Method of treating a well with viscoelastic surfactant and viscosification activator

摘要

A well treatment fluid contains a viscoelastic surfactant and a viscosification activator. The viscosification activator enhances the viscosity of the well treatment fluid in contrast to a treatment fluid that does not contain a viscosification activator.

主权项

1. A method of fracturing a subterranean formation comprising introducing into the subterranean formation a fracturing fluid comprising a proppant suspended in a well treatment fluid, wherein the well treatment fluid comprises water or brine, a viscoelastic surfactant comprising a mixture of an anionic surfactant and a cationic surfactant and a viscosification activator, wherein the volumetric ratio of anionic surfactant to cationic surfactant is from about 1:4 to about 4:1 and further wherein the volumetric ratio of viscoelastic surfactant:viscosification activator is between from about 500:1 to about 1,000,000:1, the viscosity of the well treatment fluid being greater in the presence of the viscosification activator than in the absence of the viscosification activator.