“…For conventional gas reservoirs, elastic properties (e.g., density, P-wave impedance, Poisson's ratio) derived from seismic data can be effectively used to describe the spatial distribution of petrophysical properties (e.g., porosity, gas saturation and mineral content, etc.) based on rock-physics relationships between petrophysical properties and elastic properties (Gui et al, 2015;Grana et al, 2022). For shale gas reservoirs, there is also usually a certain relationship between TOC and elastic properties (Chopra et al, 2013;Zhao et al, 2016;Wilson et al, 2017).…”