关键词: 富生烃凹陷, 新构造运动, 晚期成藏, 郯庐断裂, 渤海海域

Abstract: Bohai Sea is the first explored area in China Offshore and first oil discovery had been gained from the shallow targets. After a long-term exploration and development,the mechanism of hydrocarbon accumula-tion at shallow targets is nuderstood. Up to date the reserves discovered at shallow targets has exceeded 70% of total in Bohai Sea. Neotectonism (Bohai movement)is characterized by:(1)different Q and N center of sub-sidence,and angular unconformity between Q and N;(2)basalt effusion and magma activities frequently;(3) regular distribution of earthquake center;(4) intensive later faults(15-2Ma)forming multitude anticiline in Nm-Ng formations. In accordance to kinetic analysis of tectognesis,neotectonism was caused by mantle rise, plate movements and Tanlu faults,and it controlled the late hydrocarbon accumulation in Bohai Sea. Bohai Sea will play an important role in stabilizing oil and gas production in the eastern China.

Key words: rich hydrocarbon generative sag, neotectonism, late hydrocarbon accumulation, Tanlu faults, Bohai Sea