P

P & M Petroleum Management LLC.
P. T. Indospec
Pacalta Resources Ltd.
Pacificorp Energy
Palm Energy Partners LLC.
Pan American Energy LLC.
Panaco Inc.
Panda Oil & Gas Corp.
Panhandle Eastern Pipeline Co.
Panther Creek Resources
Paragon Engineering Services Inc.
Pardee Exploration Co.
Park Avenue Exploration Corp.
Patara Oil & Gas
Paxton U.S. Inc.
Pearl Exploration & Production
Pecos Production Co.
Pegasus Capital Advisors LP.
Pel-Tex Oil Co.
Pendaries Petroleum Ltd.
Pendragon Resources II
Pennaco Energy Inc.
Pennsylvania Castle Energy Corp.
Penntex Resources LP.
Pennzenergy Co.
Penroc Oil Corp.
Peoples Energy Corp.
Peregrinus Participants Inc.
Perez Companac SA.
Permtex
Petech Enterprises Inc.
Petrie Parkman & Co.
Petro Capital Securities
Petro-Canada Resources
Petro-Guard Production LLC.
Petro-Star Energy
Petrobell Inc.
Petrocorp Inc.
Petroflow Energy Ltd.
Petroglyph Energy Inc.
Petrolatina Energy PLC.
Petrolera Santander Inc.
Petrolex Energy Corp.
Petroneft Resources PLC.
Petroreconcava SA.
Petrosearch Energy Corp.
Petrotex Engineering Co.
Petsec Energy Inc.
Phelps Dunbar LLP.
Phoenix Explorations Co. LP.
Pine Resources Corp.
Pinto Energy Venice LP.
Pioneer Resources USA Inc.
Placid Oil Co.
Plains Resources Inc.
Platform Resources Inc.
Player Petroleum Corp.
PM Lucas Enterprises Ltd.
Pogo Producing Co.
Porter & Hedges LLP.
Potato Creek LLC.
PPC Energy LP.
Prairie Petroleum LLC.
Praxair Inc.
Premier-Kufpec Exploration Pakistan
Presco Inc.
Preston Exploration LLC.
Preston, Thorgrimson, Shidler
Prima Energy Corp.
Prima Oil and Gas Co.
Primary Natural Resources Inc.
Prime Offshore LLC.
PrimeEnergy Corp.
Probe Resources Inc.
Productos Industriales Venezulanos SA.
Professional Development Institute
Projector SA.
Pronto Oil Field Services Ltd.
Province Resources
Pruet Offshore Co.
Public Gas Partners
Pure Petroleum LLC.
Pursuit Exploration Co. LL.
PYR Energy Corp.
P & P International Inc.
P. T. Karsarawat Pratama
Pacific Gas and Electric Co.
Pacifpetrol
Paloma Resources LLC.
Pan Canadian Resources
Panda Energy International Inc.
Panenergy Field Services Inc.
Pantera Energy Group LLC.
Panther Resources Corp.
Paramount Petroleum Co.
Pardee Minerals LLC.
Parker & Parsley Petroleum Co.
Patina Oil & Gas Corp.
Payne Investments Inc.
Pease Oil & Gas Co.
Pegasi Energy Corp.
Pegaz Energy Inc.
Pemex Exploracion y Produccion
Pendragon Energy Partners Inc.
Penn Virginia Oil & Gas
Pennpoint
Pennsylvania General Energy Corp.
Pennwell
Pennzoil Canada
Pentagon Petroleum
Peregrine Oil & Gas
Perenco
Permian Resources Inc.
Peru Power Holdings
Petra Petroleum Inc.
Petro Bank Energy & Resources Ltd.
Petro Equities Ltd.
Petro-Guard Co. Inc.
Petro-Hunt Corp.
Petrobank Energy Resources Ltd.
Petrobras America Inc.
Petrofac Resources International
Petroglobe Inc.
Petrogulf Corp.
Petroleos de Venezuela
Petroleum Inc.
Petrominerals Corp.
PetroQuest Energy LLC.
Petrosantander Inc.
Petrotech Resources
Petrovera Resources Ltd.
Peyto Exploration & Development
Phillips Petroleum Co.
Pico Petroleum Services & Investments
Pinnacle Resources
Pioneer Natural Resources USA Inc.
Pipeline & Processing Group Inc.
Plains Petroleum Co.
Plantation Resources Partners Ltd.
Playa Minerals & Energy Inc.
Pluspetrol International Inc.
Poco Petroleums Ltd.
Pomoco LLC.
Post Oak Energy Capital LP.
Powermax Energy Inc.
PPP LLP.
Prator Bett LLC.
Pray, Walker, Jackman, Williamson
Premium Resources Group LLC.
Presidio Oil Co.
Preston, Reynolds & Co. Inc.
PriceWaterhouseCoopers
Prima Exploration Inc.
Primary Energy Corp.
Prime Natural Resources Inc.
Prime West Energy Inc.
Probe Offshore LLC.
Probel Capital Management NV
Profertil SA.
Progress Fuels Corp.
Prokom Investments SA.
Prospect Energy Corp.
Prudential-Bache Capital Funding
PTT Exploration & Production
Public Works & Government Services Canada
Pure Resources Inc.
Pursuit Resources Corp.