Oil recovery process using a delayed polymer gel

Details Oil recovery process using a delayed polymer gel Oil recovery process using a delayed polymer gel

E - Fixed Constructions

21

B

166/32

E21B 33/138 (2006.01) C09K 8/512 (2006.01) E02D 3/12 (2006.01)

Patent

CA 1265436

OIL RECOVERY PROCESS USING A DELAYED POLYMER GEL Abstract A process for reducing the permeability of a high permeability region in a subterranean hydrocarbon-bearing formation by preparing an aqueous gelation solution at the surface comprised of a water-soluble polymer, a metal carboxylate crosslinking agent and a carboxylic acid delaying agent. The delaying agent substantially delays gelation of the solution until it is injected and in place in the desired treatment region.

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