Process for fracturing well formations using aqueous gels

Details Process for fracturing well formations using aqueous gels Process for fracturing well formations using aqueous gels

E - Fixed Constructions

21

B

31/23

E21B 43/26 (2006.01) C09K 8/68 (2006.01)

Patent

CA 1098690

A method and composition for fracturing a subterranean formation which comprises (1) contacting a subterranean formation with an aqueous liquid comprising a propping agent and a composition containing water, acrylamide:methacrylate copolymer cross-linked with chromium (III) ion, in presence of carbonate ion, oxalate ion, and persulfate ion, (2) applying pressure to said liquid, (3) maintaining said pressure to fracture said formation, (4) and said gel breaking within 24 hours of gel formation.

301971

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