Miscible flooding with hydrocarbon gas is being applied on a pilot basis to the Statfjord Unit 1 reservoir of the Northern Fault Block of Shell/Esso's Brent field. This is expected to increase the recovery by 14 MMstb (2.2 Mm3) above the 39 MMstb (6.2 Mm3) expected from water flooding this unit.

Simulation studies were undertaken to confirm that the gas drive in the Unit 1 reservoir would be adequately separated from the concurrent water drive in the underlying units. Also critical production/injection rates for cusping have been investigated. The feasibility of this project will continue to be scrutinised.

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