Performance of a High-Molecular-Weight AM/AA Copolymer in a CO₂-Water Polymer Hybrid Fracturing Fluid Under High-Temperature and High-Pressure Conditions.

ABSTRACT: To reduce water consumption and potential formation damage associated with conventional water-based fracturing fluids while improving the proppant-carrying and flow adaptability of CO₂-based systems without relying on specialized CO₂ thickeners, a CO₂-water polymer hybrid fracturing fluid was developed using an AM/AA copolymer (poly(acrylamide-co-acrylic acid), P(AM-co-AA)) as the thickening agent for the aqueous phase. Systematic experimental investigations were conducted under high-temperature and high-pressure conditions. Fluid-loss tests at different CO₂ volume fractions show that the CO₂-water polymer hybrid fracturing fluid system achieves a favorable balance between low fluid loss and structural continuity within the range of 30

SUBMITTER: Chen T 

PROVIDER: S-EPMC12899513 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature