煤层气开采过程中裂缝系统与渗透率演化关系

煤中会自然形成裂隙，从人类认识到其存在，其历史到至今已经有一百多年了。开发煤层气的实践已经表明了：煤岩的裂缝与渗透率是制约我国煤层气资源开发的关健因素。裂缝性质对煤层气的产出有着很大的影响。煤层是属于裂缝性的储层，它的煤层的渗透率以及其的排液能力，被其裂缝的孔隙度、开度、及间距等所控制着。

Evolution of Fracture System and Permeability During Coal-bed Methane Extraction

The crack is naturally formed in coal, people ,has known the phenomenon for more than a hundred years. The development practice of coalbed gas shows, the crack and permeability of coal rock are the key wors restricting the development of coal bed gas resources in China. The nature of the crack has big effect on coal-bed methane eXtraction. The coal seam belongs to fractured reservoir, its fracture porosity, crack opening and crack spacing control permeability and drainage capacity of the coal seam.