Erha Oil Field

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Nigeria Oil & Gas Fields

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Summary Information

  • Operator: Exxon
  • Country: Nigeria
  • Location: OML 133
  • Production start: 2006
  • Partners: Shell
  • Type: Oil
  • Estimated Reserves:
  • Production Volume:


  • The Erha and Erha North Project consists of 32 subsea wells tied back to a floating production, storage, and offloading (FPSO) vessel. A catenaryanchor-leg-mooring (CALM) buoy is used for crude-carrier docking and product transfer
  • Designed for the separation of oil, gas and water, ERHA FPSO has a storage capacity of 2.2 million barrels of oil and accommodates up to 100 personnel. The vessel hull, which was constructed in Korea, measures 285 meters in length, 63 meters in width and 33 meters in depth.
  • The Erha North Phase 2 project includes seven wells from three drill centers tied back to the existing Erha North floating production, storage and offloading vessel


  • Stolt Offshore: Contract for the flowlines and risers & fabrication and installation of flowlines on the Erha Drill Centre
  • SMOE  And Sembawang Shipyard:  Topside Facilities For Erha FPSO
  • Saipem: Engineering, procurement, construction, towing and commissioning of the FPSO
  • Manatee: Flow assurance lead role for concept, select & FEED phases, development of key operating strategies, and subsea tree expertise during the conceptual phase
  • Erha North
    • Subsea 7: Engineering, procurement, fabrication and installation of 25 kilometres of flowlines, 15 kilometres of umbilicals, and seventeen rigid jumpers. The scope also includes modifications to the FPSO in order to integrate it with the new subsea facilities.
    • Aker Solutions: Delivery of 2 dynamic and 2 static steel tube umbilicals, at a total length of 16.5 kilometres.
    • Nexans: Erha North E/H Umbilical


  • 2002 - Stolt Offshore awarded contract for the flowlines and risers
  • 2002 - Saipem awarded contract for the FPSO
  • 2004 - Erha North discovered
  • 2005 - Erha FPSO is completed
  • 2005 - Stolt Offshore awarded contract for fabrication and installation of flowlines on the Erha Drill Centre
  • 2006 - Oil production starts
  • 2013 - Subsea 7 awarded Erha North contract
  • 2015 - Erha North Phase 2 comes onstream



  1. Manatee Offshore References
  2. Nexans Norway Umbilical References
  3. SEMBship 2006
  4. Stolt Offshore Awarded Deepwater Contract In Nigeria
  5. Erha and Erha North Development
  6. SMOE  And Sembawang Shipyard  Complete Topside Facilities For Erha FPSO – One Of The  World’s Largest FPSOS
  7. Stolt Offshore Awarded $75 million Deepwater Contract Extension in Nigeria
  8. Saipem awarded two important contracts offshore Nigeria
  9. ExxonMobil Announces Startup of Nigeria Erha Development
  10. Subsea 7 S.A. awarded Ehra North contract
  11. Aker Solutions signs umbilical contract with ExxonMobil
  12. ExxonMobil Starts Oil Production at Erha North Phase 2 Project Ahead of Schedule and Well Under Budget

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