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US 2025/0051634 A1Published application
Anti-syneresis agents for fracturing operations
AssigneeHalliburton Energy Services, Inc.
InventorsAntonio RECIO, Linping KE, William Cecil PEARL
Life of this patent
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Abstract
Fracturing fluids for treating subterranean formations. An example fracturing fluid includes 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. The fracturing fluid is introduced into a wellbore penetrating the subterranean formation at a pressure sufficient to fracture the subterranean formation and the subterranean formation is fractured with the fracturing fluid.
Claims22
A fracturing fluid for treating a subterranean formation, the fracturing fluid comprises:
- an anti-syneresis agent comprising a crosslinked copolymer comprising two crosslinkers,
- a water-soluble terpolymer,
- a terpolymer hydration aid selected from the group consisting of alkylphenol alkoxylate, alkyl polyglucosides, alkoxylated alkylamines, alkoxylated primary alcohols, alkoxylated branched alcohols, and any combination thereof,
- an antioxidizing agent 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,
- a metal crosslinking agent comprising a multivalent metal ion or metal complex selected from the groups IIA, IVB, VB, VIB, IIVB and/or VIIIB of the periodic table,
- a breaker 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, and
- an aqueous base fluid.
4 more elements
(canceled)
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 the groups IIA, IVB, VB, VIB, IIVB and/or VIIIB of the periodic table;
- 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.
5 more elements
(canceled)
A system for treating a subterranean formation using a fracturing fluid, the system comprises:
- a fracturing fluid comprising:
- an anti-syneresis agent comprising a crosslinked copolymer comprising two crosslinkers,
- a water-soluble terpolymer,
- a terpolymer hydration aid selected from the group consisting of alkylphenol alkoxylate, alkyl polyglucosides, alkoxylated alkylamines, alkoxylated primary alcohols, alkoxylated branched alcohols, and any combination thereof,
- an antioxidizing agent 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,
- a metal crosslinking agent comprising a multivalent metal ion or metal complex selected from the groups IIA, IVB, VB, VIB, IIVB and/or VIIIB of the periodic table,
- a breaker 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, and
- an aqueous base fluid;
- mixing equipment configured to mix the anti-syneresis agent, the water-soluble terpolymer, the terpolymer hydration aid, the antioxidizing agent, the metal crosslinking agent, the breaker, and the aqueous base fluid;
- and
- pumping equipment configured to pump the fracturing fluid in the wellbore.
8 more elements
Dependencies are inferred from the claim text.