Wells – Processes – Distinct – separate injection and producing wells
Patent
1977-12-22
1979-07-24
Guynn, Herbert B.
Wells
Processes
Distinct, separate injection and producing wells
166273, E21B 4322
Patent
active
041619820
ABSTRACT:
The conformance of an enhanced oil recovery process, including water flood, surfactant or other chemicalized water flood process, in a formation containing at least two zones of varying permeability, the permeability of one zone being at least 50 percent greater than the permeability of the other zone, is improved by flooding until the higher permeability zone has been depleted, after which a fluid is injected into the high permeability zone, said fluid having relatively low viscosity at the time of injection and containing a mixture of surfactants or surface active agents which promote the formation of a coarse emulsion in the flow channels of the formation which reduces the permeability of the high permeability zone. Since the viscosity of the fluid injected into the previously flooded, high permeability zone is no greater than water, it is injected easily into the zone and moves through substantially the same flow channels as water would move in the formation. After the permeability of the first zone has been reduced substantially, water flooding may then be accomplished in the second zone which was originally not invaded by the injected water since its permeability was substantially less than the permeability of the first zone.
REFERENCES:
patent: 3294164 (1966-12-01), Hardy et al.
patent: 3358758 (1967-12-01), Hardy et al.
patent: 3827497 (1974-08-01), Dycus et al.
patent: 3866680 (1975-02-01), Dauben
patent: 3977471 (1976-08-01), Gale et al.
patent: 4018278 (1977-04-01), Shupe
Kudchadker Mohan V.
Schievelbein Vernon H.
Varnon James E.
Whittington Lawrence E.
Guynn Herbert B.
Park Jack H.
Ries Carl G.
Texaco Inc.
Whaley Thomas H.
LandOfFree
High conformance enhanced oil recovery process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High conformance enhanced oil recovery process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High conformance enhanced oil recovery process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1285353