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河北省煤层气富集区及富集规律研究
供稿: 谢卫东;王猛;侯晓伟 时间: 2018-06-22 次数:

作者:谢卫东王猛侯晓伟

作者单位:‍中国矿业大学资源与地球科学学院中国矿业大学煤层气资源与成藏过程教育部重点实验室

摘要:为全面掌握河北省煤层气资源富集区与富集规律,通过收集河北省多矿区矿井煤层气资料、瓦斯资料、等温吸附资料等相关数据,并结合区域地质条件,对煤层气资源进行综合对比分析。结果表明,河北省煤层气分布具有时间性和空间性特征,构造演化是煤层气生成和富集的基础。基于煤层气分布规律将煤层气划分为3个富集带:太行山东麓高含气富集带受构造和水力作用控制呈"东高西低"富集规律,岩浆作用导致东侧南北向具有"南弱北强"特征,西侧南北向具有"局部强,整体弱"特征;蓟玉开平高含气富集带受构造和水力控气作用整体呈"北西翼高,南东翼低"特征;平原低含气富集带在构造演化过程中,抬升剥蚀作用使煤层上覆有效基岩厚度变小,煤层埋深虽大,但上覆巨厚冲积层不利于煤层气的保存,含气饱和度低。研究结果对河北省煤层气资源开发利用具有一定理论指导意义。

基金:江苏省自然科学基金(青年基金)资助项目(BK20150179);中央高校基本科研业务费专项资金资助项目(2015XKZD07);江苏高校优势学科建设工程项目(PAPD);

关键词:河北省煤层气;构造演化;富集区;富集规律;

Abstract:In order to study the enrichment zones and enrichment regularity of coalbed methane resources in Hebei Province, through collecting data of coalbed methane, gas data, isothermal adsorption data, and other related data in the mines of multiple mining areas in Hebei province, the paper compared and analyzed coalbed methane resources comprehensively in line with regional geological conditions. The results showed that: Tectonic evolution was the basis on coalbed methane generation and enrichment. Based on the regular of coalbed methane distribution, three enrichment zones were divided. The enrichment zone of the high gas bearing in the eastern Taihang Mountains presented“east high and west low”regular which were controlled by the tectonic and hydraulic action. The magmatism leaded to the characteristics of“south weak and north strong”in east side and“local strong and the overall weak”in west side in the north-south direction. Jinyu and Kaiping enrichment zone of high gas-bearing presented“northwest wing high and southeast wing low”features which were controlled by the tectonic and hydraulic. In the process of tectonic evolution of low gas bearing zones in plain, the effect of uplifting and denudation leaded the thickness of the effective bedrock over the coal seam to be smaller. Although the coal huried depth was large, the over burden thick alluvium was more harmful to the preservation of coalbed methane, gas saturation was lower. The research results have a certain theoretical significance for the exploitation and utilization of coalbed methane resources in Hebei province.

DOI:10.16186/j.cnki.1673-9787.2018.03.003

分类号:TE37

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