Methods of generating gas in well treating fluids
First Claim
1. A method of making a foamed well fluid that comprises a gas comprising the steps of:
- combining an aqueous fluid, a surfactant, a delayed encapsulated activator, a proppant material, and a gas generating chemical, the gas generating chemical being present in an amount in the range of from about 0.1% to 100% of a water component in the aqueous fluid; and
allowing the gas generating chemical and the delayed encapsulated activator to react so that gas is generated in the aqueous fluid to form a foamed well fluid.
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Abstract
The present invention relates to methods of generating gas in and foaming well treating fluids during pumping of the treating fluids or after the treating fluids are placed in a subterranean zone, or both. A method of the present invention provides a method of making a foamed well fluid that comprises a gas comprising the steps of combining an aqueous fluid, a surfactant, an encapsulated activator, and a gas generating chemical, the gas generating chemical being present in an amount in the range of from about 0.1% to 100% of a water component in the aqueous well fluid; and allowing the gas generating chemical and the encapsulated activator to react so that gas is generated in the aqueous fluid to form a foamed well fluid. Methods of cementing, fracturing, cementing compositions, fracturing fluid compositions, and foamed well fluid compositions also are provided.
125 Citations
28 Claims
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1. A method of making a foamed well fluid that comprises a gas comprising the steps of:
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combining an aqueous fluid, a surfactant, a delayed encapsulated activator, a proppant material, and a gas generating chemical, the gas generating chemical being present in an amount in the range of from about 0.1% to 100% of a water component in the aqueous fluid; and allowing the gas generating chemical and the delayed encapsulated activator to react so that gas is generated in the aqueous fluid to form a foamed well fluid. - View Dependent Claims (2, 3, 4, 5)
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- 6. A well treatment fluid that comprises a water component, a gelling agent, a proppant material, a gas generating chemical, and a delayed encapsulated activator.
- 21. A foamed well fluid comprising a proppant material and a gas, the gas being generated by a reaction of a gas generating chemical and a delayed encapsulated activator.
Specification