Établissements Maurel & Prom

A.I.S. Resources Limited
A2D Technologies
Abbot Group Limited
Abington Resources Ltd.
Abraxas Energy Partners, L.P.
Abu Dhabi National Oil Company
Action Energy Inc.
Addax Petroleum Corporation
Advantage Oil & Gas Ltd. [AAV]
Aera Energy LLC
Afren plc
AKITA Drilling Ltd.
AltaCanada Energy Corp.
American Natural Energy Corporation
Amerisur Resources PLC
Aminex PLC
Anadarko Algeria Company, LLC
Anderson Energy
Antrim Energy Inc.
Apache North Sea Limited
Approach Resources Inc. [AREX]
Arawak Energy Ltd.
Arcis Corporation
Arena Resources, Inc. [ARD]
Aspen Group Resources Corporation [ASRPF.PK]
Atlas Energy Resources, LLC [ATN]
Atlas Energy, Inc. [ATLS]
Atlas Pipeline Holdings, L.P. [AHD]
Atwood Oceanics, Inc. [ATW]
Aurado Energy Inc.
Aurora Oil & Gas Corporation [AOGSQ.PK]
Austral Pacific Energy Ltd. [AUSPF.PK]
Avalon Oil & Gas, Inc. [AOGN.OB]
Avenue Group, Inc. [AVNU.PK]

Bankers Petroleum Ltd.
Belden & Blake Corporation
Bella Media PLC
BG Group plc [BRGYY.PK]
Big Sky Energy Corporation [BSKO.PK]
Bill Barrett Corporation [BBG]
Birchcliff Energy Ltd.
Blue Ridge Group, Inc.
Bonavista Energy Trust
BP (China) Holdings Limited
BP Brasil Ltda
BP Exploration Operating Company Limited
BP NGL
BP Sakhalin
BPZ Resources, Inc. [BPZ]
BreitBurn Energy Partners L.P. [BBEP]
Bridge Resources Corp.
Bronco Drilling Company, Inc. [BRNC]
Bucking Horse Energy Inc.
BUE Marine Limited

C & C Technologies, Inc.
Caddo International, Inc. [CADD]
Cairn Energy PLC
Calfrac Well Services Ltd.
CAMAC International Corporation
Canadian Oil Sands Trust [COSWF.PK]
Canadian Superior Energy Inc. [SNG]
CanArgo Energy Corporation
Cano Petroleum, Inc. [CFW]
Celtic Exploration Ltd.
Century Energy Ltd.
CEP International Petroleum Ltd.
Cequence Energy Ltd.
Chaparral Energy, Inc.
Cheniere Energy, Inc. [LNG]
Chevron U.K. Ltd
China National Offshore Oil Corporation
China National Petroleum Corporation
China North East Petroleum Holdings Limited
Chugach Alaska Corporation
CityView Corporation Limited [CTVWF.OB]
CNPC (Hong Kong) Limited
CNX Gas Corporation [CXG]
Cobalt International Energy, L.P.
Cobra Venture Corporation
Compton Petroleum Corporation [CMZ]
Concho Resources Inc. [CXO]
Connacher Oil and Gas Limited
ConocoPhillips Alaska, Inc.
Consolidated Beacon Resources Ltd.
Constellation Energy Partners LLC [CEP]
Continental Resources, Inc. [CLR]
Corridor Resources Inc.
Crescent Point Energy Corp.
Crew Energy Inc.
Crusader Energy Group Inc.
Curlew Lake Resources Inc. [CWLXF.PK]
Cygam Energy Inc.
Cyries Energy Inc.

Dakota Gasification Company
Dana Petroleum plc
Deep Well Oil & Gas, Inc. [DWOG.PK]
Derek Oil & Gas Corporation [DRKOF.PK]
Desire Petroleum plc
Destiny Resource Services Corp.
Diamond Offshore Drilling, Inc. [DO]
Diaz Resources Ltd.
Dolphin A/S
Doyon, Limited
Dragon Oil PLC
Dune Energy, Inc. [DNE]

Ecopetrol S.A. [EC]
Eden Energy Corp. [EDNE.OB]
Edge Petroleum Corporation [EPEXQ.PK]
EGPI Firecreek, Inc.
Ellora Energy Inc.
Emerald Energy Plc
EnCana Oil & Gas (USA) Inc.
Encore Energy Partners LP [ENP]
EnCore Oil plc
Energy Corporation of America
EnerJex Resources, Inc.
Enerplus Resources Fund [ERF]
ENSCO International Incorporated [ESV]
Ensign Energy Services Inc.
Ensign United States Drilling Inc.
Enterra Energy Trust [ENT]
EQT Production
Eurogas Corporation
EV Energy Partners, L.P. [EVEP]
Excelsior Energy Limited

Fairborne Energy Ltd.
FairWest Energy Corporation
Falcon Oil & Gas Ltd.
Faroe Petroleum plc
First Calgary Petroleums Ltd.
Flint Hills Resources, LP
Fortress Energy Inc.
Fugro N.V.
FX Energy, Inc. [FXEN]

Gale Force Petroleum Inc.
Galleon Energy Inc.
Gastar Exploration Ltd. [GST]
GE Oil & Gas
GeoGlobal Resources Inc. [GGR]
GeoMet, Inc. [GMET]
GeoTomo LLC
Glen Rose Petroleum Corporation [GLRP]
Global Energy Development PLC
Global Geophysical Services, Inc.
Great Plains Exploration Inc.
Guardian Exploration Inc.
Gulf Island Fabrication, Inc. [GIFI]
Gulfside Minerals Ltd.

Habanero Resources Inc.
Harbison-Fischer Manufacturing Company
Hardy Oil and Gas plc
Heartland Oil and Gas Corp. [HTOG.PK]
Helmerich & Payne International Drilling Co.
Helmerich & Payne, Inc. [HP]
Hercules Offshore, Inc. [HERO]
Heritage Oil Corporation
Hess Limited
Hiland Holdings GP, LP [HPGP]
Hiland Partners, LP [HLND]
Hilcorp Energy Company
Howard Energy Corp.
Hunt Consolidated Inc.
Hunt Oil Company
Husky Energy Inc.
Hyperdynamics Corporation [HDY]

Imperial Energy Corporation PLC
Infinity Energy Resources, Inc. [IFNY.PK]
INPEX Corporation
Insignia Energy Ltd.
Iteration Energy Ltd.
Ivanhoe Energy Inc. [IVAN]

Jacobs Financial Group, Inc. [JFGI.OB]
Japan Petroleum Exploration Co. Ltd.
JED Oil Inc. [JDO]
JKX Oil and Gas plc
Jura Energy Corporation

Kaiser-Francis Oil Company
KCA DEUTAG Drilling Limited
Key Energy Services, Inc. [KEG]
Kodiak Oil & Gas Corp. [KOG]
Kuwait Petroleum Corporation

Legacy Reserves LP [LGCY]
LiteWave Corp. [LTWV.PK]
LongBow Resources Inc.
Lundin Petroleum AB

Mahalo Energy Ltd. [MHLQF.PK]
Manas Petroleum Corporation [MNAP.OB]
Marathon Oil Company
Marathon Oil UK Ltd.
Mariner Energy, Inc. [ME]
MarkWest Energy Partners, L.P. [MWE]
Marubeni Corporation [MARUY.PK]
Matador Resources Company
Matrix Energy Services Corporation
Maverick Minerals Corporation [MVRM.OB]
Melrose Resources plc
Meridian Petroleum plc
Merit Energy Company
Metalore Resources Limited
Midnight Oil Exploration Ltd.
Miller Petroleum, Inc. [MILL.OB]
Montello Resources Ltd.
Mooncor Oil and Gas Corp.
Murphy Exploration & Production Company - International
Murphy Exploration & Production Company - USA
Mustang Fuel Corporation
MV Oil Trust [MVO]

Nabors Drilling USA, LP
Nabors Industries Ltd. [NBR]
Nabors Well Services
NATCO Group Inc. [NTG]
National Iranian Oil Company
National Oil Corporation
New Concept Energy, Inc. [GBR]
Nexen Inc. [NXY]
NGAS Resources, Inc. [NGAS]
Nicklos Drilling Company
Niko Resources Ltd.
Noble Corporation [NE]
Noble Drilling (U.S.) Inc.
North West Oil Group Inc.
NuTech Energy Alliance Corporation
NuVista Energy Ltd.
NXT Energy Solutions Inc.

OAO Gazprom
OAO NOVATEK
OAO Rosneft Oil Company
OAO Tatneft
Occidental Oil and Gas Corporation
Occidental Permian, Ltd.
Oil & Natural Gas Corporation Limited
Oil and Gas Development Company Limited
Oil Search Limited
OJSC Surgutneftegas
One World Investments Inc.

Pacific Energy Resources Ltd.
Pacific Rubiales Energy Corp.
Pan Andean Resources PLC
Paradigm B.V.
Paramount Resources Ltd.
Parker Drilling Company [PKD]
Patterson-UTI Energy, Inc. [PTEN]
Pavilion Energy Resources, Inc. [PVRE.PK]
Peak Energy Services Trust
Pebercan Inc.
Pengrowth Energy Trust [PGH]
Penn West Energy Trust [PWE]
Perusahaan Pertambangan Minyak Dan Gas Bumi Negara
Petrel Resources plc
Petro Andina Resources Inc.
Petro-Hunt, L.L.C.
PetroBakken Energy Ltd.
Petrobank Energy and Resources Ltd.
Petrobras America Inc.
Petroceltic International plc
PetroKazakhstan Inc.
Petroleum Geo-Services ASA [PGSVY.PK]
Petrolifera Petroleum Limited
Petsec Energy Ltd [PSJEY.PK]
Peyto Energy Trust
Phoenix Technology Income Fund
Pinnacle Gas Resources, Inc. [PINN]
Pioneer Drilling Company [PDC]
Pioneer Oil and Gas
Pioneer Southwest Energy Partners L.P. [PSE]
Portrush Petroleum Corporation [PRRPF.OB]
Premier Oil plc
Pride International, Inc. [PDE]
Progress Energy Resources Corp.
Providence Resources, Inc. [PVRS.OB]
Pulse Seismic Inc.
Pyramid Oil Company

Quest Energy Partners, L.P. [QELP]
Quest Resource Corporation [QRCP]
Questar Market Resources, Inc.
Questerre Energy Corporation
Quicksilver Gas Services LP [KGS]

RAM Energy Resources, Inc.
Ramco Energy plc
Regal Petroleum plc
Rex Energy Corporation [REXX]
Rider Resources Ltd.
Rival Energy Ltd.
Roc Oil Company Limited
Rock Energy Inc.
Rock Energy Resources, Inc. [RCKE.PK]
Rocky Old Man Energy Inc.
Rowan Companies, Inc. [RDC]
RPS Energy
RPS Scotia
RWE-DEA Aktiengesellschaft für Mineraloel und Chemie

Saipem America, Inc.
Saipem S.p.A.
Sakhalin Energy Investment Company Ltd.
Samson Investment Company
Samson Oil and Gas Limited [SSN]
SandRidge Energy, Inc. [SD]
Santos Ltd [STOSF.PK]
Saxon Energy Services Inc.
Seahawk Drilling, Inc. [HAWK]
Secunda Marine Services
Sefton Resources, Inc.
Seitel, Inc.
Seneca Resources Corporation
Serica Energy plc
Sharon Energy Ltd.
Shell Canada Limited
Shell Exploration & Production Company
Signa Engineering Corp.
SOCO International plc
Softrock Minerals Ltd.
South Texas Oil Company [STXXQ.PK]
Spectrum ASA
Sperry Drilling Services
Standard Energy Corporation [STDE.PK]
Statoil ASA [STO]
Sterling Energy plc
Sterling Resources Ltd.
Stetson Oil & Gas Ltd.
Storm Cat Energy Corporation [SCUEF.PK]
Strata Oil & Gas Inc. [SOIGF.OB]
Stratic Energy Corporation
Sundance Resources, Inc.
Sure Energy Inc.
Surge Global Energy, Inc. [SRGG.OB]
Sword Energy Inc.
Syncrude Canada Ltd.

TAQA North Ltd.
TBX Resources, Inc. [TBXC.PK]
Technip [TKPPY.PK]
Tengasco, Inc. [TGC]
Teton Energy Corporation [TEC]
Texalta Petroleum Ltd.
Texas American Resources Company
TG World Energy Corp.
TGS-NOPEC Geophysical Company ASA
THUMS Long Beach Company
Titan Logix Corp.
Torque Energy Inc.
Total E&P Joslyn Ltd
Total Energy Services Inc.
TRAFINA Energy Ltd.
TransAtlantic Petroleum Corp.
Transocean Inc. [RIG]
Treaty Energy Corporation [TECO.OB]
Trek Resources, Inc.
Tri-Valley Corporation [TIV]
Tribute Resources Inc.
Trican Well Service Ltd.
Trident Resources Corp.
Trinidad Drilling Ltd.
Triple 8 Energy Ltd.
Trivello Energy Corp.
True Energy Trust
TrueStar Petroleum Corporation
Tullow Oil plc
Tuscany Energy Ltd.
Twin Butte Energy Ltd.
TXCO Resources Inc. [TXCOQ.PK]
TXO plc

Union Drilling, Inc. [UDRL]
Unit Corporation [UNT]
Urals Energy PLC
UTS Energy Corporation

Vanguard Natural Resources, LLC [VNR]
Venoco, Inc. [VQ]
Venture Production plc
Verenex Energy Inc.
Vero Energy Inc.

W&T Offshore, Inc. [WTI]
West Energy Ltd.
Western Canada Energy Ltd.
Western States International, Inc.
WesternGeco
Whiting Petroleum Corporation [WLL]
Windsor Energy Resources, Inc.
Winstar Resources, Ltd.
Wintershall Holding AG
Woburn Energy Plc
Woodside Petroleum Ltd. [WOPEY.PK]

XXL Energy Corp.

Yangarra Resources Ltd.
Yasheng Eco-Trade Corporation [YASH.OB]
Yoho Resources Inc.

Zapata Energy Corporation