渤海湾盆地西部构造级序与油气分布

早白垩世至早第三纪期间，渤海湾地区在区域帚状构造应力场作用下，形成了巨型冀鲁帚状构造体系，其不同级序的构造成分均具有帚状构造体系特征，帚状构造的生成和发展不仅控制了该区的构造格局，而且控制了沉积发育、油气生成和分布．其中，一级构造控制巨型复式油气聚集带的形成和分布；二级构造控制生油凹陷的生油条件和油气富集程度；三、四级构造控制各种复合油气藏的形成与分布；五级构造是油气聚集的主要场所。进一步揭示了不同级序的构造与沉积、油气藏形成和分布的关系，对今后石油勘探开发及在成熟探区寻找隐蔽油藏有重要意义。

STRUCTURAL ORDERS AND DISTRIBUTION OF OIL AND GAS IN THE WEST PART OF BOHAI BAY BASIN

A brush tectonic stress field in Bohai Bay area from the early Cretaceous to the early Tertiary resulted from the huge Jilu brush structrual systerm. The subordinate structures of the system were also in sub-order brushes. Formation and evolution of brush structures of the different orders controlled not only tectonic framework. but also sedimentation.hydrocarbon generation and distribution in the basin. The first order structures controlled formation and distribution of massive complex petroleum accumulation belts. The second order structures controlled oil generation and abundance of the oil generation depression. The third and fourth order structures controlled the formation and distribution of the complex oil reservoirs. The fifth order structures were the fundamental units for oil accumulation. A further study of the relationships between the structures of different orders and sedimentation. formation and distribution of oil reservoir is of a great significance for exploration. development, and searching for subtle oil pools in explored areas.