Pressure–dependent fracture permeability of marine shales in the Northeast Yunnan area, Southern China

A series of pressure–dependent permeability experiments were conducted on the Lower Silurian Longmaxi organic–rich shales in northeast Yunnan area, southern China, to investigate the effects of sedimentary bedding, fracture surface roughness, fracture offset, fracture aperture and effective pressure on shale permeability. The results demonstrate that the sedimentary bedding of shale only has a slight influence on matrix permeability, while the...