【摘要】 运用多孔介质构造应力场驱动油气运移的流固耦合分析方法,对柴达木盆地北缘地区现今构造应力场及流体运移势场进行数值模拟,揭示柴达木盆地北缘地区油气运聚的主要规律:①一级构造压力低值区主要受区域北西西向一级构造带的控制,二级构造压力低值区多位于北东向、东西向与北西向构造带的交叉复合部位;②由浅层向深层,北东向、东西向构造压力低值区范围有逐渐扩大趋势;③不同构造层油气流矢量聚集区往往是构造压力低值区,因此,流矢量指向区应该就是油气聚集的有利部位。更多还原

【Abstract】 On the basis of the fluid-solid coupling analysis, several numerical models were used to simulate the tectonic stress and fluid migration potential fields in northern Qaidam Basin. As a result, some migration and accumulation regularities of petroleum and natural gas in this area have been revealed: ①The main lower stress areas are controlled by regional NWW-striking tectonic belts. The sub-lower stress belts are distributed at the locations having relatively complex tectonics. They are mostly at intersecting positions between the NNE- or EW-striking faults and the NW- or NWW-striking faults. ②The NE- and EW-striking lower tectonic pressure belts tend to enlarge with depth. ③The areas with relatively low tectonic stress shown by arrows of fluxion vectors in various structural layers usually indicate places of accumulation of petroleum and natural gas.更多还原