【摘要】 东吴次凹由于处在具不同性质基底的渤海湾南华北裂谷盆地的交界处 ,因而NW—NWW向断裂十分发育 ,它与NNE—NE向断裂相互切割彼此牵制 ,不仅减少了沙三段这一区域上普遍具生油意义的地层段的沉积范围和厚度 ,而且抑制了深水湖相的持续发育 ,造成了该凹陷生油岩和蒸发岩不发育的特征。更多还原

【Abstract】 Dongwu subdeprssion locates in the border of Bohaiwan and Southern North-China rift. As it is controlled by interaction of two rift basements with different properties, the NW-NWW faults developed intensively in this area. The inter-excise and inter-restraints of the NW-NWW and NE-NNE faults deeply influenced the development of the Third Member of Shahejie Formation, which is a regional oil source-rock. Such a tectonic nature not only resulted in a less distribution and thinner thickness of the Third Member of Shahejie Formation, but also restrained the prevailing of deep lacustrine deposition. In addition, it caused a exclusive characteristic of without carbonate and evaporate rocks in Dongwu sub-depression different from contiguous northern and southern depressions.更多还原