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渤海湾盆地隐蔽油气藏的形成与分布 ,总体上受控于裂谷断陷湖盆的生成演化。中新生代以来 ,多旋回的挤压、走滑与伸展作用 ,使华北地台解体 ,地壳薄化 ,并形成由一系列掀斜断块组成的裂谷盆地。在盆地内 ,常出现含油的潜山披覆背斜构造、拖曳构造、重力滑动构造、冲断构造和不同时期不同类型构造复合叠加而成的复杂隐蔽断裂构造。受老第三纪构造旋回与古气候旋回控制 ,在沉积建造上形成了 5个不整合或假整合界面和 4套层序叠覆的层序结构 ,以及富于岩相岩性变化的断陷湖盆沉积。在水进超覆层内或水进超覆层之间 ,建造的低水位扇砂体、浊积岩体、生物碎屑灰岩与火山岩体等 ,极易形成大量的地层岩性油气藏和岩性与构造复合油气藏。
The formation and distribution of subtle reservoirs in the Bohai Bay Basin are generally controlled by the evolution of the rift-lacustrine basin. Since the Mesozoic and Cenozoic, multi-cycles of extrusion, slippage and extension have caused the disintegration of North China platform and crustal thinning and the formation of a rift basin consisting of a series of overturned blocks. In the basin, oil-bearing buried hill anticline structures, tow structures, gravitational sliding structures, thrust structures and complicated concealed faults with different types of structures superimposed at different times often appear. Due to the tectonic cycle and palaeoclimate cycle control of the old Tertiary, five unconformity or pseudointegration interfaces and four sets of sequence stratigraphic superimposed structures were formed on the sedimentary foundation, and the faults rich in lithology and lithology Lake sediments. In the water into the overburden or water into the overburden, the construction of low water level fan sand bodies, turbidite bodies, bioclastic limestone and volcanic rock, easily formed a large number of stratigraphic lithologic reservoirs and Lithology and Structural Complex Reservoir.