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Geological Society, London, Memoirs; 2003; v. 20; p. 315-325;
DOI: 10.1144/GSL.MEM.2003.020.01.27
© 2003 Geological Society of London

Part 4: Viking Graben Fields

The North Cormorant Field, Block 211/21a, UK North Sea

Louise Bater

Shell UK Exploration and Production, 1 Altens Farm Road, Aberdeen AB12 3FY, UK

The Cormorant Field was discovered by exploration well 211/26-1 in 1972; the fifth field to be discovered in the Northern North Sea. It straddles blocks 211/21 a and 211/26a and is made up of four discrete accumulations spread along a major N-S trending fault terrace. Oil is produced from the sandstones belonging to the Brent Group. The sedimentary rocks comprising the Brent Group were deposited in a fluvial-wave dominated delta system during the Middle Jurassic. The field is developed from two fixed platforms and an underwater manifold centre and the oil is exported through the Brent system to Sullom Voe in the Shetland Islands. For development purposes the field is split in half; north and south, and it is the northern part, developed by the North Cormorant platform, that is the subject of this review.