Halliburton Company

John W Ely

John M Tinsley

A fracturing fluid composition consisting essentially of a viscous aqueous solution having a high concentration of cations, an anionic or nonionic viscosifier imparting a high viscosity to the composition, and an anionic, polymeric fluid loss material which is substantially insoluble in the aqueous solution, and is soluble in fresh water substantially free of the cations in the fracturing fluid. In the method of fracturing using the fracturing fluid compositions of the invention, the composition is injected into the fracture via the well bore to enlarge and/or extend the fracture. Completion of fracturing is followed by injection of fresh water into the fracture from the well bore to dissolve the anionic, polymeric fluid loss material, and displace the fracturing fluid composition into the formation upon continuation of a water flood operation.

Methods of water flooding and fracturing using clean, non-damaging

The present invention relates to methods and compositions for treating high temperature well formations whereby highly viscous crosslinked gels are formed in the formations.

High temperature well treating with crosslinked gelled solutions

A method of terminating the flow of formation fluids from an uncontrolled well comprising introducing a low viscosity fluid into the formation having the property of subsequently becoming highly viscous whereby the portion of the formation adjacent the uncontrolled well is surrounded by highly viscous fluid which blocks the flow of formation fluids to the uncontrolled well.

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Duncan, OK, United States of America

John W Ely