Viscoelastic surfactant fluids and associated acidizing methods

Details Viscoelastic surfactant fluids and associated acidizing methods Viscoelastic surfactant fluids and associated acidizing methods

2007-01-09

2007-01-09

Bates, Zakiya W. (Department: 3676)

Wells

Processes

Placing fluid into the formation

C166S282000, C507S259000

Reexamination Certificate

active

11058475

ABSTRACT:
Provided are treatment fluids that comprise an aqueous base fluid, an acid, and a methyl ester sulfonate surfactant, and associated methods of use. In one embodiment, the present invention provides a method of acidizing a subterranean formation comprising: providing a treatment fluid comprising an aqueous base fluid, an acid, and a methyl ester sulfonate surfactant; introducing the treatment fluid into a well bore that penetrates the subterranean formation; and allowing at least a portion of the treatment fluid to react with at least a portion of the subterranean formation so that at least one void is formed in the subterranean formation. In some instances, the treatment fluids exhibit viscoelastic behavior which may be due, at least in part, to the association of at least a portion of the methyl ester sulfonate surfactant into a plurality of micellar structures.

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