Foreland basins in west-central China can be divided into early-failed

reconstructed and superimposed types.Their architectural features have determined the differences of reservoiring conditions

such as source rocks and reservoir-seal combination

in foreland basins.Late development of foreland has obviously controlled the evolution of source rocks in the reconstructed and superimposed foreland basins in west-central China.The differences of reservoiring geological conditions of different foreland basin types in west-central China have determined that they would have different reservoiring processes.Late Yanshanian is the major reservoiring stage of early-failed foreland basins

such as the foreland basin in western Sichuan

while late Himalayan appears as the adjusting and finalizing stages of gas reservoirs.Late Himalayan is the major reservoiring stage of reconstructed foreland basins

such as the foreland thrust belt on the northern edge of Qaidam basin.Superimposed foreland basins

such as the southern Junggar foreland basin

have the characteristics of multistage reservoiring with late Himalayan being the most important reservoiring stage.