Oil recovery by enhanced imbitition in low permeability reservoi

Details Oil recovery by enhanced imbitition in low permeability reservoi Oil recovery by enhanced imbitition in low permeability reservoi

1993-12-09

1995-05-02

Suchfield, George A.

Wells

Processes

Specific pattern of plural wells

166263, 166270, 166271, 166272, 166303, 166308, E21B 4324, E21B 43267, E21B 4330

Patent

active

054110866

ABSTRACT:
A method for enhanced oil recovery from a low permeability diatomaceous reservoir by imbibition is described. In this method, oil is displaced from a single injection well, or series of injection wells into a single producer or series of producing wells by a combination of applied fluid pressure, plus "enhanced imbibition." Enhanced imbibition is accomplished by adding chemical additives to the injection fluid so that rock in the tight reservoir has a stronger affinity for the water present therein, thus releasing oil from the rock.

REFERENCES:
patent: 4167470 (1979-09-01), Karnofsky
patent: 4374023 (1983-02-01), Davis
patent: 4485871 (1984-12-01), Davis
patent: 4635720 (1987-01-01), Chew
patent: 4828031 (1989-05-01), Davis
patent: 4892147 (1990-01-01), Jennings, Jr. et al.
patent: 5085276 (1992-02-01), Rivas et al.
patent: 5305829 (1994-04-01), Kumar

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