煤田地质与勘探2019，Vol.47Issue(6)：67-72,77,7.DOI:10.3969/j.issn.1001-1986.2019.06.011
沁水盆地南部潘庄区块废弃矿井煤层气地球化学特征及成因
Origin and geochemical characteristics of coalbed methane in abandoned coal mines, Panzhuang block, southern Qinshui basin
摘要
Abstract
In order to analyze the carbon and oxygen composition and origin of the coal seam gas(CSG) in abandoned mines, Panzhuang block, south of Qinshui basin, in this paper, the coalbed methane and produced water samples were collected. The results show that the CSG of abandoned mines is dominated by CH4, the average is 9l.99%, with minor amounts of N2(6.73%) and CO2(1.26%). Theδ13c values of CH4 range from -31.36‰ to -33.53‰, with an average of -32.25‰, the hydrogen isotope(δD) value is between -182.76‰ and -193.20‰, and the average value is -187.538‰. The mam ions in produced water of abandoned mine are mainly composed of Mg2+, K+, HCO-3 , C1-, Na+, SO2-4 and NO-3 , and the type is Mg-(HCO3)2. The CH4 was mainly generated from thermal cracking during coalification, with some microbial genetic methane. Compared with the unexploited coal seams, the abandoned coal mine is more suitable for methanogen to produce the CH4.关键词
废弃矿井；煤层气；碳氢同位素；次生生物气；成因；沁水盆地潘庄区块Key words
abandoned coal mine/coalbed methane(CBM)/carbon and oxygen isotope/microbial methane/origin/Panzhuang block/Qinshui basin分类
天文与地球科学引用本文复制引用
刘超1,2,冯国瑞1,3,曾凡桂1,2..沁水盆地南部潘庄区块废弃矿井煤层气地球化学特征及成因[J].煤田地质与勘探,2019,47(6):67-72,77,7.基金项目
山西省基础研究基金项目(201801D221050) （201801D221050）
