OSLO, Norway – The Norwegian Petroleum Directorate (NPD) has submitted its assessment of Statoil’s amended plan for development and operation (PDO) for the Gullfaks field in the North Sea to Norway’s Ministry of Petroleum and Energy.
This concerns production from the Shetland group and Lista formation, located above the main reservoir.
Test production from this formation has been operating for a few years. Statoil believes it can produce 20 MMbbl from Shetland/Lista, which was not included in the original development plan approved by Norway’s parliament (Storting) in 1981.
The new scheme involves investing NOK 1.8 billion ($217 million) in re-using existing wells on Gullfaks for producing this formation.
In the past, Shetland/Lista was not considered to be a reservoir, but subsequent operations have proven that recoverable oil is present.
The zones above the Gullfaks reservoir are under natural high pressure, which makes drilling wells on Gullfaks relatively complex. Moving to production from Shetland/Lista, NPD suggests, could make it easier to drill on Gullfaks in the future.
Statoil’s plan also calls for collection of large amounts of data that may provide a basis for subsequent phases of production from Shetland/Lista, possible via pressure support.
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