Altering subterranean formation permeability

Details Altering subterranean formation permeability Altering subterranean formation permeability

1989-02-16

1990-04-17

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166270, 166273, 166300, E21B 33138, E21B 4322

Patent

active

049171860

ABSTRACT:
Methods and compositions for altering the water permeability of subterranean formations are provided. The compositions are comprised of water, at least one polymer capable of being gelled when contacted with a crosslinking agent, at least one crosslinking agent comprised of polyvalent metal cation, and a cation reactivity retarding chelating agent which provides anion for chelating the polyvalent metal cation selected from substantially water soluble dicarboxylic acids, hydroxy carboxylic acids, ketocarboxylic acids and the corresponding salts thereof.

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patent: 4579667 (1986-04-01), Echt et al.
patent: 4683949 (1987-08-01), Sydansk et al.
patent: 4799548 (1989-01-01), Mumallah et al.

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