In this paper, the paleosalinity of the upper part of 4th Member was studied on the basis of a geochemical analysis of trace elements, and three assemblies of source rocks with different geochemical characteristics were distinguished by means of cluster analysis.

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;

Sedimentary characteristics and controlling factors of beach bars in the Upper Submember of the Fourth Member of the Shahejie Formation in the Lijin subasin;

The Palaeogeomorphologic Reconstruction of Es4s in Zhuangxi Area, Bohai Bay Basin;

High-resolution sequence stratigraphic framework of the Upper Submember of the Fourth Member of the Shahejie Formation on the southern slope of the Dongying subbasin,northern Shandong,China;

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.