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

作　　者：贾冬磊 王海超 田继军[1,2] 夏大平 王博[6] 宫庆成 JIA Donglei;WANG Haichao;TIAN Jijun;XIA Daping;WANG Bo;GONG Qingcheng(Xinjiang Key Laboratory for Geodynamic Processes and Metallogenic Prognosis of Central Asian Orogenic Belt,Xinjiang University,Urumqi 830047,China;College of Geology and Mining Engineering,Xinjiang University,Urumqi 830049,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University,Jiaozuo 454003,China;Collaborative Innovation Center of Coalbed(Shale)Gas in the Central Plains Economic Zone,Jiaozuo 454003,China;Xinjiang Uygur Autonomous Region Coalbed Methane Testing Institute,Urumqi 830002,China;Liuhuanggou Coal Mine,Yankuang Xinjiang Mining Co.,Ltd.,Urumqi 831100,China)

机构地区：[1]新疆大学中亚造山带大陆动力学与成矿预测自治区重点实验室,新疆乌鲁木齐830017 [2]新疆大学地质与矿业工程学院,新疆乌鲁木齐830049 [3]河南理工大学能源科学与工程学院,河南焦作454003 [4]河南理工大学瓦斯地质与瓦斯治理国家重点实验室培育基地,河南焦作454003 [5]中原经济区煤层(页岩)气协同创新中心,河南焦作454003 [6]新疆维吾尔自治区煤层气测试研究所,新疆乌鲁木齐830002 [7]兖矿新疆矿业有限公司硫磺沟煤矿,新疆乌鲁木齐831100

出　　处：《煤矿安全》2025年第2期173-184,共12页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(42262021,U1903303,41902171);新疆维吾尔自治区天山青年计划资助项目(2020Q065)。

摘　　要：为探究阜康矿区煤层产出水的水文地球化学特征、火烧区滞水层和煤层水的补给关系以及水化学演化模式,采集了该矿区3个井区的煤层气井产出水样,开展了离子浓度、矿化度、氢氧同位素以及溶解无机碳同位素的测试及展布特征分析,并采用对比、分析方法,结合构造特征和水文地质条件进行了分析。研究表明:3个井区的煤层气井产出水以Na-HCO_(3)和Na-HCO_(3)·Cl型水为主,矿化度较高;火烧区滞水层是C井区煤层水的重要补给来源,从火烧区滞水层处向阜康向斜轴部呈现出补给区向滞流区过渡的特征;3个井区的氢氧同位素均落在大气降水线附近,且C井区的氢氧同位素表现出明显的^(18)O漂移特征,主要因为地下水在火烧区滞水层发生了^(18)O漂移;C井区煤层气井产出水的δ^(13)C_(DIC)的值最大,表明微生物作用强烈,存在次生生物气;3个井区的溶解无机碳同位素与硫酸根含量呈负相关关系,且与产气量的相关性明显,可作为判识次生生物煤层气富集有利区的参考因素。In order to explore the hydrogeochemical characteristics of coal seam water produced in Fukang Mining Area,the recharge 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 characteristics of ion concentration,mineralization,hydrogen-oxygen isotope and dissolved inorganic carbon isotope,and analyzed by comparative and analysis methods,combined with structural characteristics and hydrogeological conditions.Research shows that the produced water of coalbed methane wells in the three well areas is mainly Na-HCO_(3)and Na-HCO_(3)·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 stagnant water layer in the burning area to Fukang inclined axis is characteristic of the recharge area to the stagnant water area;the hydrogen-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^(18)O drift,which was mainly due to the^(18)O drift of groundwater in the stagnant water layer in the burning area;the value ofδ^(13)C_(DIC)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 

分 类 号：TD712[矿业工程—矿井通风与安全]