Abstract: Elaborated the relationship between the geological factors of the composite petroleum system. Think three pond lake basin in up, middle and under three petroleum system. Petroleum system in monophyletic more storage period accumulation, composite oil, oil and gas from Permian LuCaoGou group, has early indosinian movement and the yanshan movement in the late two critical moment (mainly the former), system filling ability, the main reservoir of Permian LuCaoGou group and the, from the Jurassic system of high efficiency, resource density is big, is the main petroleum system; Petroleum system in oil and gas from the Triassic koizumi groove group, late yanshan movement period for the critical moment, duration of system from the late Triassic to the end of the age, in the white save time since late in the white world, oil and gas are mainly distributed in the sag Triassic source rock maturity, on the longitudinal is focused on the Jura.