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传统的渗流理论一般假设流体流动的多孔介质骨架是完全刚性的,即在孔隙流体压力变化过程中,固体骨架不产生任何弹性或塑性变形,这时可将渗流作为非耦合问题来研究。这种简化虽然可以得到问题的近似解,但存在许多缺陷,而且也不切合生产实际。比如:在油田开采过程中,孔隙流体压力会逐渐降低,将导致储层内有效应力的变化,使储层产生变形。近年来,流固耦合问题越来越受到人们的重视,这方面的研究涉及许多领域。该文介绍了有关工程涉及到的流固耦合问题,重点针对油、气开采问题,介绍了储层流固耦合渗流的特点及研究方法和理论进展,包括单相、多相流体渗流的流固耦合数学模型及有限元数值模型
The traditional seepage theory generally assumes that the fluid porous matrix is completely rigid, that is to say, the solid skeleton does not produce any elastic or plastic deformation during the pressure change of the pore fluid. In this case, the seepage can be studied as an uncoupled problem. Although this kind of simplification can get the approximate solution to the problem, it has many shortcomings and is not suitable for the actual production. For example: During the oilfield exploitation, pore fluid pressure will gradually decrease, which will lead to the change of effective stress in the reservoir and deformation of the reservoir. In recent years, the problem of fluid-solid coupling has drawn more and more attention. Research in this area involves many fields. This paper introduces the fluid-structure interaction problems involved in the project, focusing on the oil and gas exploration problems. The characteristics of the fluid-structure interaction seepage flow and the research methods and theoretical advances are introduced, including the fluid-solid Coupled Mathematical Model and Finite Element Numerical Model