Fluid system having controllable reversible viscosity

Details Fluid system having controllable reversible viscosity Fluid system having controllable reversible viscosity

2007-10-30

2007-10-30

Buttner, David J. (Department: 1712)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S240000, C507S266000, C507S267000, C507S277000, C166S305100

Reexamination Certificate

active

11465467

ABSTRACT:
This Invention relates to methods of treating a subterranean hydrocarbons reservoir comprising contacting the formation with a treating fluid comprising an aqueous solution, an acid, a surfactant acting as gelling agent essentially consisting of erucylamidopropyl betaine (or a protonated/deprotonated homolog or salt thereof). The treating fluid may further comprise a lower n-alcohol for improved temperature stability.

REFERENCES:
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patent: 6569814 (2003-05-01), Brady et al.
patent: 6667280 (2003-12-01), Chang et al.
patent: 6903054 (2005-06-01), Fu et al.
patent: 6929070 (2005-08-01), Fu et al.
patent: 7119050 (2006-10-01), Chang et al.
patent: 2002/0033260 (2002-03-01), Lungwitz et al.

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