Abstract: The intercratonic coal-bearing basins are characterized by slow sedimentary ratio,broadly distributed coal beds,gradual evolution mode of temperature and pressure,as well as weak structural deformation.Taking the Upper Paleozoic of Ordos Basin as an example,the forming process of coal-formed gas reservoir was simulated by PetroMod software.The results show that the lithologic gas reservoirs are dominant in the intercratonic coal-bearing basins.The source kitchen of the coal-formed gas is distributed broadly.The migration pathway of natural gas is short,and there is mainly the vertical migration,while the horizon migration is minority.Superimposed sand bodies and fracture-developed zones are the dominant carriers of gas migration.