Comparative research on hydrocarbon generation conditions of Meso-Neoproterozoic between east and west of North China Platform

Based on the analysis of the abundance, type, thermal evolution degree of organic matter and the hydrocarbon generation history in Meso-Neoproterozoic in the North China Platform, the western part of the platform represented by the Mengshan Aulacogen was compared with the eastern part represented by the Jiliao Aulacogen in hydrocarbon generation condition. The hydrocarbon source rocks of Meso-Neoproterozoic in the eastern part of the North China Platform are premium source rocks for high abundance and good type of organic matter while the western hydrocarbon source rocks with low abundance of organic matter are only medium to bias, even though their type is also good. Although the thermal evolution of the eastern part is similar to the western part, their thermal evolutions are quite different from the Late Paleozoic: the eastern part uplifted in succession and the overlying strata denuded; while the western part continued to subside and achieved the highest thermal evolution degree in Mesozoic. Generally speaking, the Jiliao Aulacogen is the most favorable hydrocarbon generation area in the North China platform, then the Mengshan Aulacogen and the Yushan Aulacogen.