- Addax Petroleum
- Afren Energy Resources
- African Petroleum Oil Field Services
- Amni International Petroleum Development Company Ltd
- Amosco
- Ana Industries Limited
- Ariboil Company Limited
- AU
- Bell Oil & Gas
- B.G. Technical Ltd
- Bill & Melinda Gates Foundation
- BJ Services Company
- Brawal Shipping (Oil)
- Camac (Allied Energy Resources)
- CGG Veritas
- Chevron
- Ciscon
- Conoco Philips
- Conoil
- Department of Petroleum Resources
- DFID
- Drillog Petro-Dynamics Ltd
- Emex Systems
- Ensco Drilling Company (Nigeria) Ltd 35 Maloney Street Lagos Nigeria
- Equator Exploration Limited
- Expro
- ExxonMobil
- Famfa Oil
- First Fossil Nigeria
- Fugro Nigeria Limited
- Global Energy Group
- Hardy Oil & Gas Plc
- Intels Services Nigeria
- Kasolute
- Ladol
- Mabon Limited
- MacArthur
- MDG
- Melvon
- MI Swaco
- National Petroleum Investment Management Services
- NEPAD
- Nexen Inc
- Nigerian Association of Petroleum Explorationists
- Nigerian National Petroleum Corporation
- Nigerian Petroleum Development Company Ltd
- Noble Drilling
- Oil Data
- Oil Test Services
- Oriental Energy Resources Limited
- Pan Ocean Oil Corporation Nigeria
- Petrobras
- Petroleum Geo Services
- Petroleum Technology Association of Nigeria
- Petrolog
- Roxar
- Sahara Group
- Schlumberger
- Shell
- Snake Island Integrated Free Zone
- Socotherm Group
- Sowsco
- Statoil
- Sunlink Petroleum Limited
- Survicom
- Technip
- The African Development Bank
- The Ford Foundation
- The Rockefeller Foundation
- Total
- UNDP
- United Geo Physical
- United Nations Economic Commission for Africa (UNECA)
- US-Africa Development Foundation
- USAID
- Weafri
- WOG Allied Services Nigeria Ltd
- World Bank
- Zukus Industries Limited
