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Geological Society, London, Special Publications; 1992; v. 61; p. 3-14;
DOI: 10.1144/GSL.SP.1992.061.01.02
© 1992 Geological Society of London

Exploration of the Brent Province

J. M. Bowen

Enterprise Oil Plc, Grand Buildings, Trafalgar Square, London WC2N 5EJ, UK

The Brent Province is situated in the central part of the northern North Sea between 60°30' and 62° North. A few licences were issued in 1965 (Round 2) and again in 1969 (Round 3). Seismic exploration from the mid-1960s onwards showed a thick Tertiary/Cretaceous sequence draped unconformably over tilted fault blocks of unknown age. In 1971, coincident with the opening of the 4th Round, Shell’s 211/29–1 pioneered drilling in the area with a major oil discovery, the Brent Field in Middle Jurassic deltaic sandstones. The 4th Round resulted in allocation of almost all the remaining blocks. Between 1972 and 1978, 32 discoveries were made in the UK sector of which 17 are currently in production and a further 7 in the pre-development stage; thereafter only minor reserves have been added, the area now being relatively mature. The exploration history in Norway has been similar although delayed by a few years; it is also less mature as several blocks have still to be explored. Total reserves for the province now approximate to 15 billion barrels of oil equivalent.





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