摘要
从野外和矿井观察统计、光学显微镜观测以及压汞、低温液氮吸附、渗透率实验室测试三个研究层次入手，对影响煤层渗透率各向异性的岩石学因素进行了分析。结果表明：在煤级相似的条件下，煤的“基质渗透性”似乎主要取决于煤层的物质组成；若煤层物质组成相似，则同一地区不同煤层或不同地区同一煤层之间渗透性的差异可能主要起因于受割理发育程度所控制的“割理渗透性”；煤层中不同煤岩类型条带的空间分布特征是决定煤层渗透性各向异性的一个重要因素。
In this paper,some factors affecting to the heterogeneity of coal permeability were discussed based on the pore-cleat system measured in the mines,under optical microscope and with some instruments.It was found:the matrix permeability appears to rely mostly on the mattre constituents of coal reservoirs if their rands are similar,and the heterogeneity of the cleat permeability seems to be largely attributable to the differentia among seams in the same area or among the areas with the same seam if the coal consitiuents are similar;the three-dimentional distribution of various coallithotype bands in the seams might be one of the most important factors by which the coal permeability is controlled.
出处
《中国煤田地质》
1997年第4期28-32,共5页
Coal Geology of China
