ExxonMobil

corporate.exxonmobil.com

Chevron

regionSan Ramon, California

chevron.com

BP

regionUnited Kingdom

bp.com

ConocoPhillips

conocophillips.com

Eni

regionRome, Italy

eni.com

BHP Billiton

regionMelbourne, Australia

bhp.com

Imperial Oil (Esso)

parent coExxonMobil

regionCalgary, Alberta

imperialoil.ca

Constellation

theconstellation.com

Devon Energy

regionOklahoma City, Oklahoma

devonenergy.com

Gulf

parent coHinduja

gulfoil.com

Phillips 66

phillips66.com

Seadrill

seadrill.com

Apache

apachecorp.com

Woodside Energy

regionPerth, Australia

woodside.com.au

Energy Transfer

regionDallas, Texas

energytransfer.com

Husky

parent coCenovus

regionCanada

huskyenergy.com

Sunoco

sunoco.com

Range

regionAustralia

rangeresources.co.uk

Evaluate Energy

regionLondon, United Kingdom

evaluateenergy.com

Zenith Energy

regionCalgary, Alberta

zenithenergy.ca

ThreeD Capital

regionToronto, Canada

threedcapital.com

Parkland

regionCalgary, Alberta

parkland.ca

Calima Energy

regionPerth, Australia

calimaenergy.com

Otto Energy

regionPerth, Australia

ottoenergy.com

Magellan Midstream Partners

regionTulsa, Oklahoma

magellanlp.com

Rodinia Oil*

McDermott

mcdermott.com

MCW Energy Group

Meg Energy

regionCanada

Millennium Energy

regionUnited States

Mira Resources

Mitchell Services

regionAustralia

mitchellservices.com.au

Mitsui & Co.

regionJapan

mitsui.com

MOL

molgroup.info

Monarch Energy

Monarch Gulf Exploration

regionUnited States

Mooncor Oil & Gas

MOP Environmental

regionUnited States

Morumbi Resources

Mount Dakota Energy

Mountainview Energy

Naftobudowa

Nanalysis Scientific

regionVancouver, Canada

nanalysis.com

Nation Energy

regionCanada

National Iranian Oil

regionIran

National Oil & Gas

natloil.com

National Oil Kenya

nationaloil.co.ke

National-Oilwell

Nationwide Utilities

regionCanada

Nautilus Marine Services

parent coHKN

nautilusmarineplc.com

Nepal Oil

New Dimension Resources

New Guinea Energy

regionAustralia

New Jersey Resources

regionWall, NJ

New West Energy Services*

Newton Energy

Nexen

parent coCNOOC

nexencnoocltd.com

Next Fuel

regionUnited States

Nextraction Energy

regionCanada

Nexus Energy Services

regionUnited States

NGEx Minerals

regionVancouver, BC

ngexminerals.com

Nizhnekamskneftekhim

regionNizhnekamsk, Russia

nknh.ru

Noble

noblecorp.com

Noble Midstream Partners

nblmidstream.com

Nord Stream

Nordic Oil and Gas

North Atlantic Drilling

regionBermuda

North Springs Resources

regionUnited States

Norwest Energy

regionAustralia

norwestenergy.com.au

Nu-Oil and Gas

nu-oilandgas.com

NuStar Energy

nustarenergy.com

Nuverra

nuverra.com

NXT Energy Solutions

regionCanada

OBI

obi.com

Obsidian Energy

regionCanada

obsidianenergy.com

Occidental

oxy.com

Oceaneering

oceaneering.com

Octagon 88 Resources

regionSwitzerland

Octant Energy

Oil Search*

regionPapua New Guinea

OMDA Oil and Gas

regionUnited States

ÖMV

regionAustria

omv.com

OMV Petrom

parent coOMV

regionRomania

petrom.com

One World Investments

Oracle Energy

Orca Exploration Group

regionTanzania

Origin Clear

originclear.com

Oryx Petroleum

regionCalgary, Alberta

oryxpetroleum.com

Oyster Oil & Gas

Pacific Coast Oil

Pacific Drilling

pacificdrilling.com

Pacific Rubiales Energy

regionCanada

pacificrubiales.com

Packers Plus Energy Services

Palliser Oil & Gas

Pan African Oil

Pan Orient Energy*

PanTerra Resource

Paradigm Oil and Gas

regionUnited States

ParaFin

regionUnited States

Paramount Resources

regionCanada

paramountres.com

Paris Energy

Parker Drilling Co.

parkerdrilling.com

Partex

regionPortugal

partex-oilgas.com

Passport Energy

Patriot Petroleum

Patterson-UTI

patenergy.com

PBF Energy

regionParsippany, New Jersey

pbfenergy.com

Petróleos de Venezuela (PDVSA)

regionVenezuela

pdvsa.com

Pembina Pipeline

pembina.com

Pemex

regionMexico

Pengerang Integrated Petroleum Complex (PIPC)

jpdc.gov.my

Pennine Petroleum

PERENCO

perenco.com

Perkins Oil & Gas

Perpetual Energy

regionCanada

perpetualenergyinc.com

Perusahaan Gas Negara

regionIndonesia

Petra Energy

regionMalaysia

petraenergy.com.my

Petrichor Energy*

Petro Canada

parent coSuncor

regionCanada

petro-canada.ca

Petroleum Geo-Services (Petro Geo)

regionNorway

Petro One Energy

Petro Vista Energy

PetroBangla

regionbd-dhaka

petrobangla.org.bd

Petróleo Brasileiro S.A.

regionBrazil

petrobras.com.br

Petrodorado Energy

PetroFrontier

Petrol AD

Petrol Group

Petrolera

petroleraargentina.com.ar

Petroleum Air Services

Petroleum Coke Industries

regionKuwait

pcickw.com

Petroleum Wholesale

petroleumwholesale.com

Petrolia

Petrolympic

Petromanas Energy

Petromin Resources

PETRONAS

regionMalaysia

petronas.com

Petrosalam

PetroShale

Petrostar Petroleum

Petroteq Energy

regionCanada

PetroValue

regionPenticton, BC

petrovalue.ca

Petrox Resources

Peyto Exploration & Development

peyto.com

Pharos Energy

regionLondon, United Kingdom

pharos.energy

Phoenix Canada Oil

Pine Cliff Energy*

Pioneer Energy

parent coParkland Fuel

regionCanada

pioneer.ca

Platino Energy

Pledge Petroleum

regionUnited States

Point Loma Resources defunct

regionCalgary, Alberta

Poplar Creek Resources

Porto Energy

Power Resource Exploration

regionCanada

Prestige Capital

regionUnited States

Primeline Energy

primelineenergy.com

ProAm Explorations

ProPetro

propetroservices.com

Providence Resources

regionUnited States

providenceresources.com

PT Lapindo Brantas

Pulse Seismic

regionCanada

Q Investments

QEP Resources

regionDenver, Colorado

qepres.com

Quintana Energy Services (QES)

regionHouston, Texas

quintanaenergyservices.com

QPD

regionQatar

qpd-jp.com

Quattro Exploration and Production

Questfire Energy

Raimount Energy

ReconAfrica

reconafrica.com

Red Oak Mining

Red Pine Petroleum

Redwater Energy

Relentless Resources

Torchlight Energy

regionPlano, Texas

torchlightenergy.com

United Energy

regionUnited States

Unit Corporation

unitcorp.com

UI Energy

regionSouth Korea

Tuscany Energy

Turner Valley Oil & Gas defunct

regionHouston, TX

Trophy Resources

regionUnited States

TrinCan Capital

Trilogy Energy

trilogyenergy.com

Trican Well

regionCanada

Tribute Resources

Trek Resources

regionUnited States

trekresources.com

Transocean

regionZug, Switzerland

deepwater.com

Transeuro Energy

TransAtlantic Petroleum,

TransAmerican Energy

Trans Mountain

transmountain.com

Trammo

trammo.com

TPC

regionTabriz, Iran

tpco.ir

TotalEnergies

regionFrance

totalenergies.com

Taylor Energy defunct

regionNew Orleans, LA

Terra Energy & Resource Technologies

regionUnited States

Terra Energy

regionCalgary, Alberta

Terpel

Tellurian

tellurianinc.com

Tamoil

Taipan Resources