Injection-induced fracturing process in a tight sandstone under different saturation conditions

To investigate the influence of local hydraulic condition on the water injection-induced fracture behavior in tight sandstone, injection tests under triaxial compression were conducted on samples collected from the Sichuan Basin, China. By means of acoustic emission (AE) monitoring, the fracturing behaviors of two samples of different water saturation patterns, partly saturated (the middle part was dry) and fully saturated, are investigated....