ABSTRACT: Draugen Oil Field, Haltenbanken Province, Offshore Norway

Donald M. J. Provan

The Draugen oil field lies in Block 6407/9 in the Haltenbanken oil and gas province. The field is located 150 km off the coast of Norway and 200 km south of the Arctic Circle, in water depths of 240-280 m.

The field was discovered in 1984 by well 6407/9-1. Five more exploration/appraisal wells and two-dimensional seismic assisted in delineating the reservoir.

The field is hosted by a low-relief north-south-trending anticline measuring some 20 × 6 km. The reservoir lies at a depth of 1600 m subsea, and has an oil column of 40 m. The main reservoir is the Late Jurassic Rogn Formation sandstones, interpreted as a shallow-marine sand bar. The formation pinches out to the west and east, and is capped by Spekk Formation shales. A separate, smaller accumulation has also been proved in Middle Jurassic Garn Formation sandstones in the western part of the field. Sand quality in both reservoirs is good to excellent.

Field STOIIP is estimated at 180 million Sm³ of oil. Expectation of recoverable reserves is 67 million Sm³.

Government approval for field development was given in December 1988. The field will be developed with a concrete gravity base structure and offshore loading. The initial development plan calls for six oil producers and six subsea water injectors.

The platform will be installed in the summer of 1993, with first oil shortly thereafter. The planned plateau production rate is 14,300 Sm³/day dry oil.

Pending a gas offtake solution for the Haltenbanken region, produced associated gas will initially be reinjected into a water-bearing structure in the western part of the field.

AAPG Search and Discovery Article #91000©1990 AAPG Conference-Giant Oil and Gas Fields of the Decade 1978-1988 Conference, Stavanger, Norway, September 9-12, 1990