Comparison of shear-induced gas transmissivity of tensile fractures in sandstone and shale under varying effective normal stresses

Hydraulic transport properties of fractures not only control production flow rates in geo-energy reservoirs, but also affect potential leakage in waste/energy storage reservoirs. Here, we performed shear-seepage tests on tensile fractures in sandstone and shale samples under varying effective normal stress conditions. The experimental results show that hydraulic transmissivity of sandstone fractures decreases with imposed shear stress, which may...