Patent ID: 7543646

Claim:
A method for treating a subterranean formation with an aqueous viscoelastic treating fluid comprising introducing an aqueous treating fluid through a wellbore to the subterranean formation, where the aqueous treating fluid comprises: an aqueous base fluid; a viscoelastic surfactant (VES) gelling agent in an amount effective to increase the viscosity of the aqueous base fluid; and a fluid loss control agent slurry comprising: a non-aqueous fluid selected from the group consisting of alkylene glycols, glycerin and mixtures thereof, at least one fluid loss control agent selected from the group consisting of alkaline earth metal oxides, alkaline earth metal hydroxides, transition metal oxides, transition metal hydroxides, and mixtures thereof, and at least one oil selected from the group consisting of vegetable oil and fish oil, in an amount effective to improve suspension of the fluid loss control agent in the non-aqueous fluid.