Amiral Gestion
Armstrong Equity Partners, LP
Avenir Capital Corporation
Belridge Energy Advisors
BP Capital L.P.
Canaccord Capital Corporation
Chen Capital Management
Deans Knight Capital
    Management, Ltd.
Dresdner RCM Global
    Investors, LLC
Equinox Partners, LP
Fidelity Investments
First City National Bank
Fitzgerald Capital
General Electric Credit
GE Energy Financial Services
Guardian Capital
Kistler Investment Co.
Scott Lamacraft
MCorp
John D. & Catherine T.
    MacArthur Foundation

Middlefield Capital Corporation

The Mitchell Group
Odyssey Partners
The Old Mountain Company,
    Inc.
Passport Capital
Pate Capital Partners LP
Prudential Insurance Co.
Rauscher-Pierce Securities
RepublicBank
Sandefer Capital
Socratic Fund
Steinberg Asset Management,
    LLC
Texas Commerce Bank
Texas Petroleum Investment
    Corporation

David W. Tice & Associates
E.W. Warburg, Pincus & Co.
Wedge Group
Willingham Asset Management

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Governments
Mexico
Venezuela
Korea
Finland
Province of Quebec
Alberta Department of Energy

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