Cyclic flooding of a naturally-fractured formation

Details Cyclic flooding of a naturally-fractured formation Cyclic flooding of a naturally-fractured formation

E - Fixed Constructions

21

B

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E21B 43/22 (2006.01) C09K 8/588 (2006.01) E21B 43/16 (2006.01) E21B 47/00 (2006.01)

Patent

CA 1265437

ABSTRACT CYCLIC FLOODING OF A NATURALLY-FRACTURED FORMATION Two fluids having different mobilities are sequentially injected in repeating cycles into a naturally-fractured subterranean oil-bearing formation to facilitate oil recovery therefrom. The first fluid is a mobility adjusted fluid containing a mobility control agent which im- parts reduced mobility to the fluid. The mobility adjusted fluid dis- places oil from the formation fractures to a production well. The second fluid has a higher mobility than the first fluid which enables it to displace oil from the formation matrix to the formation fractures. The cycle is repeated to produce the newly displaced oil in the frac- tures.

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