Invention Grant
US07148185B2 Viscoelastic surfactant fluids stable at high brine concentration and methods of using same 有权
粘弹性表面活性剂流体在高盐水浓度下稳定,使用方法如下

Viscoelastic surfactant fluids stable at high brine concentration and methods of using same
Abstract:
A viscous aqueous high density well treatment fluid composition stable at high temperature containing a surfactant and inorganic salts is described. Methods of preparing the fluid and increasing the stability and viscosity of the fluid are given. The fluid is useful for wellbore cleanout, hydraulic fracturing, gravel packing, completion, acid diversion, lost circulation reduction, well killing, cementing, selective water shutoff, and fracture fluid diversion.
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