Patent ID: 9695353
Date: 2017-07-04
CPC Classifications: C09K,E21B

Claim:
1. A method for treating a hydrocarbon-bearing formation comprising: blending a carrier fluid with a polymer, a foaming agent and a gas constituent to form a foamed fracturing fluid, the foamed fracturing fluid having a viscosity of about 50 centipoise or greater at 100 s discharging the foamed fracturing fluid into a downhole fracture in the hydrocarbon-bearing formation; adding an oxidizing agent to the foamed fracturing fluid, the oxidizing agent and the polymer being selected such that upon activation of the labile group, the viscosity of the foamed fracturing fluid is reduced to about 10 centipoise or less at 100 s activating the labile group of the polymer with the oxidizing agent; and reducing the viscosity of the foamed fracturing fluid to about 10 centipoise or less at 100 s wherein the foamed fracturing fluid is operative to reduce friction during a hydrocarbon-bearing treatment operation and the synthetic polymer is devoid of guar.