以支塘向斜主采煤层含气量分布特征及其控制机理分析  

Distribution Characteristics and Control Mechanism of Main Coal Seam Gas Content in Yizhitang Syncline

作　　者：孙昌花 杜明洋[3,4] 金留青 董磊 吴圣 SUN Chang-hua;DU Ming-yang;JIN Liu-qing;DONG Lei;WU Sheng(Guizhou Natural Gas Energy Investment Co.,Ltd.,Guiyang 550081,China;Guizhou Unconventional Gas R＆D Center,Guiyang 550081,China;MOE Key Lab of Coalbed Methane Resources and Reservoir Formation Process,China University of Mining and Technology,Xuzhou 221008,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]贵州天然气能源投资股份有限公司,贵阳550081 [2]贵州省非常规天然气勘探开发利用工程研究中心,贵阳550081 [3]中国矿业大学煤层气资源与成藏过程教育部重点实验室,江苏徐州221008 [4]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《煤炭技术》2018年第9期109-112,共4页Coal Technology

基　　金：国家自然科学基金项目(41572140);国家科技重大专项(2016ZX05044);中央高校基本科研业务费(2015XKZD07);江苏省青蓝工程项目

摘　　要：为了分析以支塘向斜主采煤层含气量的分布特征及其控制机理,对以支塘向斜主采煤层含气量进行了研究。研究表明,在区域上,煤层含气量呈现"轴部高于两翼、中间高于边缘"的变化趋势;在层域上,煤层平均含气量随层位变化显现出以6#、10#、23#煤层为界的3个完整的旋回。研究区煤层含气量在埋深约850 m处出现了异常,埋深约850 m可能为此向斜的"含气性临界深度"。在临界深度以深,地温似乎成为控制含气量富集的主导因素。In order to analyze the distribution characteristics of Yizhitang syncline main coal seam gas content and its control mechanism, the gas bearing capacity of the main coal seam in Yizhitang syncline is studied. The study shows that in the region, the gas content of coal seam presents the trend of ＂the axis is higher than the two wings and the middle is higher than the edge＂; in the layer, the average gas content of the coal seam changes with the horizon, showing 3 complete cycles with the boundaries of 6#,10#, 23#coal seams as the boundary. The gas content of coal seam changes abnormally at depth of about 850 m. The buried depth of about 850 m may be the ＂gas-bearing critical depth＂. Deep at the critical depth, geothermal seems to be the dominant factor controlling the enrichment of gas content.

关 键 词：以支塘向斜 煤层含气量 分布特征 控制机理 

分 类 号：P618.13[天文地球—矿床学]