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本文论述了一种对孔隙流体运移(与油气运移密切相关)进行数值模拟的方法和结论。数学模型包括二维初始/边界值问题和沉积层孔隙压力的偏微分方程,通过给定初始条件、水动力边界条件和物性参数,可以求出与时间空间相关的孔隙压力和流体达西速度。文中的实例分析是德国北部洼陷上赤底统地层,周围为一系列断层所限。上覆镁灰岩统盐层阻止了流体的逃逸,形成下部的异常高压层。本文模拟在经过一些构造运动之后,流体沿着断层运移的孔隙压力和水平水流的瞬态变化。
This paper discusses a method and conclusion of numerical simulation of pore fluid migration (closely related to hydrocarbon migration). The mathematical model includes the two-dimensional initial / boundary-value problems and the partial differential pressure equations of pore pressure in sediment. Through the given initial conditions, hydrodynamic boundary conditions and physical parameters, time-space-related pore pressure and fluid Darcy velocity can be obtained. The case study is based on the Upper Chihati Formation in the northern German depression, surrounded by a series of faults. The overlying magmatic salt bath prevents the fluid from escaping and forms the lower anomalous high pressure layer. This paper simulates the transient changes of pore pressure and horizontal water flow along the fault after some tectonic movements.