Process for selectively reducing the fluid injection rate or pro

Details Process for selectively reducing the fluid injection rate or pro Process for selectively reducing the fluid injection rate or pro

1981-09-08

1984-02-28

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166292, E21B 33138, E21B 4322

Patent

active

044337299

ABSTRACT:
A process for improving areal conformance of fluids injected into or produced from a subterranean formation via a multiwell system wherein significantly greater amounts of fluid than desired are injected into or produced from at least one well of the multiwell system than from other wells of the system. An aqueous caustic solution, an aqueous solution containing a polyvalent cation dissolved therein, and a hydrocarbon spacer separating the aqueous solutions are injected into the hydrocarbon formation. The aqueous solutions are caused to mix in the near well bore environment of said at least one well thereby forming an insoluble precipitate which reduces the permeability of the near well bore environment over substantially the entire well bore interval.

REFERENCES:
patent: 2001350 (1935-05-01), Mills
patent: 2294078 (1942-08-01), Dow et al.
patent: 2747670 (1956-05-01), King et al.
patent: 2837163 (1958-06-01), Ramos et al.
patent: 3396790 (1968-08-01), Eaton
patent: 4140183 (1979-02-01), Holm
patent: 4304301 (1981-12-01), Sydansk

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