多孔介质孔隙结构模型及其在渗流分析中的应用

Pore Structure Model for Porous Media and Application in Seepage Analysis

对目前常用的孔隙结构模型进行了总结,将目前常用的模型分为孔隙重构模型、孔隙网络模型、等效孔隙网络模型3个类别,对上述3种模型的概念、建立方法以及在渗流分析方面的应用进行了介绍。从孔隙重构模型到孔隙网络模型再到等效孔隙网络模型,其对多孔介质孔隙结构的描述由真实性向等效性发展,而其计算效率则显著提高。基于孔隙结构模型已有研究针对渗流过程展开了大量的计算分析工作,研究表明孔隙结构模型能够较好反映多孔介质孔隙结构对渗流过程的影响,揭示渗流和物质输移过程孔隙尺度物理机理,在环境岩土工程及能源岩土工程等多个领域具有广泛的应用前景。未来孔隙结构模型研究将集中于基于孔隙结构模型建立宏微观行为的联系、基于孔隙结构统计参数建立更具普适意义的模型等方面。

In this paper,the commonly used pore structure models were summarized.The concept,construction method,and application of pore structure reconstruction model,pore network model,and equivalent pore network model were introduced.From pore structure reconstruction model to pore network model and then to equivalent pore network model,the description of pore structure develops from authenticity to equivalence,and the computational efficiency is significantly improved.A large number of studies have been carried out on seepage process on the basis of the pore structure model.Previous research shows that the pore structure model can reflect the influence of the pore structure of porous media on seepage process,and reveal the pore-scale mechanism of seepage and mass transfer process.The pore structure model has a good application prospect in many fields such as geo-environmental engineering and energy geotech-nics.The future study about the pore structure model lies on the establishment of macro/micro-behavior relationship according to pore structure model simulation and more universal model based on the equivalence of statistical parameters.