BG Group http://www.bg-group.com/BHP Billiton http://www.bhpbilliton.com/home/businChevron Energía de México, www.chevron.comDiavaz OffshoreE&P Hidrocarburos y ServiciosEcopetrolGalp EnergiaHunt Overseas Oil Company http://www.huntoil.com/Inpex Corporation http://www.inpex.co.jp/english/Lukoil http://www.lukoil.com/ Murphy WorldwideNBL Mexico http://www.noblecorp.com/ONGC Videsh Limited http://www.ongcvidesh.com/Pacific Rubiales www.pacificrubiales.comPetrobras www.petrobras.comPlains Aquisitions CorporationShell exploracion y extraccionSierra Oil & GasTotal

http://www.diavaz.com/

www.ecopetrol.com.cohttp://www.galpenergia.com/ES/Paginas/Home.aspx

http://www.murphyoilcorp.com/Global-Operations/

http://www.fcx.com/resources/oilgas.htmhttp://www.shell.com.mx/http://www.sierraoilandgas.com.mx/#!about/c786http://www.total.com/en/

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