Matrix gas flow through “impermeable” rocks – shales and tight sandstone

Abstract. The effective pressure sensitivity of gas flow through two shales (Bowland and Haynesville shales) a tight sandstone (Pennant sandstone) was measured over the typical range reservoir conditions. These are low-permeability rocks such as can be exploited cap above reservoirs that might developed to store compressed air, methane, or hydrogen bury waste carbon dioxide, all which may become important components forthcoming major changes in methods energy generation storage. Knowledge petrophysical properties will great importance developments. All three display only small log10 permeability at low pressures, but these decrease dramatically different rates with increasing pressure, rate itself decreases stiffen. bulk moduli each also used formulate description terms progressive closure narrow, crack-like pores pressure. In case particular, very proportion total porosity takes part gases, particularly along bedding layering.