渤海海域第三系油气成藏特征

渤海海域是中国油气资源的重要接替区。研究已发现的油气田和含油构造。对分析其油气成藏特征有着现实的指导意义。渤海海域是渤海湾盆地沉积、沉降中心和晚期构造活动中心。它的地质特征和周边三个坳陷具有一定的相似性。但也有其独特的石油地质特征与油气富集规律。被富生烃凹陷包围的凸起、凹陷及边缘的断裂背斜和反转构造以及断阶带中的断块、滚动背斜、花状构造是勘探的最有利地区。新生代继承性的构造格局和晚期强烈的构造运动是造成油气向凸起区和浅层多期运移、多期充注、晚期成藏的主要原因。

Characteristics on reservoir forming of Tertiary in Bohai Sea area

Bohai Sea area is an important replacing area of petroleum resource in China. It has practical guiding significance of the study of discovered oil-gas fields and oil-bearing structures on the analysis of its characteristics of oil-gas reservoir forming. Bohai Sea area is the Bohai Bay basin center of deposition, subsidence and late tectonic activity. Its geological characteristics have similarities with three circumjacent depressions, but it has its own unique petroleum geologic features and oil-gas enrichment rules. The uplift surrounded by abundant hydrocarbon generating sag, faulted anticline and reversed structure in sag and sag edge, and the faulted block, rollover anticline and flower - like structure would be the most favorable exploratory realm. The successive tectonic pattern in the Cenozoic Era and late strong tectonic activities are the key factors that caused the multistage migration, multistage oil and gas injection and later reservoir forming of oil and gas towards uplift and shallow layers.