Patent ID: 8207094

Claim:
A method of treating a formation penetrated by a wellbore, the method comprising: providing a fluid composition comprising an aqueous medium, a foam extender, and a surfactant, and viscosifying agent; providing a gas component; and, injecting into the wellbore, the fluid concomitantly with the gas component; wherein the foam extender provides at least about an average 10% increase in measured viscosity values over at least a 10 minute period as measured over about a 180 minute evaluation interval, and wherein the foam extender is selected from the group consisting of trisodium phosphate, disodium hydrogen phosphate, sodium pyrophosphate, potassium pyrophosphate, ammonium pyrophosphate, sodium meta phosphate, potassium meta phosphate, ammonium meta phosphate, pyrodisodium phosphate, tripotassium phosphate, dipotassium hydrogen phosphate, diammonium hydrogen phosphate and trilithium phosphate.