渤海湾盆地油气富集带的形成与分布

Formation and Distribution of Oil and Gas Abundance Zones in Bohai Bay Basin.

渤海湾盆地含油气系统资源丰度大于40×10~4t/km^2、存在源自盆外隆起的大型砂体和良好的聚油构造背景是油气富集带形成的三个基本条件。已发现的油气富集带可分为凹陷中央凸起油气富集带、凹陷之间基岩凸起油气富集带、凹陷中央挤压背斜油气富集带、鼻状构造油气富集带,逆牵引背斜油气富集带五种类型。不同类型油气富集的分布受凹陷构造演化历史和结构特点的差异控制。

The abundance of oil and gas resources with higherthan 40 × 10~4/km^2, the large-scale sand body from up-lifts outside the basin and godd oil accumulation struc-tore are three basic conditions for an oil-gas abundancezone in Bohai Bay Basin. The discovered oil-gas abun-dance zones are divided into five types - the central archoil-gas abundance zone in the depression, the matrix archoil-gas ablundance zone between depressions, the centralcompressional anticline oil-gas abundance zone in thedepression, the nose structure oil-gas abundance zoneand the antithetic drag oil-gas abundance zone. Distribu-tion of different oil-gas abundance zones is controlled byevolution history of depression structure and differentstructure characters.