Abstract:

By research of high resolution sequence stratigraphy and basic condition of petroleum geology, the dominant styles of subtle.eservoir of Dainan formation in Jinhu depression has been summarized in this paper. The structure, thickness of coverage layer and cooperation of subtle trap with petroleum migration of reservoir are the dominant controlling factors of subtle reservoir.The mode of subtle reservoir has been synthesized. Based on the mode，the slopes on the west of Sanhe depression and around Longgang depression were best beneficial distribution areas of subtle reservoir have been pointed out. By using multiple technology as comparison of seismic-geology interface, precise interpretation of structure, well-restricted reverse modeling and synthetic evaluation of geology, the subtle reservoir of Dainan formation in LZ area has been predicted and evaluated.

Key words: subtle reservoir, sequence stratigraphy, Jinhu depression