Method for stimulating oil recovery from an underground...

Details Method for stimulating oil recovery from an underground... Method for stimulating oil recovery from an underground...

E - Fixed Constructions

21

B

166/31

E21B 43/28 (2006.01) E21B 43/16 (2006.01)

Patent

CA 1326437

A B S T R A C T METHOD FOR STIMULATING OIL RECOVERY FROM AN UNDERGROUND RESERVOIR Oil recovery from an underground reservoir is stimulated by injecting during a first stage of a fluid injection process a miscible flooding medium at a supercritical velocity through the reservoir until the flooding medium has travelled more than 90% of the distance from the injection well to a production well, whereupon the injection rate of the flooding medium is reduced to produce during a second stage of the process a displacement velocity in the reservoir less than the critical velocity at which fingering of the flooding medium through the displaced oil occurs.

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