煤层气达西、非达西渗流理论和扩散理论的研究进展综述

Research Progress and Review on Darcy and Non-Darcy Flow Theory and Diffusion Theory of Coalbed Methane

大量实验与资料表明煤层气在开采中普遍存在达西、非达西渗流和扩散三种流态。通过调研国内外相关文献,对煤层气达西、非达西理论和扩散理论的研究进展进行了综述,其中包括达西渗流理论、非达西渗流理论、线性扩散理论、渗透与扩散理论、考虑多种因素的非线性扩散理论,并分析了这些理论的真实性与存在的问题,指出了其未来的发展方向。

A large number of experiments and data indicate that there are three kinds of flow regimes of Darcy and non-Darcy seepage and diffusion in the exploitation of coalbed methane.Through the investigation of relevant domestic and foreign literatures,the research progresses on the theory of coalbed methane Darcy and non-Darcy and diffusion theory are reviewed,which include Darcy’s seepage theory,non-Darcy’s seepage theory,linear diffusion theory,infiltration and diffusion theory,nonlinear diffusion theory considering various factors,and analysis of the authenticity and existing problems of these theories,pointing out the development direction in the future.