This is the first time to obtain the eroded strata thickness of the fourth member of the Shahejie Formation in Huimin Depression,Bohai Bay Basin system atically by means of vitrinite reflectance.

Here we estimated the erosion thickness of the Es4 ( the fourth member of the Shahejie Formation) and Ek ( Kongdian Formation )strata in the Jiyang Depression by means of computer modeling, based on the improved sonic time difference principles, and combined with the optimizing porosity algorithm.

Guided by many theories and technologies, such as structuralgeology, new plate tectonics, high-resolution sequence stratigraphy, comprehensive research is applied to the structure and structural evolution of the fourth member of the Shahejie Formation and Kongdian Formation combining drilling with sequence analysis, regional background of structures with analysis of fault.

The approach of two-stage modeling and its application in the study of heterogeneous reservoir of Upper Member 4 of Shahejie formation in Bonan subsag;

Conditions of petroleum pools formation of the fourth member of Shahejie Formation in the west Huimin Depression;

Depositional feature of the fan delta from the fourth member of Shahejie Formation, Eogene in Bonan subsag.;

Reservoir characteristics and its controlling factor of the fourth member of Shahejie Formation in Block Shang 25 of Shanghe Oilfield;

There is a favorable condition to form the hydrocarbon reservoir of Sha No.

Lithologic oil-gas reservoirs is main reservoir characteristic of Sha No.