Hydraulic Fracturing Behavior in Shale with Water and Supercritical CO₂ under Triaxial Compression

Comparing to the water fracturing fluid regularly used in the hydraulic fracturing operation, supercritical CO 2 (SC-CO 2 ) as a promising nonaqueous fracturing fluid has the great potential for the improvement of production and protection of shale reservoir. This paper presents an experimental study of the mechanical response and fracture propagation of shale fractured using water and SC-CO 2 under the different stress status and injection...