| 摘要 |
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 treating a subterranean zone comprising the steps of providing a well treating fluid that comprises a water component, a gas generating chemical, and an encapsulated activator, placing the well treating fluid in a subterranean zone, and allowing the gas generating chemical to react so that a gas is generated in the cement composition. Methods of cementing, fracturing, cementing compositions, fracturing fluid compositions, and foamed well fluid compositions also are provided.
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