Crosslinked polyvinyl amine copolymer gels for use under harsh r

Details Crosslinked polyvinyl amine copolymer gels for use under harsh r Crosslinked polyvinyl amine copolymer gels for use under harsh r

1989-10-16

1990-10-23

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166272, 166274, 166295, 523130, E21B 33138, E21B 4322, E21B 4324

Patent

active

049644637

ABSTRACT:
A gel-forming composition capable of plugging highly permeable zones in a subterranean formation. The composition comprises water, a viscosifying amount of a water-dispersible polyvinyl amine copolymer and a crosslinking agent which is a mixture of an aldehyde and a phenolic component in an amount effective to cause gelation of the aqueous solution of the copolymer. The resultant gel is exceptionally thermally stable and, therefore, can be used as an effective profile control agent in all enhanced oil recovery operations, including steam flooding.

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