The sedimentary basins in eastern China(like Jiyang Depression)are characterized by dustpan-shape with marginal faults and vertical overlapping architecture.These basins formed due to the subduction of Pacific Plate under China continent

which caused crust stretching and thinning

and further resulting in a series of extension of faults.In dustpan-shaped rift basin

the tectonic intensity varies in different structural belts.Therefore

the sedimentary systems and their assemblages under their control correspond well with the palaeogeomorphology.Due to the control of tectonic evolution and depositional characteristics

the traps

carrier system and the accumulation dynamics show some orderliness of distribution

which determines the orderliness of reservoir type distribution.Secondly

the differences of the major hydrocarbon accumulation controlling factors and their assemblages between different structure belts generate the differences of hydrocarbon accumulation and reservoir patterns between different plays.Moreover

different types of subtle reservoirs are deve-loped at different structural belts.Specifically

conglomerate fan reservoirs in the steep slope belt show hydrocarbon accumulation pattern featured by diagenetic sealing.The turbidity fan reservoirs in the central-depression belt show the hydrocarbon accumulation pattern featured by pressure-subtle migration.And the beach-bar sand bodies in the gentle slope belt show hydrocarbon accumulation pattern featured by control of three elements

i.e.faulted structures

effective reservoir

and formation fluid pressure.In conclusion

the petroleum geologic features of the Paleogene dustpan-shaped rift basins in east China can be sum up as follows:regularity in the evolution of basin

correspondence in sedimentary system

orderliness of reservoir type distribution

and difference in key factors controlling hydrocarbon accumulation.