沁水盆地煤层含气量和物性随埋深变化及其应力敏感性  

Change and Stress Sensitivity of Physical Properties and Gas Content of Coal Reservoir with Depth in Qinshui Basin

作　　者：张守仁[1] 

机构地区：[1]中联煤层气有限责任公司,北京100011

出　　处：《中国煤层气》2016年第3期7-9,30,共4页China Coalbed Methane

基　　金：科技项目国家科技重大专项项目(2011ZX05042)资助

摘　　要：就沁水盆地已有煤层气井储层物性资料统计研究发现,由浅至深,煤储层含气性、孔隙度、渗透率等均具有明显阶跃性变化特征,特别是在埋深600m、900m等2个深度点具有明显的跃变;而同样,煤储层所承受的最大水平主应力也在埋深600m、900m具有明显的跃变,两者具有很好的一致性;两者间的相关关系说明了随着深度增加,最大水平主应力成为了影响煤储层物性的主要影响因素。因此,对于深煤层煤层气地质选区和井位优选,最大水平主应力应该作为一主要影响因素来考虑。According to the statistical researches of the coalbed methane data in Qinshui Basin, the gas content, the porosity, and the permeability of the coal change in jump at the depth of 600m and 900m. And likewise, the maximum horizontal principal stress has the same variation. The relation between them shows that the maximum horizontal principal stress becomes one of the important geological factors of the coal reservoir in the deep. So for the exploration of principal stress should be looked as one of the most the deep coalbed methane, the maximum horizontal important geological factors.

关 键 词：深煤层 煤层气 阶跃式变化 最大水平主应力 

分 类 号：P618.13[天文地球—矿床学]