摘要
不同煤阶运移通道的差异性研究可对煤层气开发工艺的选择和参数的确定具有重要的理论意义和指导生产的实际意义。利用达西渗流理论,判定了煤层气流态和渗透率之间的关系,进而借助实验室方法测定了不同煤阶煤储层的渗透率,最终利用煤层气流态建立了煤储层渗透率与运移通道的关系,总结出了不同煤阶煤层气运移通道的差异性:①低煤阶:煤储层运移通道是基质孔隙起主导作用;②中煤阶:煤储层运移通道是割理、裂隙并重;③高煤阶:煤储层运移通道是裂隙起主导作用。
The study on migration pathway discrepancy of CBM in coal reservoirs with different coal ranks has important theoretical and practical significances in selection of CBM exploitation technology and parameters.Using Darcy＇s theory on seepage flow has bridged relations between CBM flow pattern and permeability.Then in virtue of laboratory method,measured permeability of coal reservoirs with different coal ranks,finally summed up the CBM migration pathway discrepancy in coal reservoirs with different coal ranks：（1） in low coal rank reservoir,the pathway is mainly through matrix pores;（2） in medium coal rank reservoir,through both cleats and fractures;（3） in high coal rank reservoir,mainly through fractures.
出处
《中国煤炭地质》
2012年第4期24-26,30,共4页
Coal Geology of China
基金
国家科技重大专项项目2011ZX05038
关键词
煤阶
运移通道
差异性
流态
渗透率
coal rank
migration pathway
discrepancy
flow pattern
permeability
