Abstract:

Geological structures in the Bohai Bay region have three different directionsand four structural stacking of uplifts and depressions. Thase structures extended mainly in EW (developed early) and NE(develop-ed late) directions and formed the tectonic framework of alternated uplifts anddepressions in plane while those distributed in NW direction (formed early orlate)are in the second place. Structural stacking of different stages and diffrent directions in space compos-ed four kinds of structure styles including overlapped uplift, overlapped depres-sion, the structures that uplifted first and then depressed and those depressedfirst and then uplifted. Among all these structures, the author suggests that,the overlapped depressions, including Qinan, Dongying, Laizhouwan, theYellow River Mouth and the Bozhong Depression, have the best hydrocarbonpotential; those uplifted first and then depressed and the ones depressed firstthen uplifted are the nextbest. These include the central part of the QikouDepression, the southern part of the Bozhong Depression and the central and northparts of the Liaodong Bay. The overlapped uplifts including the Chengzhikou,Chengbei, Shijiutuo, Bonan-Miaoxi Uplifts and the Fuzhou Depression arethe worst.