Patent ID: 7723272

Claim:
A method for treating a subterranean formation comprising: providing a viscoelastic surfactant gelled treating fluid composition comprising: water; at least one viscoelastic surfactant (VES) in an amount effective to increase the viscosity of the water; at least one internal breaker selected from the group consisting of bacteria, saponified fatty acids, mineral oils, hydrogenated polyalphaolefin oils, saturated fatty acids, unsaturated fatty acids, and combinations thereof; at least one fluid loss control agent; and at least one viscosity enhancer selected from the group consisting of pyroelectric particles, piezoelectric particles, and mixtures thereof, where the viscosity enhancer has a particle size ranging between about 1 nanometer up to about 2 microns; introducing the treating fluid composition into the subterranean formation; treating the subterranean formation; and reducing the viscosity of the treating fluid composition with the internal breaker.