Établissements Maurel & Prom

A.I.S. Resources Limited
Abbot Group Limited
Abington Resources Ltd.
Abu Dhabi National Energy Company PJSC
Abu Dhabi National Oil Company
Addax Petroleum Corporation
Advantage Oil & Gas Ltd. [AAV]
Aera Energy LLC
Afren plc
AKITA Drilling Ltd.
Alta Mesa Holdings, LP
AltaCanada Energy Corp.
American Natural Energy Corporation
American Oil & Gas, Inc.
Amerisur Resources PLC
Aminex PLC
Anadarko Algeria Company, LLC
Anderson Energy
Antrim Energy Inc.
Apache North Sea Limited
Approach Resources Inc. [AREX]
Arawak Energy (U.K.) Limited
ARC Resources Ltd.
Archer Limited
Aspen Group Resources Corporation
Athabasca Oil Sands Corporation
Atwood Oceanics, Inc. [ATW]
Australian-Canadian Oil Royalties Ltd. [AUCAF]
Avalon Oil & Gas, Inc. [AOGN]
Avenue Group, Inc. [AVNU]

Bankers Petroleum Ltd.
Belden & Blake Corporation
Bellatrix Exploration Ltd.
BG Group plc [BRGYY]
Big Sky Energy Corporation
Bill Barrett Corporation [BBG]
Birchcliff Energy Ltd.
BlackPearl Resources Inc.
Blue Ridge Group, Inc.
Bonavista Energy Corporation
Bonterra Energy Corp.
BP Exploration Operating Company Limited
BP NGL
BPZ Resources, Inc. [BPZ]
BreitBurn Energy Partners L.P. [BBEP]
Bridge Resources Corp.
Bucking Horse Energy Inc.

Caerus Oil and Gas LLC
Cairn Energy PLC
Calvalley Petroleum Inc.
CAMAC International Corporation
Canadian Oil Sands Limited [COSWF]
Canadian Utilities Limited
Cano Petroleum, Inc. [CANOQ]
Celtic Exploration Ltd.
Cenovus Energy Inc. [CVE]
Central Energy Partners L.P.
Century Energy Ltd. [CEYFF]
Cequence Energy Ltd.
Chaparral Energy, L.L.C.
Cheniere Energy, Inc. [LNG]
Chesapeake Oilfield Services, Inc.
Chevron United Kingdom Limited
China National Offshore Oil Corp.
China National Petroleum Corporation
China North East Petroleum Holdings Limited
Chinook Energy Inc.
Chugach Alaska Corporation
Cinco Resources, Inc.
Citation Oil & Gas Corp.
CityView Corporation Limited [CTVWF]
CNX Gas Corporation
Cobra Venture Corporation
Compton Petroleum Corporation
Concho Resources Inc. [CXO]
Connacher Oil and Gas Limited
ConocoPhillips Alaska, Inc.
Consolidated Beacon Resources Ltd.
Constellation Energy Partners LLC [CEP]
Corridor Resources Inc.
Crescent Point Energy Corp.
Crestwood Midstream Partners LP [CMLP]
Crew Energy Inc.
Cross Border Resources, Inc. [XBOR]
Cross Timbers Royalty Trust [CRT]
Crusader Energy Group LLC
Curlew Lake Resources Inc. [CWLXF]
Cygam Energy Inc.

Dakota Gasification Company
Dana Petroleum plc
Deep Well Oil & Gas, Inc. [DWOG]
Dejour Energy Inc. [DEJ]
DEO Petroleum plc
Derek Oil & Gas Corporation [DRKOF]
Desire Petroleum Plc
Diamond Offshore Drilling, Inc. [DO]
Diaz Resources Ltd.
Dolphin Drilling A/S
Dragon Oil plc
Dundee Energy Limited
Dune Energy, Inc. [DUNR]
Dynamic Offshore Resources, LLC

Earthstone Energy, Inc.
EastSiberian Plc
Eco-Trade Corporation
Eden Energy Corp. [EDNE]
EGPI Firecreek, Inc.
Ellora Energy Inc.
Emerald Energy Plc
Empire Energy Corporation International [EEGC]
Encana Oil & Gas (USA) Inc.
Encore Energy Partners LP
Energy & Exploration Partners, Inc.
Energy Corporation of America
EnerJex Resources, Inc.
Enerplus Corporation [ERF]
EnerVest, Ltd.
EnQuest PLC
Ensco plc [ESV]
Ensign Energy Services Inc.
Ensign United States Drilling Inc.
EP Energy LLC
EQT Production
Ergon, Inc.
EV Energy Partners, L.P. [EVEP]
Exillon Energy plc

FairWest Energy Corporation
Falcon Oil & Gas Ltd.
Faroe Petroleum plc
Fortress Energy Inc.
FX Energy, Inc. [FXEN]

Gale Force Petroleum Inc.
GeoMet, Inc. [GMET]
GeoResources, Inc.
Georox Resources Inc.
Glen Rose Petroleum Corporation [GLRP]
Global Energy Development PLC
Guardian Exploration Inc.

Habanero Resources Inc.
Halcón Resources Corporation
Harbison-Fischer Manufacturing Company
Hardy Oil and Gas plc
Heartland Oil and Gas Company [HTOG]
Helmerich & Payne International Drilling Co.
Helmerich & Payne, Inc. [HP]
Hercules Offshore, Inc. [HERO]
Heritage Oil Limited
Hess Limited
Hilcorp Energy Company
Howard Energy Corp.
Hugoton Royalty Trust [HGT]
Hunt Consolidated Inc.
Hunt Oil Company
Husky Energy Inc.
Hyperdynamics Corporation [HDY]

Infinity Energy Resources, Inc. [IFNY]
INPEX Corporation
Insignia Energy Ltd.
Ivanhoe Energy Inc. [IVAN]

J-W Operating Company
Japan Petroleum Exploration Co. Ltd.
JKX Oil & Gas plc
John D. Oil and Gas Company [JDOGQ]
Jones Energy, Ltd.
Jura Energy Corporation

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

Legacy Oil + Gas Inc.
Legacy Reserves LP [LGCY]
LiteWave Corp. [LTWV]
Long Run Exploration Ltd.
Luca Technologies Inc.
Lundin Petroleum AB

Magnum Hunter Resources Corporation [MHR]
Manas Petroleum Corporation [MNAP]
Marathon Oil UK Ltd.
MarkWest Energy Partners, L.P. [MWE]
Marubeni Corporation [MARUY]
Mærsk Oil and Gas AS
MEG Energy Corp.
Melrose Resources plc
Merit Energy Company, LLC
Metalore Resources Limited
MIE Holdings Corporation
Mitsubishi Corporation [MSBHF]
Montello Resources Ltd.
Monument Resources, Inc. [MNMN]
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 Co.
NAL Energy Corporation
National Iranian Oil Company
National Oil Corporation
New Source Energy Corporation
New Source Energy Partners L.P.
Nexen Inc.
NGAS Resources, Inc.
Nicklos Drilling Company
Niko Resources Ltd.
Noble Corporation [NE]
Noble Drilling Services Inc.
Northern Oil and Gas, Inc. [NOG]
NuVista Energy Ltd.
NXT Energy Solutions Inc.

OAO Gazprom [OGZPY]
OAO NOVATEK
OAO Rosneft Oil Company
OAO Tatneft
Occidental Oil and Gas Corporation
Occidental Permian, Ltd.
OGX Petróleo e Gás Participações S.A.
Oil & Natural Gas Corporation Limited
Oil and Gas Development Company Limited
Oil Search Limited
One World Investments Inc.
Ophir Energy plc

Pace Oil & Gas Ltd.
Pacific Rubiales Energy Corp.
Pan Andean Resources PLC
Par Petroleum Corporation [DPTRQ]
Parallel Petroleum Corporation
Paramount Resources Ltd.
Patterson-UTI Energy, Inc. [PTEN]
Pavilion Energy Resources, Inc. [PVRE]
Peak Energy Services Ltd.
Pengrowth Energy Corporation [PGH]
Penn West Petroleum Ltd. [PWE]
Perpetual Energy Inc.
Perusahaan Pertambangan Minyak Dan Gas Bumi Negara
Petróleos Mexicanos
Petrel Resources Plc
Petro One Energy Corp.
Petro-Hunt, L.L.C.
PetroBakken Energy Ltd.
Petrobank Energy and Resources Ltd.
Petrobras America Inc.
Petroceltic International plc
Petrohawk Energy Corporation
PetroKazakhstan Inc.
Petrominerales Ltd.
Petsec Energy Ltd [PSJEY]
Peyto Exploration & Development Corp.
Phoenix Technology Income Fund
Pinnacle Gas Resources, Inc.
Pioneer Energy Services Corp.
Pioneer Oil and Gas
Pioneer Southwest Energy Partners L.P. [PSE]
PostRock Energy Corporation [PSTR]
Premier Oil plc [PMOIY]
President Petroleum Company PLC
Progress Energy Resources Corp.
Providence Resources, Inc. [PVRS]

Qatar Petroleum
QEP Resources, Inc. [QEP]
QGOG Constellation S.A.
Questerre Energy Corporation
Quicksilver Production Partners LP

Regal Petroleum plc
Resolute Energy Corporation
Rex Energy Corporation [REXX]
Roc Oil Company Limited
Rock Energy Inc.
Rock Energy Resources, Inc.
Rocky Old Man Energy Inc.
Rowan Companies, Inc. [RDC]
Ruspetro PLC
RWE-DEA AG

Sakhalin Energy Investment Company Ltd.
Salamander Energy plc
Samson Investment Company
Samson Oil and Gas Limited [SSN]
Sanchez Oil & Gas Corporation
SandRidge Energy, Inc. [SD]
Santonia Energy Inc.
Santos Ltd [STOSF]
Saudi Arabian Oil Co.
Saxon Energy Services Inc.
Seadrill Limited [SDRL]
Seadrill Partners LLC [SDLP]
SeaEnergy PLC
Sefton Resources, Inc.
Seneca Resources Corporation
Serica Energy plc
Sharon Energy Ltd.
SilverWillow Energy Corporation
SinoTech Energy Limited
SOCO International plc
Softrock Minerals Ltd.
Sonde Resources Corp. [SOQ]
Sonoro Energy Ltd.
Sperry Drilling Services
Standard Energy Corporation [STDE]
Statesman Resources Ltd.
Sterling Energy Plc
Sterling Resources Ltd.
Stetson Oil & Gas Ltd.
Strata Oil & Gas Inc. [SOIGF]
Sure Energy Inc.
Surge Global Energy, Inc. [SRGG]
Surgutneftegaz OAO [SGTZY]
Sword Energy Inc.
Syncrude Canada Ltd.

TAQA North Ltd.
Terra Nova Enegry Ltd.
Texalta Petroleum Ltd.
Texas American Resources Company
The Parkmead Group plc
Three Rivers Operating Company LLC
THUMS Long Beach Company
Torque Energy Inc.
Total E&P Joslyn Ltd
Total Energy Services Inc.
Tourmaline Oil Corp.
TRAFINA Energy Ltd.
TransAtlantic Petroleum Ltd. [TAT]
Transocean Ltd. [RIG]
Treaty Energy Corporation [TECO]
Trek Resources, Inc.
Tri-Valley Corporation
Tribute Resources Inc.
Trident Resources Corp.
Trilogy Energy Corp.
Trinidad Drilling Ltd.
Triple 8 Energy Ltd.
Trivello Energy Corp.
Tullow Oil plc [TUWLF]
Tuscany Energy Ltd.
Twin Butte Energy Ltd.
TXO plc

Union Drilling, Inc.
Unit Corporation [UNT]
Urals Energy Public Limited Company
Ute Energy Upstream Holdings LLC

Vanguard Natural Resources, LLC [VNR]
Vantage Drilling Company [VTG]
Venoco, Inc.
Vero Energy Inc.

W&T Offshore, Inc. [WTI]
Westbridge Energy Corporation
Western Canada Energy Ltd.
Western States International, Inc.
Whitecap Resources Inc.
Whiting Petroleum Corporation [WLL]
Windsor Energy Resources, Inc.
Winstar Resources, Ltd.
Wintershall Holding AG
Woburn Energy plc
Woodside Petroleum Ltd. [WOPEY]
WPX Energy, Inc.

XTO Energy Inc.
XXL Energy Corp.

Yangarra Resources Ltd.
Yoho Resources Inc.

Zapata Energy Corporation
ZaZa Energy Corporation [ZAZA]