论文部分内容阅读
实验测试分析表明,沁水盆地煤储层孔隙系统具有以下共同特点：孔隙度相对较小,孔隙结构以微孔和小孔为主,中孔次之,大孔很不发育,这种孔隙结构总体上对煤层气的产出不利．同时也发现沁水盆地高煤级煤储层孔隙结构具有一定的差异性,这种差异必然导致高煤级煤储层具有不同的吸附、解吸、扩散及渗透物性．应用聚类分析方法对大量测试结果分析归类并选择典型样品,建立了相应煤储层孔隙系统的四种模型,分析了各孔隙模型对应的储层物性优劣,对于沁水盆地煤层气的勘探开发具有一定的指导意义．
Experimental analysis shows that the pore system of coal reservoir in Qinshui Basin has the following common features: the porosity is relatively small, the pore structure is dominated by micropores and pores, the mesopores are secondary, and the macropores are not well developed. The pore structure Overall, the output of coalbed methane is unfavorable. At the same time, it is also found that the pore structure of high-rank coal reservoirs in Qinshui Basin has some differences. Such differences will inevitably lead to different adsorption, desorption, diffusion and permeability of high-rank coal reservoirs. Cluster analysis is used to analyze and classify a large number of test results, and typical samples are selected. Four models of pore system of corresponding coal reservoirs are established, and the reservoir physical properties corresponding to each pore model are analyzed. For CBM in Qinshui Basin Exploration and development have some guiding significance.