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基于SEM图像的煤层气渗流裂隙开度影响的模拟研究

Xulou CAO,Jiangfeng LIU,Hongyang NI,Diansen YANG,Qingbin MENG

Safety in Coal Mines（2020）

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Abstract
通过SEM技术获得煤真实裂隙结构,用以解决煤的非均匀性表征问题.基于裂隙结构特征,使用COMSOL求解Stokes方程来计算气体流动的动力特性,并建立气体渗透率的计算模型,同时定量化的研究了裂隙开度对渗透率的影响.结果表明:裂隙开度对煤层气渗透率的影响很大,同时当考虑Klinkenberg效应时,修正了其气体裂隙流动模型.
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Key words
digital image,numerical simulation,crack opening,klinkenberg effect,permeability
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