The process of hydraulic fracturing of shale gas reservoir will consume large amounts of water.Duo to the high density and diffusivity of gas,supercritical CO_2 can replace water as fracturing fluid,showing a very good application prospects.Based on this,we proposed increasing the permeability of shale gas reservoir with supercritical CO_2 fracturing and independently developed experimental device.The device is mainly composed of the CO_2 booster system,triaxial loading and control system,oil bath temperatu...