Methods for acidizing subterranean formations and gelled...

Details Methods for acidizing subterranean formations and gelled... Methods for acidizing subterranean formations and gelled...

E - Fixed Constructions

21

B

31/21

E21B 43/27 (2006.01)

Patent

CA 1228471

ABSTRACT OF THE DISCLOSURE Gellable and gelled acid compositions comprise an aqueous acid, and a water-soluble polymer comprising, for example, acrylamide and methacryloylethyl trimethyl ammonium chloride. Optionally, the composition includes a reducing agent such as erythorbic acid. The gelled acids are useful in acidizing subterranean formations and such gels are stable to degradation by heat and do not yield insoluble residues when used in the presence of ferric ions.

461615

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