Halliburton Company

David J Hanlon

Stephen W Almond

Marlin D Holtmyer

Charles V Hunt

Mike Conway

Jimmie Dean Weaver, Jr

J Michael Wilson

The present invention provides vicinal diol containing monomers and polymers and methods of preparing and using such monomers and polymers. When crosslinked in aqueous fluids, the polymers form high viscosity gels which are stable at high temperatures.

Vicinal diol containing monomers and polymers and methods of treating a

The present invention provides a water soluble vinyl monomer containing a vicinal diol group of the general formula: ##STR1## wherein R.sub.1 is hydrogen or methyl; R.sub.3 and R.sub.4 are independently methyl or ethyl; Y is oxygen or NH; X.sup.- is a halogen, sulfate, CH.sub.3 SO.sub.4.sup.- or C.sub.2 H.sub.3 SO.sub.4.sup.- or CH.sub.3 COO.sup.- and n is 2 or 3. Polymers containing the monomer when crosslinked in aqueous fluids form high viscosity gels which are stable at high temperatures and can be used in carrying out completion, stimulation, enhanced production and other treatments in subterranean formations.

Vicinal diol containing monomers and methods of preparing

A crosslinking composition and method for reducing the permeability of a subterranean formation. The crosslinking composition comprises aluminum cations having a valence of 3.sup.+ and zirconium cations having a valence of 4.sup.+.

Composition for and method of altering the permeability of a

A composition for and method of removing polymeric material from a porous media such as a subterranean formation. The method comprises contacting the polymeric material with an aqueous composition having a pH of from about 2 to about 10 and comprising an oxidizing agent, a water soluble carboxylic acid, and optionally, a source which is effective in promoting the decomposition of the oxidizing agent.

Method of improving the permeability of a subterranean formation by

The production of water from a subterranean formation is reduced by contacting the formation with a water dispersible hydrophilic organic polymer having a molecular weight greater than 100,000 and containing carboxyl functionality and a crosslinking composition comprising water, a zirconium compound having a value of 4+, an alpha-hydroxy acid and an amine compound.

Method of altering the permeability of a subterranean formation

A crosslinking composition and method of preparing the crosslinking composition. The crosslinking composition comprises a zirconium compound having a valence of +4, an alpha-hydroxy acid, and an amine compound.

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Duncan, OK, United States of America

David J Hanlon