System stabilizers and performance enhancers for aqueous...

Details System stabilizers and performance enhancers for aqueous... System stabilizers and performance enhancers for aqueous...

2005-05-10

2008-03-18

Bates, Zakiya W. (Department: 3676)

Wells

Processes

Material placed in pores of formation to treat resident...

C166S278000, C166S283000, C166S300000, C166S307000, C166S308200

Reexamination Certificate

active

07343972

ABSTRACT:
An aqueous, viscoelastic fluid gelled with a viscoelastic surfactant (VES) is stabilized and improved with an effective amount of an alkali earth metal oxide and/or alkali earth metal hydroxide. These fluids are more stable and have reduced or no tendency to precipitate, particularly at elevated temperatures. The additives may also increase viscosity to the point where less VES is required to maintain a given viscosity. These stabilized, enhanced, aqueous viscoelastic fluids may be used as treatment fluids for subterranean hydrocarbon formations, such as in hydraulic fracturing.

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patent: 2002/0125012 (2002-09-01), Dawson et al.
patent: 2003/0188870 (2003-10-01), Hinkel et al.

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