煤矿安全2025，Vol.56Issue(2)：173-184,12.DOI:10.13347/j.cnki.mkaq.20230291
阜康矿区煤层气井产出水水文地球化学特征及意义
Hydrogeochemical characteristics and significance of produced water from coalbed methane wells in Fukang Mining Area
摘要
Abstract
In order to explore the hydrogeochemical characteristics of coal seam water produced in Fukang Mining Area,the re-charge relationship between stagnant aquifer and coal seam water in the fire area and the water chemical evolution model,this study collected water samples from coalbed methane wells in three well areas of the mining area,and carried out the test and spread charac-teristics of ion concentration,mineralization,hydrogen-oxygen isotope and dissolved inorganic carbon isotope,and analyzed by com-parative and analysis methods,combined with structural characteristics and hydrogeological conditions.Research shows that the pro-duced water of coalbed methane wells in the three well areas is mainly Na-HCO3 and Na-HCO3·Cl type water with high salinity;the stagnant water layer in the burning area is an important source of coal seam water supply in well C,and the transition from the stag-nant water layer in the burning area to Fukang inclined axis is characteristic of the recharge area to the stagnant water area;the hy-drogen-oxygen isotopes in the three well areas all fell near the atmospheric precipitation line,and the hydrogen-oxygen isotopes in the C well area showed obvious 18O drift,which was mainly due to the 18O drift of groundwater in the stagnant water layer in the burning area;the value of δ13CDIC in the produced water of coalbed methane wells in C well area was the largest,indicating that the microbial effect was strong and secondary biogas existed;the dissolved inorganic carbon isotopes in three well areas were negatively correlated with sulfate concentration,and the correlation with gas production was obvious,which could be used as a reference factor to identify the favorable area for secondary biological CBM enrichment.关键词
阜康矿区/煤层水/水化学特征/火烧区滞水层/演化模式/煤层气井Key words
Fukang Mining Area/coal seam water/chemical characteristics of water/stagnant layer in fire burning area/evolution-ary pattern/coalbed methane well分类
矿业与冶金引用本文复制引用
贾冬磊,王海超,田继军,夏大平,王博,宫庆成..阜康矿区煤层气井产出水水文地球化学特征及意义[J].煤矿安全,2025,56(2):173-184,12.基金项目
国家自然科学基金资助项目(42262021,U1903303,41902171) （42262021,U1903303,41902171）
新疆维吾尔自治区天山青年计划资助项目(2020Q065) （2020Q065）
