The East Brae Field, Blocks 16/03a, 16/03b, UK North Sea
The East Brae gas condensate field is the most northern of the four Upper Jurassic fields operated by Marathon Oil UK Limited in the UK North Sea. The field lies at the western margin of the South Viking Graben in UK Blocks 16/03a and 16/03b. The field was discovered in 1980 and commenced production in December 1993 from the East Brae platform. Recoverable reserves are estimated as 242 MMBBL of condensate and 1530 BSCF of sales gas.
The reservoir is composed predominantly of medium grained sandstones which were deposited by turbidity currents. The East Brae reservoir sequence is currently interpreted to be the basin floor lateral equivalent of the North Brae feeder system to the southwest. The structure is a faulted anticline developed during the latest Jurassic and early Cretaceous in response to regional compression. The reservoir is enclosed by the Kimmeridge Clay Formation, which also interdigitates with the coarser facies basinwards, and provides the source of the hydrocarbons.