Plugging high permeability zones of reservoirs having heterogene

Details Plugging high permeability zones of reservoirs having heterogene Plugging high permeability zones of reservoirs having heterogene

1977-02-11

1978-01-24

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166294, E21B 33138, E21B 4322

Patent

active

040698696

ABSTRACT:
A method of forming a mixed plug in the more permeable zones of a subterranean reservoir of nonuniform permeability in which there is injected into the reservoir aqueous solutions of: a polymer, a material that reacts with the polymer to form a time-delayed polymer-containing plug, an alkali metal silicate and a material that reacts with the silicate to form a time-delayed silicate-containing plug. The injected solutions are either admixed at the surface prior to injection or are simultaneously injected so that a mixed polymer-silicate plug is formed in the reservoir.

REFERENCES:
patent: 3386509 (1968-06-01), Froning
patent: 3396790 (1968-08-01), Eaton
patent: 3656550 (1972-04-01), Wagner, Jr. et al.
patent: 3741307 (1973-06-01), Sandiford et al.
patent: 3749172 (1973-07-01), Hessert et al.
patent: 3908760 (1975-09-01), Clampitt et al.
patent: 3926258 (1975-12-01), Hessert et al.
patent: 3981363 (1976-09-01), Gall
patent: 4004639 (1977-01-01), Sandiford
patent: 4009755 (1977-03-01), Sandiford
patent: 4031958 (1977-06-01), Sandiford et al.

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