Ekofisk Oil Field

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Summary Information

  • Operator: ConocoPhillips
  • Country: Norway
  • Location: Norwegian continental shelf
  • Production start: 1971
  • Partners: Total - 39.90 %, ConocoPhillips - 35.11 %, Eni - 12.39 %, Petoro - 5.00 %, Statoil - 7.6 %
  • Type: Oil & Gas
  • Estimated Reserves: Original
    • 569.2 million Sm³ oil
    • 164.5 billion Sm³ gas
    • 15.2 million tonnes NGL
  • Production Volume:


  • Ekofisk heralded the start of the Norwegian oil age, it was the first commercially viable discovery on the Norwegian shelf and the first to start production
  • Ekofisk is an oil field located in the southern part of the North Sea. The water depth in the area is 70 - 75 metres. The field was produced to tankers until a concrete storage tank was installed in 1973.
  • The Ekofisk Complex comprises all installations which are connected with bridges on the central Ekofisk field.
  • Today, the operative parts of the Ekofisk Centre consist of the accommodation facilities, Ekofisk H and Ekofisk Q, the production facility Ekofisk C, the drilling and production facility Ekofisk X, the processing facility Ekofisk J and the production and processing facility Ekofisk M. From the wellhead facility Ekofisk A, located in the southern part of the field, production goes to the riser facility Ekofisk FTP for processing at the Ekofisk Centre. The pipeline from production facility Ekofisk B in the northern part of the field is routed to Ekofisk M. Ekofisk K is a facility for water injection.
  • The Complex is a field centre and hub for the production from the Ekofisk field itself, and from the other fields in the Greater Ekofisk Area.
  • In addition, production from other fields in the area has been - and is - transported via the Ekofisk Complex to the receiving terminals in Emden, Germany (gas) and Teesside, UK (oil)
  • The gas is transported on the Norpipe Gas Pipeline, the oil on the Norpipe Crude Oil Pipeline


  • Verolme (Cork) Ltd/John Brown Offshore: Ekofisk Modules
  • Acergy: installation of an oil transportation pipeline between the Ekofisk and Eldfisk platforms
  • Aibel:
    • Front-end Engineering and Development (FEED) work for the Ekofisk Utility and Accommodation Topsides replacement
    • Modifications on several of the platforms at the Ekofisk field in order to hook up a new wellhead platform (2/4-Z)
  • Saipem:
    • The Greater Ekofisk Area Development living quarters, bridge support and wellhead platforms
    • 2/4-S Jacket and Tripod Removal
  • Kvarner:
    • 2/4G - Riser Deck & Riser Bridge
    • 2/4 J - Utilities Module, Deck, Heli-deck, Topside, Jacket and Piles
    • 2/4K - W-Jacket and Piles
    • 2/4L - Bridge Support Jacket and Piles, Jacket and Piles
    • 2/4M - Jacket and Piles, Tripod and Piles
    • 2/4X - Jacket and Piles
    • Quarters Jacket and Piles
    • Albuskjell - Drilling Jacket and Pile
  • BiFab: Ekofisk II - Engineering, Procurement and Construction of 100T 2 Storey Office Modules


  • 1969 - The Ekofisk discovery in was announced just before Christmas
  • 1971 - Ekofisk came onstream
  • 1977 - Ekofisk also saw the largest oil spill ever on the Norwegian shelf, the Bravo blowout. It took American well killer specialists eight days and nights to stop the blow-out.
  • 1980 - The Alexander Kielland accident led to the loss of 123 lives
  • 1987 - Water injection started up in a part of the field
  • 2003 - Aker Kvaerner chosen to build new platform
  • 2006 - Acergy S.A. Awarded Pipelay Contract for connection to Eldfisk
  • 2011 - Ekofisk South project launched
  • 2013 - Wellhead platform delivered


  • Ekofisk is a chalk field. Chalk is porous and can contain a lot of oil and gas, but the flow rates are low.
  • Ekofisk was originally developed by pressure depletion and had an expected recovery factor of 17 per cent. Since then, limited gas injection and comprehensive water injection have contributed to a substantial increase in oil recovery.
  • Water injection started up in a part of the field in 1987, and has been so successful that it has led to numerous expansions.
  • Without water injection, less than 20 per cent of the oil in Ekofisk would have been produced.
  • With the current plans, the operator expects to recover more than half the oil originally in the reservoir.


  1. Ekofisk, NPD
  2. Saipem Fixed Offshore Production Facilities Project References
  3. International Protective Coatings Platform References
  4. Jotun Platform References
  5. FoundOcean Subsea References
  6. Kvaerner Topsides References
  7. Kvaerner Platform References
  8. FMC Technologies Awarded $75 Million Contract to Support Ekofisk Field
  9. Contract for new Ekofisk platform
  10. 40th anniversary for Ekofisk
  11. ConocoPhillips, Ekofisk
  12. Statoil, Ekofisk
  13. Acergy S.A. Awarded Pipelay Contract in Norway
  14. Norway: Total launches the Ekofisk South and Eldfisk II projects
  15. Aibel awarded FEED study for new Ekofisk topsides
  16. Major Ekofisk contracts For Aibel
  17. Giant contract For Aibel at Ekofisk
  18. Aker Solutions delivers wellhead platform to ConocoPhillips
  19. ConocoPhillips has received consent to use a new accommodation facility at Ekofisk

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