Process for conformance control using a polymer flucculate

Details Process for conformance control using a polymer flucculate Process for conformance control using a polymer flucculate

E - Fixed Constructions

21

B

31/21

E21B 33/138 (2006.01) C09K 8/512 (2006.01)

Patent

CA 1217629

A PROCESS FOR CONFORMANCE CONTROL USING A POLYMER FLOCCULATE ABSTRACT An aqueous solution containing a water soluble polymer and a non- alkaline aqueous solution containing a polyvalent cation are sequen- tially injected into the relatively highly permeable zones of a sub- terranean formation. The solutions preferentially enter the relatively highly permeable zones and form a flocculate in situ when the polymer and cation contact and mix in the connate water. Sequential injection may be repeated several times until the permeability or the relatively highly permeable zones is substantially reduced thereby improving con- formance in the subterranean formation.

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