Production at Statoil’s Gudrun oil and gas field has been halted following a suspected gas leak.
The company said it was unsure when the platform, in the Norwegian North Sea, would resume output.
The most recent data from the Norwegian Petroleum Directorate in November showed the Gudrun field produced 4.6million cubic metres of gas per day.
Statoil has a 51% stake in the field, with other partners GDF Suez owning a 25% share and OMV with 24%.