山西沉积环境对煤层气盖层叠置类型及分布的控制  

Control of Superimposing Types and Distribution of Coalbed Methane Caprock by Sedimentary Environments in Shanxi Province

作　　者：赵国飞[1,2] 康天合 郭俊庆[1] 康官先[1] 张彬[1] ZHAO Guofei;KANG Tianhe;GUO Junqing;KANG Guanxian;ZHANG Bin(Key Laboratory of In-situ Property Improving Mining of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Institute of Energy,Jinzhong 030600,China)

机构地区：[1]太原理工大学原位改性采矿教育部重点实验室,山西太原030024 [2]山西能源学院,山西晋中030600

出　　处：《煤矿安全》2020年第2期159-164,共6页Safety in Coal Mines

基　　金：NSFC-山西煤基低碳联合基金资助项目(U1810102);国家自然科学基金资助项目(51174141,50974093).

摘　　要：基于山西125座煤矿的273个煤层气盖层地质数据,划分了盖层叠置类型,探讨了不同叠置类型的分布特征。考虑岩性组合及岩石致密性,将山西煤层气盖层按岩层结构分为4个叠置大类,按岩石致密程度分为11个叠置亚类。以古沉积环境为理论基础,分析不同叠置类型的分布特征:复合型盖层主要分布于大同煤田的西南部、宁武煤田中北部和沁水煤田东北部;厚层整体型盖层广泛分布于大同煤田东北部、宁武煤田北部、沁水煤田东缘;近距离煤层盖层主要分布于河东煤田中部、霍西煤田东部和西山煤田东北部;薄层状盖层仅在沁水煤田东缘部分出现。Based on the geological data of 273 coalbed methane caprocks in 125 coal mines in Shanxi Province,the superimposing types of caprock were divided,and the distribution characteristics of different superimposing types were discussed.Considering the combination of lithology and rock compactness,the coalbed methane caprocks are divided into 4 superimposed types according to the rock formation structure,11 superimposed subclasses according to the degree of rock compactness.Based on the paleo-sedimentary environment,the distribution characteristics of different superimposing types were analyzed.The composite caprocks were mainly distributed in the southwest Datong Coalfield,the north-central part of Ningwu Coalfield and the northeast Qinshui Coalfield;the thick integral caprocks were widely distributed in the northeast of Datong Coalfield,the northern part of Ningwu Coalfield,and the eastern edge of Qinshui Coalfield;the close coal seams caprocks were mainly distributed in the middle of Hedong Coalfield,east of Huoxi Coalfield and northeast of Xishan Coalfield;the thin-layer caprocks appeared only in the eastern edge of the Qinshui coal field.

关 键 词：煤层气 盖层 叠置类型 古沉积环境 分布特征 

分 类 号：TE311[石油与天然气工程—油气田开发工程]