According to basin's evolutional history and structural features

the sedimentary basins in China can be divided into monotype and superimposed type basins.The prototypes of the monotype basins can further be divided into craton basins

extensional basins and compressional basins.Superposition of two or three kinds of monotype basins can result in various kinds of superimposed basins.Research of hydrocarbon accumulation in superimposed basins should focus on analyzing the dynamic process of basin formation-hydrocarbon generation-hydrocarbon accumulation.In respect of basin formation

basin-and-range coupling during the key tectonic movements and formation and reformation of basin structures are the bases of research.In respect of hydrocarbon generation

study of sedimentary environment of Paleozoic marine carbonates and good source rocks

and(mecha-)nisms and efficiencies of hydrocarbon generation and expulsion should be strengthened.In respect of hydrocarbon accumulation

emphasis must be placed on study of hydrocarbon accumulation and dissipation mechanisms

as well as evolution of petroleum systems.In view of the multicycle nature of geotectonic evolution in China

wave analysis is one of the effective methods that can be used to study superimposed basins.Whereas superimposed basins have the characteristics of multiple sources

multi-stage hydrocarbon migration and accumulation

multi-stage reservoiring and adjustment

the ideology of "element-structure-function" system is applied to propose the concept of reservoiring system

and the "source-location" classification scheme is used to establish 6 structural types of reservoiring system.