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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。
Based on the fluid-structure coupled analysis method of stress field in porous media to drive oil-gas migration, the current tectonic stress field and fluid migration potential field in the northern margin of the Qaidam Basin are numerically simulated to reveal the hydrocarbon migration and accumulation in the northern margin of Qaidam Basin The main regularities are as follows: (1) The primary pressure zone of low tectonic setting is mainly controlled by the NW-trending primary tectonic zone in the region, and the second-stage tectonic pressure low-value zone is mostly located at the intersections of the NE and NWW structural zones; From the shallow to the deep, the northeastern, east-west tectonic pressure has a tendency to widen. The range of oil-gas flow accumulation in different tectonic layers is often the tectonic pressure low-value area. Therefore, the flow vector pointing area should be the hydrocarbon accumulation The favorable position.