The Statoil-operated field Gina Krog in the North Sea was at the centre of a gas alert after suffering a leak just hours after coming on stream.
A 0.5 decilitre condensate leak was detected on Sunday following start up over the weekend.
Production was not online at the time.
A Statoil spokesman added: ” In line with instructions when general alarm on board the personnel mustered to the evacuation stations, situation cleared within 30 minutes, production processes then resumed and Gina Krog is now in normal operation.”
The recoverable reserves in from the field, located on the Utsira High, totals 16.8 million standard cubic metres (Sm3) of oil, 11.8 billion Sm3 of gas and 3.2 million tonnes of NGL.
The field was developed with a production facility resting on the seabed and an oil storage ship at a water depth of 110-120 metres.
The oil is exported via buoy loaders, and the gas is sent to the Sleipner A platform for final processing. Gas for injection is imported from Zeepipe 2A (Gassled).
This means that three out of four fields on the Utsira High are producing. Edvard Grieg started in November 2015, while Ivar Aasen followed in December of last year. Johan Sverdrup is expected to start producing in late 2019.
Gina Krog has been prepared for phasing in current and future discoveries in the area, and will be tied in to a planned joint solution to supply the Utsira High with power from shore. This will be in place in 2022.
Gina Krog was originally considered a minor gas discovery just north of Sleipner when it was discovered in 1974.
When oil and gas were proven in the neighbouring structure Gina Krog Øst in 2007, the Gina Krog landscape was reviewed again. Further delineation during the period 2008 to 2011 determined contact between Gina Krog and Gina Krog Øst and confirmed substantial volumes of oil under the entire structure.