陕西招贤矿煤层渗透率特征及其各向异性研究
Study on Characteristics and Anisotropy of Coal Seam Permeability in Zhaoxian Coal Mine, Shanxi
DOI: 10.12677/ME.2018.62017, PDF,    国家自然科学基金支持
作者: 吴卫星*：陕西金源招贤矿业有限公司，陕西 宝鸡
关键词: 煤层；渗透率；有效应力；孔隙压力；各向异性；Coal Seam； Permeability； Effective Stress； Pore Pressure； Anisotropy
摘要: 为了探讨陕西招贤矿区煤层瓦斯的渗流特征及煤储层渗透率的主要影响因素，采集了研究区3#煤层的煤样，在不同轴压和气体压力梯度下，对陕西招贤矿内煤样进行三轴应力条件下的甲烷渗流实验，分析有效应力和孔隙压力因素对渗透率的影响。认为渗透率与有效应力呈负指数相关关系，与孔隙压力亦呈现出负指数相关关系。煤储层渗透性存在各向异性，平行层面与垂直层面的渗透率存在较大差异，并探讨了渗透率差异性的机理。
Abstract: In order to discuss the seepage characteristics of coal seam gas and the main influence factors of the permeability of coal reservoir in Shanxi Zhaoxian minging area, we collected the samples of 3# coal seam. In different conditions of axial compression and gas pressure gradient, the CH4 seepage experiments of some samples were carried out in three-dimensional stress field, and the effect of effective stress and pore pressure factors on permeability were analyzed. It is considered that the permeability is negatively exponentially related to the effective stress and has a negative exponential correlation with the pore pressure. The permeability of coal reservoir is anisotropic, and the permeability of parallel and vertical is different, and the mechanism of permeability difference is discussed.
文章引用：吴卫星. 陕西招贤矿煤层渗透率特征及其各向异性研究[J]. 矿山工程, 2018, 6(2): 119-125. https://doi.org/10.12677/ME.2018.62017

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