Patent ID: 8590622

Claim:
A method comprising: providing an acidic treatment fluid that comprises: an acidic aqueous base fluid, a synthetic cationic gelling agent, wherein the synthetic cationic gelling agent comprises at least one gelling agent selected from the group consisting of: a acrylamide/2-(methacryloyloxy)ethyltrimethylammonium methyl sulfate copolymer, a acrylamide/2-(methacryloyloxy)ethyltrimethylammonium chloride copolymer, any derivative thereof, and any combination thereof, one or more salts of one or more organic acids, and one or more organic acids; and contacting a subterranean formation with the acidic treatment fluid at or above a pressure sufficient to create or enhance one or more fractures in a portion of the subterranean formation, wherein the viscosity of the treatment fluid in the subterranean formation is greater than about 20 cP for at least 20 minutes at temperatures higher than about 275° F.