Application of Sequence Stratigraphy for Subtle Reservoir Exploration in Continental Slope Zone

Sequence stratigraphy frame of the middle strata, Shasan Member in the Dongying Depression of Bohai Bay Basin, has been established based on the data of drilling well,logging well and seismic. It was the first time that sequence cell was further classified into 4 sequences (equivalent to fourth level sequence)with help of the previous research work. Each sequence consists of LST ,TST and HST.The corresponding relationship between the unit of oil storage and the unit of stratigraphic sequence has been established. Types of reservoir sandstone and the mechanism of oil and gas accumulation in continental basins, which guides oil and gas exploration, have been known very well. This paper ended with forecast of petroleum province and advice on exploration.