摘要
黄河北煤田构造复杂,以往地质工作表明其存在较为丰富的煤层气资源。为了进一步查明黄河北煤田煤层气成藏特征及其控制因素,以太原组主采煤层13煤为例,综合分析了煤层发育、煤岩煤质、储层物性、地质构造、岩浆活动、水文地质等地质因素,探讨各项地质因素对煤层气赋存的影响。研究发现黄河北煤田13煤层及相关地质因素均有利于煤层气的生成与保存。燕山晚期的岩浆活动导致煤层变质程度升高、煤层生气及储气能力增高,这是影响研究区内煤层气成藏的主要因素。结合水文地质条件及煤层埋深条件,认为13煤的煤层气成藏条件在研究区西北部优于东南部。在解吸性能及渗透性较好的地区,有利于煤层气开采。
The Huanghebei coalfield has complex structures;previous geological works have indicated rather abundant CBM resources existed in the coalfield.To further identify CBM ore-forming features and control factors,taking the Taiyuan Formation main mineable coal No.13 as example,integratedly analyzed coal development,coal petrology and quality,reservoir physical property,geological structure,magmatic activities and hydrogeology etc geological factors,discussed impact from geological factors on CBM hosting.The study has shown that the coal No.13 and related geological factors are propitious to CBM generation and preservation.Late stage Yanshanian magmatic activities had caused upgrading of coal metamorphism degree,coal seam gas generation and preservation abilities increasing,thus the main factors to impact CBM reservoiring in the area.Combined with hydrogeological condition and coal seam buried condition have considered that coal No.13 CBM reservoiring condition in the northwestern part is excelled than southeastern part of the study area.In desorptivity and permeability better area is propitious to CBM exploitation.
作者
路长勇
王怀洪
孔凡顺
刘静
徐昌
黄鑫
Lu Changyong;Wang Huaihong;Kong Fanshun;Liu Jing;Xu Chang;Huang Xin(Shandong Provincial Coal Geological Planning,Exploration and Research Institute,Jinan,Shandong 250104;Chinese Geophysical Society Key Laboratory of Coalfield Geophysics,Shandong 250104;Shandong Provincial Academician Workstation,Jinan,Shandong 250104;Shandong Bureau of Coal Geology,Jinan,Shandong 250104)
出处
《中国煤炭地质》
2020年第12期61-67,共7页
Coal Geology of China
基金
齐河—禹城地区富铁矿深部找矿方法与矿床成因研究,鲁煤地科字(2019)3号。
关键词
13煤
煤层气
地质因素
黄河北煤田
coal No.13
CBM
geological factor
Huanghebei coalfield
