Accelerated polymer gelation process for oil recovery...

Details Accelerated polymer gelation process for oil recovery... Accelerated polymer gelation process for oil recovery...

E - Fixed Constructions

21

B

166/1

E21B 33/138 (2006.01) C09K 8/512 (2006.01) C09K 8/88 (2006.01) C09K 8/90 (2006.01) E21B 43/26 (2006.01)

Patent

CA 1271127

ACCELERATED POLYMER GELATION PROCESS FOR OIL RECOVERY APPLICATIONS ABSTRACT A process for accelerating the gelation rate of a carboxylate- containing polymer used in oil recovery applications. A gel is prepared by mixing a single aqueous gelation solution at the surface made up of the polymer and a crosslinking agent containing a chromic carboxylate complex and a simple mineral acid. The concentration of the simple mineral acid is selected at a level which achieves the desired rate of gelation for a given application.

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