Foamed viscoelastic surfactants

Details Foamed viscoelastic surfactants Foamed viscoelastic surfactants

2008-03-18

2008-03-18

Gulakowski, Randy (Department: 1796)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S260000, C507S261000, C507S264000, C507S266000, C507S267000, C166S270100, C166S308600, C166S309000

Reexamination Certificate

active

07345012

ABSTRACT:
A method for increasing the foam stability of foams made with cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of an amphiphilic polymeric foam stabilizer containing at least one portion that is a partially hydrolyzed polyvinyl ester or partially hydrolyzed polyacrylate. The foam stabilizer allows foams to be used at temperatures at which the unfoamed fluids would not have stable viscosity, and allows use of lower viscoelastic surfactant concentrations in the liquid phase. Preferred surfactants are betaines and quaternary amines. The fluids are useful in oilfield treatments, for example fracturing and gravel packing.

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SPE 56529—Case study of a novel acid-diversion technique in carbonate reservoirs—F. F. Chang, T. Love, C.J. Affeld, J.B. Blevins III, R.L. Thomas and D.K. Fu.
SPE 80274—Application of Novel Diversion Acidizing Techniques to Improve Gas Production in Heterogeneous Formation. By Xugang Wang, Honglan Zou, Jun Tian, Fuxiang Zhang, Xingsheng Cheng and Suzhen Li.

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