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COMPANY O
OMDA Oil and Gas [OTC:OOAG] - Interests in oil and gas wells in Louisiana and Texas.
OMV Group [XETRA:OMVV] - Leading oil and natural gas group in Central and Eastern Europe
OPTI Canada [TSX:OPC] - Oil sands.
OSE [TSX-V:OSE] - Holds producing oil and gas leases interests in Ontario (Canada) and Texas (USA), and has significant petroleum exploration leases and prospects rights in Texas and Montana, USA.
Oracle Coalfields [ISDX:ORCP] - Explore for and extract coal in the Sindh Province of Pakistan
Oasis Petroleum [NYSE:OAS] - Williston Basin.
obeleoil - Exploring, developing and operating crude oil and natural gas properties within the continental U.S. for more than 25 years
Occidental Petroleum [NYSE:OXY] - Core oil and gas operations in the United States, Middle East and Latin America
Oceaneering [NYSE:OII] - global oilfield provider of engineered services and products, primarily to the offshore oil and gas industry, with a focus on deepwater applications.
Oceanscan - Supplier of survey equipment, personnel and products to the offshore hydrographic, survey, ROV and defence industries.
Octane Energy Services is now Newton Energy
Octanex [ASX:OXX] - North West Shelf area, offshore Western Australia.
Odin Energi [private] - Danish oil company with exploration and production licenses in Lithuania and Denmark
Odyssey Energy [ASX:ODY] - Utah and Oklahoma
Odyssey Petroleum is now Petrichor Energy
Offshore Logistics is now Bristow Group
Oil and Natural Gas Corporation Limited [BOMABY:ONGC] - Full-fledged horizontally integrated petroleum company. Highest profit making company in India.
Oil Basins [ASX:OBL] - Offshore Gippsland Basin and the onshore Canning Basin
Oil Engineering Limited is part of Isleburn, a subsidiary of Global Energy Group
Oil Refineries [State of Israel - 74% : Israel Corporation Ltd. - 26%] - The only Company in Israel refining crude oil and supplying petroleum products
Oil States [NYSE:OIS] - Operates in four market segments: Offshore Oil and Gas, Land Oil and Gas, Defense and General Industry.
Oilex [ASX:OEX] - Projects in Queensland and New South Wales
Oilsands Quest [AMEX:BQI] - Second largest prospective land position in the Athabasca Tar Sands Region
Oilsearch [ASX:OSH] - Oil and gas exploration and development company that has been operating in Papua New Guinea since 1929.
Olis - One of the 20 largest corporations in Iceland, serving its customers with energy and related products in the company and consumer markets
Olympia Energy was acquired by Provident Energy Trust
Oman Oil Company [100 % owned by the Government of the Sultanate of Oman.] - Pursuing investment opportunities in the energy sector both inside and outside Oman.
Omni Energy Services [private] - Diversified seismic support companies
Oneok [NYSE:OKE] - Diversified energy company involved in oil and gas production, natural gas processing, gathering, storage and transmission in the mid-continent areas of the United States
ONEOK Partners [NYSE:OKS] - One of the largest publicly traded master limited partnerships and own one of the nation's premier natural gas liquids (NGL) systems.
Opal Energy [TSX-V:OPA] - Focus on natural gas exploration targets in South Texas
Open Range Energy [TSX:ONR] - Operations in the Deep Basin region of west central Alberta.
Ophir Energy [LSE:OPHR] - Extensive portfolio of exploration interests consisting of 17 projects in nine jurisdictions in Africa.
Oracle Energy [TSX-V:OEC] - Oil and gas fields in Romania and Yemen
Oranje-Nassau Energie [private] - North Sea offshore (Netherlands and United Kingdom), West Africa (Gabon) and South America (Colombia).
Orchard Petroleum was acquired by Mercuria Energy Group
Origin Energy [ASX:ORG] - Provides gas and electricity to over two million Australian homes and businesses.
Orion Oil & Gas merged with WestFire Energy
Orleans Energy is now RMP Energy
Orlen Group [OTC:PSKNY] - Poland refiner
Ormat Technologies [NYSE:ORA] - Solutions for geothermal power, recovered energy generation (REG) and remote power.
Osage Exploration and Development [OTC:OEDV] - Independent oil and gas company with operations in the US and South America.
Osyka [OTC:OSKA] - Gulf Coast of North America (Texas/Louisiana/Mississippi)
Otto Energy [ASX:OEL] - Turkey, Philippines, and Argentina.
Outrider Energy [CNSX:MCF] - Oil, gas and other mineral leases in Pinedale Field, Sublette County, Wyoming
Oversize Image Solutions - Custom software solutions for processing oversized and very large images such as well log images.
Oxbow [private] - Fuel distribution services
Oxford Resource Partners [NYSE:OXF] - Low cost producer of high value steam coal and the largest producer of surface mined coal in Ohio.


COMPANY P
PEMEX - National oil company of Mexico
PHI [NASSDAQ:PHII] - Helicopter services
PRD Energy [TSX-V:PRD] - Western Canada
PTT Exploration and Production Public Company Limited [Thailand:PTTEP] - National petroleum exploration and production company dedicating to provide a sustainable petroleum supply to Thailand
PYR Energy was acquired by Samson Investment Company
Pace Oil & Gas [TSX:PCE] - Intermediate oil and gas company focused in Alberta.
Pacific Blue Energy [OTC:PBEC] - Actively pursuing the development of several renewable energy projects
Pacific Coal is now Rio Tinto Coal Australia
Pacific Energy Partners was acquired by Plains All American Pipeline LP
Pacific Ethanol [NASDAQ:PEIX] - Our product line currently emphasizes clean-burning corn-based ethanol.
Pacific Oil Company [OTC:POIL] - Producing energy projects that are located in Saskatchewan Canada.
Pacific Rodera [TSX-V:PRD] - Engaged in the exploration for, and development and production of, natural gas and light oil reserves primarily in the Province of British Columbia and in the Northwest Territories.
Pacific Rubiales Energy [TSX:PRE] - Largest independent oil and gas exploration and production company in Colombia.
Pacific Stratus Ventures is now Pacific Rubiales Energy
Painted Pony Petroleum [TSX-V:PPY.A] - Western Canadian Sedimentary Basin.
Palko Environmental [TSX:PLK] - Provides waste management and resource recovery solutions to the oil and gas industry in western Canada.
Palliser Oil & Gas [TSX-V:PXL] - Heavy oil production in the greater Lloydminster area of Alberta and Saskatchewan
Palo Duro Energy [TSX-V:PDE] - Palo Duro Basin is located in the Texas Panhandle
Pan Orient Energy [TSX-V:POE] - Thailand and Indonesia.
Pan Pacific Petroleum [ASX:PPP] - Interests in New Zealand (including production from the Tui Area Fields), Australia, Vietnam and Timor Leste-Australia Joint Petroleum Development Area.
Panax Geothermal [ASX:PAX] - Australia, India, and Slovakia
Pancontinental Oil & Gas NL [ASX:PCL] - Holds oil & gas exploration assets in: Australia, New Zealand, Malta. and Kenya
Pan-Global Energy was acquired by Pearl Exploration and Production
Pan-Ocean Energy assets were acquired by Addax Petroleum
Panhandle Oil and Gas [NYSE:PHX} - Oil and gas holdings, including its mineral acreage and its interests in producing wells, both working interests and royalty interests, are centered in Oklahoma.
Panoro Energy ASA [OSLO:PEN] - Balanced portfolio of high quality assets in the South Atlantic region
PanTerra Resource [TSX-V:PRC] - Shallow and Shale Gas in the Province of Saskatchewan, Canada.
Pantheon Resources PLC [LSE:PANR] - Gulf Of Mexico (Texas and Louisiana)
Paradigm Oil and Gas [OTC:PDGO] - Interests in Alberta.
Paradym Ventures is now Pacific Paradym Energy
Paramount Energy is now Perpetual Energy
Parallel Petroleum LLC - Operations are primarily concentrated in the Permian Basin of West Texas and New Mexico, the largest onshore oil and natural gas basin in the United States.
Parex Resources [TSX-V:PST] - Llanos Basin of Colombia and onshore Trinidad and Tobago.
Parkland Energy Services [TSX-V:PKE] - Manufacture and sale of oilfield equipment
Pason Systems [TSX:PSI] - Drilling instruments
Patch International [OTC:PTCHF] - Canadian Oil Sands Exploration Company
Patina Oil and Gas was acquired by Noble Energy
Patriot Petroleum [TSX-V:PPC] - Oil and gas interests in Louisiana and Wyoming.
Patterson-UTI [NASDAQ:PTEN] - Provides onshore contract drilling services to exploration and production companies in North America
Pe Ben Industries is part of Mullen Group
Peabody Energy Corp [NYSE:BTU] - Largest coal company in the world.
Peak Oil and Gas [ASX:PKO] - Philippines, Indonesia, Thailand and New Zealand.
Pearl Exploration and Production is now BlackPearl Resources
Peat Resources [TSX-V:PET] - Mission is to establish the viability of peat as an alternative fuel for existing power stations
Peerless Energy was acquired by Petrobank Energy and Resources Ltd.
Pegasi Energy Resources [OTC:PGSI] - Holds interests in properties located in Marion and Cass County, Texas
Pegasus Oil and Gas was acquired by Harvest Energy
Pembina Pipeline Corporation [TSX:PPL] - Energy transportation and service provider
Pengrowth Energy Trust [NYSE:PGH] - Canadian oil and gas producer
Penn Octane Corporation [OTC:POCC] - One of the largest exporters of LPG from the US borders into Mexico
Penn Virginia Corporation [NYSE:PVA] - Exploration, development and production of oil and natural gas primarily in the eastern and Gulf Coast onshore areas of the United States
Penn Virginia Resource Partners [NYSE:PVA] - Manages coal properties and related assets and operates a midstream natural gas gathering and processing business.
Penn West Energy Trust [NYSE:PWE] - Exploration and development activity in the Western Canadian Sedimentary Basin
Pennaco - Oil and gas corporation engaged in ongoing leasing, marketing, exploration, and drilling operations for natural gas and crude oil.
Pennant Energy [TSX-V:PEN] - West Central Alberta and Manitoba
Pennine Petroleum [TSX-V:PNN] - Active in Alberta, Saskatchewan, and British Columbia
Pennzoil - Acquired by Shell Oil Company, an affiliate of the Royal Dutch/Shell Group of Companies.
Perdana Petroleum [Kuala Lumpur:7108] - Provides Offshore Marine Services for the upstream oil ang gas industry
Perenco - Operating in Gabon, Colombia, Cameroon, Turkey, Tunisia, Venezuela, Guatemala, Ecuador, Democratic Republic of Congo, Republic of Congo, Eritrea, U.S.A. and U.K.
Perisai Petroleum Teknologi Bhd [Kuala Lumpur:0047] - Offshore service provider.
Perpetual Energy [TSX-V:PMT] - Independent energy company producing primarily natural gas with growing volumes of oil and liquids from properties in Alberta, Canada.
Peru Petro [Private Law State Company] - Responsible for promoting the investment of hydrocarbon exploration and exploitation activities in the country.
Petra Petroleum [TSX-V:PTL] - Oklahoma and Mississippi
Petrel Resources [LSE:PET] - focus of operations is Iraq
Petratherm [ASX:PTR] - geothermal resources
Petro Canada is now Suncor
Petro Field Industries merged with Empire Industries
Petro Kazakhstan [NYSE:PKN] - Operations in the Republic of Kazakhstan
Petro Uno Resources was acquired by Renegade Petroleum
Petro Viking Energy [TSX-V:VIK] - Light oil Viking resource lands in West Central Saskatchewan
Petro Vista Energy [TSX-V:PTV] - Brazil and Colombia
Petro-Reef Resources [TSX-V:PER] - Crude oil and natural gas exploration and production company with producing properties in Alberta, Canada.
Petroamerica Oil [TSX-V:PTA] - Colombia
PetroBakken Energy is now Lightstream Resources
Petrobank Energy and Resources [TSX:PBG] - Operations in western Canada and Colombia
Petrobras Energia [NYSE:PZE] - Key producing assets are in Argentina and Venezuela
Petroceltic International plc [LSE:PCI] - Primary focus is oil and gas exploration and production in North Africa, the Mediterranean and offshore Ireland.
PetroChina [NYSE:PTR] - Broad range of petroleum-related activities
Petrodorado Energy [TSX-V:PDQ] - Colombia, Peru and Paraguay.
Petrofac [LSE:PFC] - Integrated international service provider to the oil & gas industry.
PetroFrontier [TSX-V:PFC] - Onshore petroleum and natural gas assets in the South Georgina Basin, Australia.
Petrofund Energy Trust was acquired by Penn West Energy Trust
PetroGlobe [TSX-V:PGB] - Oil and gas prospects in Western Canada and the United States
Petrohawk Energy was acquired by BHP Billiton
PetroKamchatka Plc [TSX-V:PKP] - Kamchatka Peninsula, Russia.
PetroLatina Energy plc [LSE:PELE] - Independent petroleum exploration, development and production company focused on Latin America
Petroleos Brasilas [NYSE:PBR] - Brazil-based, also present in other countries, namely Angola, Argentina, Bolivia, Colombia, Nigeria, and the United States
Petroleos de Venezuela [State oil Company] - Distributes gasoline in United State via CITGO
Petroleum Company of Trinidad and Tobago Limited - Integrated oil company is fully owned by the Government of the Republic of Trinidad and Tobago.
Petroleum Corporation of Jamaica [state] - Mandated to develop indigenous renewable energy resources,
Petroleum Development [NASDAQ:PETD] - Appalachian Basin, Michigan and the Rocky Mountains
Petroleum Geo Service [NYSE:PGS] - Operates in two primary business areas - seismic and production
Petroleum Helicopters is now PHI
Petrolia [TSX-V:PEA] - Petroleum exploration in Quebec
Petrolifera Petroleum [TSX:PDP] - Production activity in South America.
Petrolympic [TSX-V:PCQ] - Actively exploring for premium light crude oil and natural gas in Quebec, Canada
Petromanas Energy [TSX-V:PMI] - exploration and development of its assets in Albania
Petromin Resources [TSX-V:PTR] - China and Kuwait. Oil and gas producing properties in Alberta Canada along the Western Canada Sedimentary Basin.
Petrominerales [TSX:PMG] - 80.7% owned by Petrobank Energy and Resources Ltd. (TSX: PBG), is headquartered in Bogotá, Colombia
Petrominerals Corporation [OTC:PTRO] -
Petronas - Malaysia's national petroleum corporation
Petroquest Energy [NYSE:PQ] - Oil and natural gas reserves in East Texas, Arkoma Basin, South Louisiana and the shallow waters of the Gulf of Mexico.
PetroSands Resources is now CanRock Energy
Petrostar Petroleum [TSX-V:PEP] - Saskatchewan, Canada
PetroVietnam - Activities cover all the operations from oil and gas exploration and production to storage, processing, transportation, distribution and services.
Petsec [ASX:PSA] - focused on the shallow waters of the Gulf of Mexico, USA and Beibu Gulf, China
Peyto Exploration and Development [TSX:PEY] - Assets are concentrated in premier gas exploration area, the Alberta Deep Basin.
Phoenix Oilfield Hauling [TSX-V:PHN] - Serves the oil and gas industry in Alberta.
Phoenix Technology Services - [TSX:PHXu] - Directional and horizontal drilling company
Pike River Coal [ASX:PRC] - Hard coking coal
Pine Cliff Energy [TSX-V:PNE] - Western Canada and South America
Pinecrest Energy [TSX-V:PRY] - Light oil resources in the provinces of Alberta and Saskatchewan
Pioneer Oil and Gas [OTC:POGS] - Nevada and Wyoming
Pioneer Drilling Company [AMEX:PDC] - Land contract drilling services to independent and major oil and gas exploration and production companies
Pioneer Natural Resources [NYSE:PXD] - Operates in the U.S., Argentina, Canada, Gabon, South Africa and Tunisia.
Pioneer Southwest Energy Partners [NYSR:PSE] - Limited partnership formed by Pioneer Natural Resources Company to own producing oil and gas properties in the Spraberry field in the Permian Basin of West Texas
Plains All American Pipeline [NYSE:PAA] - Operations are concentrated in Texas, Oklahoma, California and Louisiana and in the Canadian provinces of Alberta and Saskatchewan
Plains Exploration and Production [NYSE:PXP] - California, Texas, Louisiana, and the Gulf of Mexico.
Planet Gas [ASX:PGS] - Coal Bed Methane (CBM) and Geothermal energy exploration and development company.
Platform Resources is now Alberta Oilsands
Platts Oil - Gives decision-makers the most timely, unbiased and accurate news and pricing on the global energy, petrochemical, and metals markets.
The Plaza Group - International petrochemical marketing company headquartered in Houston, Texas.
Plug Power [NASDAQ:PLUG] - Fuel Cell Technology
Po Valley Energy [ASX:PVE] - Italy
Pogo Producing was acquired by Plains Exploration and Production
Polarcus Limited [Oslo:PLCS] - Marine geophysical company with a pioneering environmental agenda, specializing in high-end towed streamer data acquisition from Pole to Pole.
Polaris Geothermal was acquired by Ram Power
Poplar Creek Resources [TSX-V:PCK] - Current production of approximately 40 boe/day.
Portal Resources [TSX-V:PDO] - Pursuing unconventional oil and gas opportunities in the Western Canadian Sedimentary Basin, Alberta and Saskatchewan
Porto Energy [TSX-V:PEC] - Portugal
Portrush Petroleum is now Westbridge Energy Corporation
PostRock Energy [NASDAQ:PSTR] - oil and natural gas primarily in the Cherokee Basin of Kansas and Oklahoma.
Prairie Pacific Energy Corporation was acquired by Northrock Resources (now minerals)
Prairie Schooner Petroleum is part of True Energy Trust, now Bellatrix Exploration
Precision Drilling [NYSE:PDS] - Contract drilling services to the Canadian oil and gas industry.
Precision Petroleum Corporation [OTC:PPTO] - Montana and Oklahoma
Preem Petroleum AB - Refiner in Sweden.
Premier Oil [LSE:PMO] - Producing in the UK, Indonesia, and Pakistan
Premcor was acquired by Valero
President Petroleum [LSE:PPC] - Gas and oil production onshore in Louisiana USA and significant prospectivity in onshore exploration licences in Australia.
Pride International was acquired by ENSCO plc
Prima Energy was acquired by Petro-Canada
PrimeEnergy Corporation [NASDAQ:PNRG] - Properties are located in Texas, Oklahoma, West Virginia, the Gulf of Mexico, New Mexico and Louisiana
Primeline Energy [TSX-V:PEH] - Focusing exclusively on oil and gas exploration and upstream opportunities in China.
Primera Energy Resources was acquired by Touchstone Exploration
PrimeWest Energy Trust is part of TAQA
Probe Resources is now Rooster Energy
Process Capital [TSX-V:POR] - Designs, manufactures and installs turnkey waste oil micro-refineries.
Producers Oilfield Services is part of Mullen Group
ProEX Energy merged with Progress Energy Trust to form Progress Energy Resources
Progress Energy Resources - [TSX:PRQ] - Northwest Alberta and northeast British Columbia.
Proper Power and Energy [OTC:PPWE] -
Prophecy Coal [TSX:PCY] - Internationally diversified thermal coal production company.
ProSafe [Oslo:PRS] - Leading owner and operator of semi-submersible service rigs, a leading platform drilling contractor in Norway and a major owner and operator of floating production- and storage vessels outside the North Sea.
ProspEx Resources [TSX:PSX] - Focused on exploration for natural gas in the Western Canadian Sedimentary Basin.
Providence Resources [LSE:PVR] - International upstream oil and gas company currently actively involved in Ireland, UK and in Nigeria (West Africa).
Provident Energy Trust [AMEX:PVX] - Western Canada portfolio of oil and gas production and natural gas liquids fractionation assets, along with oil production in southern California
Pryme Oil and Gas [ASX:PYM] - Onshore oil and gas resources in the southern United States.
Pulse Data [TSX:PSD] - Marketing and licensing seismic data in Western Canada
Pura Vida Energy [ASX:PVD] - Morocco
Pure Energy Resources was acquired by BG Group
Pure Energy Services [TSX:PSV] - Energy services
Pyramid Oil Company [AMEX:PDO] - Oil and gas leases located within Kern and Santa Barbara Counties


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Updated 12 April 2016
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