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中文摘要：
我国煤层普遍属于低渗透煤层,特别是晚古生代煤层的渗透率小于1毫达西大约占70%,其中煤层埋深在1000m以下的储量就有2.95万亿吨,占我国煤炭资源总量的53%。大量的煤层气资源贮存于千米以下,千米深度下的煤层要受到高地应力作用,是致密的多孔介质,对于致密的多孔介质中的渗流,气体滑脱效应十分显著。而滑脱效应的研究对搞清低渗透煤层气渗流的机理有重要作用,因此,采用实验手段研究了不同矿区低渗煤样的渗流规律;分析了围压、孔隙压对低渗煤样气体滑脱效应的影响情况;得到了低渗煤样气体滑脱效应的新的理论公式。为搞清煤体内部结构特性和煤层气在煤层中的滑脱流动机理奠定了基础,对实现低渗储层煤层气工业化开采具有重要的理论价值。
英文摘要：
In China the coal seam commonly belongs to the hypotonic reservoir, especially the neopaleozoic coal seam with permeability smaller than 1 millidarcy approximately accounts for 70 percent, among which the coal-bed methane resource with the burial 1000 m in depth amounts to 2.95 myriad hundred million tons, accounting for 53 percent of coal resources amount. Large amount of coal-bed methane resources keeps in storage under the depth of 1000 m. Under such a depth in the deep mining, the pressure of the coal-bed is considerably high, and the porous media is regarded to be highly compacted. Considering the gas seepage in this compaction porous medium, the gas slippage effect is remarkable. The researches on gas slippage effects has the important significance to reveal the gas seepage mechanism through the hypotoniccoal reservoir. The experimental studies are carried out to reveal the seepage laws of Tiefa, Huaxing and Jincheng coal samples, to analyze the impact of confining pressure and pore pressure on the gas slippage effect of the hypotonic coal samples, and to get new theoretical formula for the gas slippage effects of the hypotonic coal samples. A foundation is established to understand the internal structure of coal and coal-bed methane slippage flow in coal seams. The experiment results have theoretically significant values to carry out industrialized exploitation of coal-bed methane in hypotonic coal reservoir.
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