太原西山煤田古交区块煤层气成藏地质单因素分析

发布时间：2018-03-20 15:46

本文选题：太原西山煤田　切入点：煤层气成藏　出处：《中国煤炭》2017年04期 　论文类型：期刊论文

【摘要】：为了分析太原西山煤田古交区块内影响煤层气成藏的地质因素,本文从含煤岩系地层分析入手,讨论了煤储层顶底板岩性与厚度、煤层厚度、煤岩煤质、煤化程度、储层埋深、区域构造热事件以及地质构造与煤层气成藏之间的关系。研究结果表明,煤层顶底板厚度与储层气含量不具有明显的相关性;气含量与煤储层厚度呈正相关,与煤中灰分、挥发分和水分含量呈负相关。含煤岩系煤储层至少经历了三次生烃高峰,煤层热演化是影响煤层气生成量的主控因素;区内主体向斜和正断层的断裂构造是控气的主要原因。研究区煤层气成藏主要受控于煤化作用与构造特征,同时受煤储层埋藏深度和煤层厚度影响,是多种因素影响下综合作用的结果。
[Abstract]:In order to analyze the geological factors affecting coalbed methane reservoir formation in Gujiao block of Xishan coalfield in Taiyuan, this paper begins with the analysis of coal-bearing strata, and discusses the characteristics and thickness of coal reservoir roof and bottom slate, coal seam thickness, coal rock coal quality, coal conversion degree, reservoir depth, etc. The results show that there is no obvious correlation between the thickness of coal seam roof and floor and the gas content of the reservoir, and the gas content is positively correlated with the thickness of coal reservoir and with the ash content in coal. Volatile matter and water content are negatively correlated. Coal bed coal reservoir has experienced at least three secondary hydrocarbon generation peaks, and thermal evolution of coal seam is the main controlling factor of coal bed methane production. The fault structure of the main syncline and normal fault is the main reason for controlling gas. The coalbed methane reservoir formation in the study area is mainly controlled by the coalification process and the structural characteristics, and is also affected by the buried depth of the coal reservoir and the thickness of the coal seam. It is the result of comprehensive action under the influence of many factors.
【作者单位】：太原理工大学矿业工程学院;煤与煤系气地质山西省重点实验室;
【基金】：山西省煤基重点科技攻关项目——山西省煤层气成藏模式与储层评价(MQ2014-01)
【分类号】：P618.13

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