Equinor has discovered oil and gas in exploration well 30/6-C-2 A ('Lambda'), about four kilometres west of the Oseberg field in the North Sea.

Equinor is the operator of production licence 053, where the other licensees are Petoro, Total and Conoco Phillips.

The well was drilled from the Oseberg C platform. Photo: Øivind Hagen/Equinor

Discoveries were made in two different formations. Preliminary estimates place the size of the discovery in the Eiriksson Formation between 0.2 and 0.4 million standard cubic metres of recoverable oil equivalent.

And the preliminary size estimate for the discovery in the Cook Formation is between 0.2 and 1.0 million standard cubic metres of recoverable oil equivalent.

These discoveries represent important additional resources for Oseberg. Equinor and its partners will continue to work to improve understanding of the discovery and to identify production solutions for the oil and the gas.

The well was drilled from the Oseberg C platform, which is an integrated production, drilling and living quarters platform in the northern part of the field. Oseberg was proven in 1979, and came on stream in 1988.

Geological information

The primary exploration target for the well was to prove petroleum in Upper Triassic to Middle Jurassic reservoir rocks in the Statfjord Group. The secondary exploration target for the well was to prove petroleum in Lower Jurassic reservoir rocks in the Cook Formation.

Well 30/6-C-2 A encountered about 23 metres of oil and gas-filled sandstone with good reservoir quality in the Eiriksson Formation in the Statfjord Group. In the Cook Formation, the well encountered about 15 metres of oil and gas-filled sandstone with moderate to good reservoir quality. The petroleum/water contact was encountered in the Eiriksson Formation, but not in the Cook Formation.

Well 30/6-C-2 A was drilled to a vertical depth of 2795 metres below sea level and was terminated in the Eiriksson Formation.

The well was drilled from the Oseberg C installation and has been plugged back.

The well was not formation-tested, but data collection has been carried out.

Water depth at the site is 109 metres.

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