Well stimulation compositions
AssigneeBJ Services Company
InventorsMarek K Pakulski, Jeffrey C. Dawson
Life of this patent
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Abstract
A well service fluid composition comprises a fracturing fluid and a gas hydrate inhibitor. Preferably, the gas hydrate inhibitor does not affect the function of the fracturing fluid and is present in an amount sufficient to control and/or minimize the formation of gas hydrates. The well service fluid composition is useful in hydraulic fracturing in which the composition is injected into a subterranean formation under sufficient pressure to initiate and propagate a fracture in the formation. The fracturing fluid may be subsequently recovered when the fracturing operation is completed.
Claims16
A well stimulation composition comprising
- a fracturing fluid comprising an aqueous fluid, a guar polymer or a derivative thereof, a cross-linking agent capable of increasing the viscosity of the fracturing fluid by cross-linking the polymer in the aqueous fluid, and a breaking agent;
- and
- a gas hydrate controller selected from the group consisting of homopolymers or copolymers of N,N-dialkylamineoethylmethacrylates, homopolymers or copolymers of N-vinyl-N-alkyl amides, homopolymers or copolymers of N-vinyl lactams, homopolymers or copolymers of N-methyl-N-vinylacetamide/lactams, homopolymers or copolymers of N-acyl substituted polyalkeneimines, and mixtures thereof,
- wherein the gas hydrate controller is present in the composition in an amount effective to control the formation of gas hydrates.
A method of fracturing a subterranean formation comprising:
- obtaining a well service composition comprising a fracturing fluid comprising an aqueous fluid, a guar polymer or a derivative thereof, and a cross-linking agent capable of increasing the viscosity of the fracturing fluid by cross-linking the polymer in the aqueous fluid;
- and a gas hydrate controller selected from the group consisting of homopolymers or copolymers of N,N-dialkylamineoethylmethacrylates, homopolymers or copolymers of N-vinyl-N-alkyl amides, homopolymers or copolymers of N-vinyl lactams, homopolymers or copolymers of N-methyl-N-vinylacetamide/lactams, homopolymers or copolymers of N-acyl substituted polyalkeneimines, and mixtures thereof, said gas hydrate controller being present in said composition in an amount effective to control the formation of gas hydrates;
- and
- injecting the well service composition into a borehole to contact at least a portion of the formation by the fracturing fluid under a sufficient pressure to fracture the formation.
Dependencies are inferred from the claim text.