多孔介质构造应力驱油的固流耦合分析

构造应力场是控制油气运移、聚集最重要的因素之一。依据连续介质力学理论，从理论上分析构造应力驱油的机理，应用孔隙压力和有效应力的概念，阐述了将多孔介质中的平均应力作为固体骨架和孔隙流体之间耦合桥梁的合理性。在柴达木盆地西部南翼山地区的构造应力场和油气运移聚集规律的数值模拟中，采用有限元数值模拟方法，用平均应力推导出孔隙介质中等效的流体压力和流体势，并用达西定律解出由构造应力作用引起的流体运移速度矢量场，为预测有利油气聚集区提供了依据。

Solid-fluid coupling analysis of tectonic stress drived oil-gas movement in porous media

The tectonic stress field is one of the most important factors of controlling oil and gas, migration and accumulation. According to the Continuum Mechanics the authors have analyzed the mechanism of the tectonic stress driving oil-gas to move in porous media. The concepts of effective stress and porous pressure are employed to explain why the tectonic average stress can be used as a coupling bridge between the solid skeleton and porous fluid. In the study of the tectonic stress field driving oil-gas migration and accumulation in the Nanyishan area of the west Qaidam Basin, the finite element numerical method is used to derive effective fluid pressure and fluid potential from tectonic average stress, and the Darcy law is used to get the fluid velocity fields caused by the action of tectonic stress, the results lay foundations for predicting the favorable location of oil-gas collection.