Schlumberger Technology Corporation

Rhodia Chimie

Rhodia Limited

Robert J Tillotson

Yiyan Chen

Manilal S Dahanayake

Jesse Lee

Herve Adam

Hui Shirley Yang

Allwyn Colaco

Mathieu Joanicot

Fang Li

Jean-Luc Joye

Jon D Kiplinger

Caroline Heitz

The invention relates to the use, in emulsion polymerization, of at least a compound derived from a terpene and comprising a number of oxypropylene units ranging between 0 to 20, and a number of oxyethylene units ranging between 2 to 80.

Use of polyoxypropylene and polyoxyethylene terpene compounds in emulsion polymerization

A method for increasing the rate of shear rehealing of fluids made with cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a rheology enhancer package containing, for example a polyethylene glycol-polypropylene glycol block copolymer and a polynaphthalene sulfonate. The rheology enhancer package allows viscoelastic surfactant fluids to be used at lower viscoelastic surfactant concentrations in certain applications, for example certain oilfield treatments, for example fracturing and gravel packing. Preferred surfactants are betaines and quaternary amines.

Rheology enhancers

The invention relates to a hydraulic fracturing fluid comprising an aqueous liquid, and a block copolymer containing at least one water-soluble block and one hydrophobic block and being particularly suited for use in high temperature ranges, greater than 180&deg; C.

Hydraulic fracturing fluid comprising a block copolymer containing at least one water-soluble block and one hydrophobic block

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Toms River, NJ, United States of America

Robert J Tillotson