关键词: 变换带, 变换断层, 变换构造, 油气成藏, 渤海湾盆地

Abstract:

On the basis of the previous classification research, the features of transfer structure in Bohai Bay Basin were analyzed. The transfer structures in Bohai Bay Basin can be divided into two styles of transfer zone and transfer fault according to the connection or non-connection status. The transfer structure in Bohai Bay Basin is mainly exhibited in the style of transfer zone, especially in basin or depression, while the transfer fault only militates in the sag-control level. With the occasional development of transfer fault, most of high-level transfer zones are horizontally connected with different relay ramps. These strike transfer structures in NWW-NW direction are the most important structure styles to control the "north-south segmentation" tectonic framework in Bohai Bay Basin. The difference of oil and gas reserves in Bohai Bay Basin is related to the distribution of prolific hydrocarbon depressions and sags controlled by transfer structure. The paleotopography and rich-sand drainage channels controlled by transfer structure are favorable to the formation of lithologic reservoirs. The adjacent zones of the transfer structure are the important regions for finding the buried-hill structure reservoirs.

Key words: transfer structure, transfer zone, transfer fault, hydrocarbon accumulation, Bohai Bay Basin