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Book Chapter

The Gullfaks Field

By
Ole Petterson
Ole Petterson
Statoil Bergen, Norway
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Arvid Storli
Arvid Storli
Statoil Bergen, Norway
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Eva Ljosland
Eva Ljosland
Statoil Bergen, Norway
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Ole Nygaard
Ole Nygaard
Statoil Bergen, Norway
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Ian Massie
Ian Massie
Conoco
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Henrik Carlsen
Henrik Carlsen
Statoil Stavanger, Norway
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Published:
January 01, 1992

ABSTRACT

The Gullfaks giant oil field in the Norwegian sector of the North Sea was discovered in 1978. The Gullfaks field contains oil reserves on the order of 230 million standard m3.

Gullfaks represents the shallowest structural element of the Tampen spur. It was formed during the Upper Jurassic to Lower Cretaceous as a sloping high, with a westward structural dip gradually decreasing toward the east. The major north-south-striking faults, with eastward-sloping fault planes, divide the field into several rotated fault blocks. The central and eastern parts of the structure were eroded by the Early Cretaceous transgression.

The reservoir sands are the Middle Jurassic delta-deposited Brent Group, the Lower Jurassic shallow marine sandstones of the Cook Formation, and the Lower Jurassic fluvial channel and delta plain deposits of the Statfjord Formation.

The Brent reserves in the western part of the field are currently being developed from the Gullfaks A and Β platforms, and the eastern part is being developed from a third platform, Gullfaks C. Water injection is the major drive mechanism, maintaining the reservoir pressure above the bubble point.

One of the most important factors in the reservoir development of the Gullfaks field has been the effect of fault transmissibilities on lateral and vertical pressure distributions.

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Contents

AAPG Memoir

Giant Oil and Gas Fields of the Decade 1978-1988

Michel T. Halbouty
Michel T. Halbouty
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American Association of Petroleum Geologists
Volume
54
ISBN electronic:
9781629811086
Publication date:
January 01, 1992

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