TECTONIC VARIATION CHARACTERISTICS AND CONTROLLING FUNCTION IN THE EASTERN PART OF THE LINQING DEPRESSION

Using the principle of tilt variation, this paper analyzed the structures in the eastern part of the Linqing Depression, and summarized the basic structural characteristics of caprock sequences in the Paleogene and the controlling function of tilt variation to deposit. The research showed that the tilted fault blocks were the primary structure units in the basin and tilt variation not only controlled the evolution of the basin but also affected the development of paleogeomorphology in source areas. In the meantime, they also played an important role in controlling the types, distuibution and evolution of sedimentary systems in the basin. The fault troughs and the down slops close to the master controlling fault are the favorable positions for the development of oil-generating sags, while the up slopes and fault ridge areas far away from the fault are the main direction areas of hydrocarbon migration.