Experimental investigation on fluid injection-induced fault reactivation

The data include the specimen geometry and CO₂ phase-transition path shown in Figure 1, the experimental setup information shown in Figure 2, and time-series measurements from injection-driven shear tests on saw-cut Beishan granite faults under CO₂ injection at confining pressures of 8, 20, and 30 MPa and N₂ injection at 30 MPa.

The raw experimental records include axial stress, confining pressure, injection pressure, downstream monitoring pressure, axial displacement, and temperature during the displacement-driven, stress-adjustment, and injection-driven stages. The processed data include calculated shear slip displacement, effective normal stress, shear stress, apparent friction coefficient, stress paths in effective-normal-stress–shear-stress space, and shear-stress/friction-coefficient evolution with slip displacement.