Based on academic thought of non-aqueous fracturing proposed in recent years,the shale cylinder specimen of diameter 100 mm and length 200 mm was fractured by supercritical CO2 first,then it was used to conduct CO2 seepage experiment at different volume stress and temperature conditions,aiming at revealing the mechanism of permeability change in supercritical CO2 fractured shale and its influencing factors.The experimental results show that the permeability of fractured shale decreased due to the CO2 adsorption induced swelling.The permeability of fractured shale has a negative exponential relationship with effective stress.At the temperature range of 32-48 ℃,the permeability decreased with the increase of temperature,and the temperature sensitivity of permeability is also decreased with the increase of temperature.At the low pore pressure range(1-3 MPa),Klinkenberg effect exhibits a significant influence on the permeability,which leads to the permeability decreases with the increase of pore pressure,when the pore pressure exceeds 3 MPa,permeability increases with the increase of pore pressure as the effective stress is the dominant influencing factor.Therefore,the permeability of shale gas reservoir is commonly affected by the multiple factors such as geo-temperature,geo-stress and the pore structure of shale.Finally,the coupling relationship between shale permeability and geo-temperature,geo-stress field is established according to the experimental results. [ABSTRACT FROM AUTHOR]