| CPC C09K 8/685 (2013.01) [C09K 8/80 (2013.01); E21B 43/26 (2013.01)] | 20 Claims |
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11. A method for treating a subterranean formation using a fracturing fluid, the method comprises:
preparing a fracturing fluid by combining an anti-syneresis agent, a water-soluble terpolymer, a terpolymer hydration aid, an antioxidizing agent, a metal crosslinking agent, a breaker, and an aqueous base fluid;
wherein the anti-syneresis agent comprises a crosslinked copolymer comprising two crosslinkers;
wherein the terpolymer hydration aid is selected from the group consisting of alkylphenol alkoxylate, alkyl polyglucosides, alkoxylated alkylamines, alkoxylated primary alcohols, alkoxylated branched alcohols, and any combination thereof;
wherein the antioxidizing agent is selected from the group consisting of sodium thiosulfate, ascorbic acid, phenothiazine, alkyl-substituted phenothiazine, aryl-substituted phenothiazine, aroyl-substituted phenothiazine, carboxyl-substituted phenothiazine, halogen-substituted phenothiazine, N-(dialkylaminoalkyl)-substituted phenothiazine, phenothiazine-5-oxide, alkyl-substituted phenothiazine-5-oxide, aryl-substituted phenothiazine-5-oxide, aroyl-substituted phenothiazine-5-oxide, carboxyl-substituted phenothiazine-5-oxide, halogen-substituted phenothiazine-5-oxide, N-(dialkylaminoalkyl)-substituted phenothiazine-5-oxide, 3-phenylphenothiazine, N-phenylphenothiazine, 10,10′-diphenyl-phenothiazine, N-benzoylphenothiazine, 7-benzoylphenothiazine, 3,7-difluorophenothiazine, N-ethylphenothiazine, 2-acetyl-phenothiazine, 3,7-dioctylphenothiazine, N-methylphenothiazine-5-oxide, N-acetylphenothiazine, N-(2-diethylaminoethyl)-phenothiazine, N-(2-dimethylaminopropyl)-phenothiazine, N-octadecylphenothiazine, N-propylphenothiazine, any hydrochlorides thereof, and any combination thereof;
wherein the metal crosslinking agent comprises a multivalent metal ion or metal complex selected from zirconium, aluminum, titanium, boron, chromium, iron, water-soluble salts of the multivalent metal ions, halides, complexes of the multivalent metal ions with organic N- and O-compounds, alcohols, mono-, di- and tri-carboxylic acids, mono-, di- and triamines, hydroxyalkylamines, or any combination of multivalent metal ion and/or metal complex,
wherein the breaker is selected from the group consisting of a persulfate, perborate, percarbonate, peroxide, bromate, chlorite, N- and O-acyl compound, dialkyperoxide, diacylperoxide, peroxydicarbonate, alkylhydroperoxide, ester of peracid, and any combination thereof;
introducing the fracturing fluid into a wellbore penetrating the subterranean formation at a pressure sufficient to fracture the subterranean formation, and
fracturing the subterranean formation with the fracturing fluid.
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