Analysis of Factors Controlling Shale Gas Enrichment

In this chapter, the definition of shale gas is reinterpreted and proposed: Shale gas is the “residual gas” in source rock that has not been discharged in time. Shale gas exists in the form of adsorbed gas, free gas or dissolved gas, which is mainly biogenic gas, thermal gas or a mixture of these two. Lithofacies paleogeography, as a comprehensive reflection of facies and paleosedimentary environment, is the main controlling and basic factors affecting the development of organic-rich shale, and should be the basis of shale gas geological survey, and the related mapping technology should be the key technology in the geological survey process.