Most of the tight sandstone and carbonate rock gas reservoirs are mainly low-porosity and low-permeability reservoirs with a variety of complex porous genesis and types. The porosity and permeability have an important infl uence on the seismic elastic modulus and velocity, making gas detection very diffi cult. To focus on the low porosity and low permeability complex pore media, the integrated evaluation of porous structure and seismic rock physical analysis can be used to evaluate how the complexity of por...