High-temperature foam fracturing fluid with synthetic polymer

Abstract

The present disclosure provides a two-phase liquid-gas fluid for hydraulic fracturing, including a liquid phase including a foaming surfactant and a branched synthetic polymer, wherein the polymer includes monomers selected from the group consisting of acrylamide, acrylic acid, methacrylic acid, 2-acrylamido-2-methylpropane sulfonic acid, and combinations thereof, and a gas phase comprising CO2, wherein the fluid maintains a viscosity of at least 70 cp after exposure to temperatures of 200° F. to 300° F. for at least 90 minutes. The foam fluid demonstrates thermal stability at high temperatures and maintains stable viscosity under high temperature and pressure conditions, making the fluid suitable for hydraulic fracturing applications in high-temperature reservoirs.

Dependencies are inferred from the claim text.