摘要
针对鄂尔多斯盆地东缘不同地区煤层含气量分布不同的特点,通过分析三交-柳林、大宁-吉县和韩城地区的构造及其各主采煤层含气量分布特征,探讨了鄂尔多斯盆地东缘3个地区煤层含气量分布的构造控制作用。结果表明,燕山期构造运动是整个鄂尔多斯盆地东缘的关键构造事件;本区构造作用对煤层含气量分布的控制主要体现为控制煤层赋存状态,而构造部位、构造展布和构造性质,则控制煤的变质作用以及煤层气的保存条件;三交-柳林地区仅局部单斜构造为煤层气有利富集区,大宁-吉县地区煤层气赋存构造条件较好,应作为鄂尔多斯盆地东缘煤层气勘探开发的重点区域,韩城东部矿区煤层气赋存较差,且北压南拉的构造格局常造成含气量南低北高。
In view of different gas content distribution in different areas of the eastern edge of Ordos basin,structural control on coal seam gas content in Sanjiao-Liulin,Daning-Jixian and Hancheng was investigated by analyzing their structures and main coal seam gas content distributions.The results show that Yanshanian tectonic movement is the key tectonic event of the entire eastern edge of Ordos basin.Structural control on coal seam gas content in this region is shown mainly in coal seam occurrence,while the location,distribution and nature of tectonic have controlled coal metamorphism and coalbed methane storage conditions.Local monocline is the only favorable area of gas occurrence in Sanjiao-Liulin.Daning-Jixian shows better tectonic conditions,thereby is considered as the key area of coalbed methane exploration and exploitation.The eastern coal mining area of Hancheng presents poor gas occurrence.The tectonic framework of northern compression and southern stretching results in high gas content in the north and and low gas content in the south.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2013年第1期14-19,24,共7页
Coal Geology & Exploration
基金
国家科技重大专项项目(2008ZX05034)
国家重点基础研究发展计划(973计划)项目(2009CB219605)
关键词
鄂尔多斯盆地东缘
主采煤层
含气量
构造控制
eastern edge of the Ordos basin
main coal seam
gas content
structural control
