Patent ID: 7875575

Claim:
A method for permanently inhibiting the flow of water and/or gas in a subterranean formation comprising: injecting into the subterranean formation wherein water and/or gas zones and flow channels are present, an aqueous viscoelastic treating fluid comprising: brine, at least one viscoelastic surfactant, and at least one viscosity enhancer selected from the group consisting of pyroelectric particles, piezoelectric particles, and mixtures thereof, and at least one stabilizer selected from the group consisting of alkali earth metal oxides, alkali earth metal hydroxides, alkali metal oxides, alkali metal hydroxides, Al 2 O 3 , ZnO, TiO 2 , MgO and mixtures thereof, and an absence of an internal breaker; and permitting the aqueous viscoelastic treating fluid to form a viscous plug in the subterranean formation and of a sufficient viscosity thereby permanently inhibiting the production of water and/or gas from the zones and flow channels while letting oil be produced.