煤层气达西、非达西渗流理论和扩散理论的研究进展综述

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。

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

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.