变形介质气藏渗流理论研究的发展及研究意义

变形介质气藏的开采过程是流固藕合渗流过程。常规气藏渗流理论由于没有考虑气藏开采过程中岩石骨架的变形，因此不能准确分析气藏中流体的运动状态。变形介质气藏渗流力学理论正为了解决这一问题而发展形成的。早期主要以研究储层岩石的孔隙度、渗透率与压力之间的关系为主要目的，引入有效应力概念后，建立了线弹性变形下的渗流模型，后又发展到考虑非线弹性变形和塑性变形下流固耦合渗流力学模型，到目前为止，已开始综合考虑渗流、应力和温度场三者之间的关系，并建立了相关的耦合模型。我国变形介质渗流力学理论的研究起步较晚，是在国外理论研究的基础上发展起来的，20世纪90年代以来，随着油气田开发理论的发展，许多国内学者开始对变形介质渗流力学理论进行了深入的研究，并取得了一些研究成果，对我国现阶段主要气藏的开发具有重要的指导作用。

The Development and Significance of Study on Fluid Flowing in the Deformation Media Gas Reservoir

The theory of the fluid flowing at the deformed porous media gas reservoir is developing with the one of fluid flowing through porous media, and the production of deformation media gas reservoir is the one of fluid-solid coupling. In the early time, the main intention was to study the relation among pressure, porosity and permeability of reservoir. After the effective stress was introduced, the fluid flow model about liner elastic deformation was established, later, the fluid-solid coupling model about nonlinear elastic or plastic deformation. Now, the coupling model have been established considering the relation about fluid flow, stress and temperature. In China, the study of theory started very late and was based on the foreign theory . After 1990s, many scholars have begun to study the theory and gained many good results. And these results are very important to develop the gas reservoir in China at present. Certainly, the theory needs to be perfected continuously and be made a theory system for production.