Frigg gas field

Frigg gas field

North Sea Oil and Gas Fields

Location of Frigg gas field

Country Norway
Region North Sea
Location/block 25/1
Offshore/onshore Offshore
Coordinates 59°52′48.48″N 2°3′59.40″E / 59.8801333°N 2.0665000°E / 59.8801333; 2.0665000Coordinates: 59°52′48.48″N 2°3′59.40″E / 59.8801333°N 2.0665000°E / 59.8801333; 2.0665000
Operator Total S.A.
Field history
Discovery 1971
Start of production 8 May 1978
Abandonment 26 October 2004
Production
Estimated gas in place 6,780×10^9 cu ft (192×10^9 m3)

Frigg gas field is a natural gas field on Norwegian block 25/1[1] in the North Sea, on the boundary between the United Kingdom and Norway. The field is named after the goddess Frigg. King Olav V of Norway officially opened production on 8 May 1978. Production was closed on 26 October 2004. The field is situated 230 kilometres (140 mi) northwest of Stavanger. Operator for the field was the French oil company Elf Aquitaine, which merged and changed name to Total S.A.

Operations were regulated according to an agreement between the UK and Norwegian governments called the Frigg Treaty.

Infrastructural changes were made in three phases:

Geology

The field was discovered at a depth of 1,850 metres (6,070 ft) by the Petronord group (Elf Aquitaine, Total Oil Marine Norsk, and Norsk Hydro) and the Norwegian State in 1971 with Well 25/1-1 using the Semi-submersible Neptune P 81 in 100 m of water.[2] The well was located following interpretation of a 15 by 20 km grid of Reflection seismology lines recorded in 1965.[3] A 5 by 5 km finer grid of seismic lines were recorded in 1969, followed by a 1 by 1 km grid in 1973, combined with four appraisal wells determined the field was 115 km2 in area with a 170 m gas column in Lower Eocene sandstones forming an abyssal fan in the Viking Structural basin.[4] The fan structure appears on seismic sections as a low relief Anticline that includes a Flat spot caused by the Density contrast of the gas.[5]

Pipelines connected to the Frigg field

Images

References

  1. ↑ Heritier, F.E., Lossel, P., and Wathne, E., 1980, Frigg Field-Large Submarine-Fan Trap in Lower Eocene Rocks of the Viking Graben, North Sea, in Giant Oil and Gas Fields of the Decade:1968-1978, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 59
  2. ↑ Heritier, F.E., Lossel, P., and Wathne, E., 1980, Frigg Field-Large Submarine-Fan Trap in Lower Eocene Rocks of the Viking Graben, North Sea, in Giant Oil and Gas Fields of the Decade:1968-1978, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 60
  3. ↑ Heritier, F.E., Lossel, P., and Wathne, E., 1980, Frigg Field-Large Submarine-Fan Trap in Lower Eocene Rocks of the Viking Graben, North Sea, in Giant Oil and Gas Fields of the Decade:1968-1978, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 60
  4. ↑ Heritier, F.E., Lossel, P., and Wathne, E., 1980, Frigg Field-Large Submarine-Fan Trap in Lower Eocene Rocks of the Viking Graben, North Sea, in Giant Oil and Gas Fields of the Decade:1968-1978, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 60
  5. ↑ Heritier, F.E., Lossel, P., and Wathne, E., 1980, Frigg Field-Large Submarine-Fan Trap in Lower Eocene Rocks of the Viking Graben, North Sea, in Giant Oil and Gas Fields of the Decade:1968-1978, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 65

External links

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