Distinguished by what from traditional conception of fissured shale gas, shale gas is concerned to the gas accumulated within the shales and/or mudstones by free and adsorbed gas.

• 与传统上的"泥页岩裂缝气"并不完全相同,页岩气是主体上以吸附相和游离相同时赋存于泥岩及页岩地层中的天然气。