献县地热田碳酸盐岩热储示踪试验与模拟  

Tracer test and simulation of thermal energy storage in carbonate rocks of the Xian County geothermal field

作　　者：李亭昕 蔡永丰[1] 刘彦广[2] 刘桂宏[3] 张宏亮 秦祥熙 LI Tingxin;CAI Yongfeng;LIU Yanguang;LIU Guihong;ZHANG Hongliang;QIN Xiangxi(Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration&Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi,Guilin University of Technology,Guilin 541004,China;Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050061,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Hydrogeology Team of Hebei Coalfield Geology Bureau,Handan 056000,China;China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]桂林理工大学广西隐伏金属矿产勘查重点实验室与广西有色金属隐伏矿床勘查及材料开发协同创新中心,广西桂林541004 [2]中国地质科学院水文地质环境地质研究所,河北石家庄050061 [3]清华大学土木工程系,北京100084 [4]河北省煤田地质局水文地质队,河北邯郸056000 [5]中国地质大学(北京),北京100083

出　　处：《地学前缘》2020年第1期152-158,共7页Earth Science Frontiers

基　　金：国土资源部储量司专项(CB2016-5-7);河北省自然科学基金项目(D2019330003);国家自然科学基金项目(41502180)。

摘　　要：地热回灌过程中开采井热突破预测等理论模型方面的研究尚不完善。本文在献县地热田开展了对井回灌示踪试验,并运用Comsol Multiphysics建模软件进行了参数反演,应用该理论框架进行了示踪试验数据的定量解释及开采井热突破预测。结果表明,示踪剂回收率偏低,为0.0225%,采灌井存在1条优势通道,通道长度约为513.7m,总体表现为采灌井之间的水力联系较差。本文应用模型进行了参数反分析,计算得到拟合优度R2=0.7907>0.6,说明此优化结果与测量值有较强的相关性,拟合程度好。连续开采100a,不会发生热突破现象。The theoretical model of predicting thermal breakthrough in production well during geothermal recharge is still not perfect.In this paper,we carried out well recharge tracer test in the Xian County geothermal field and performed parameter inversion using the Comsol Multiphysics modeling software.We used the software’s theoretical framework to explain the tracer test data quantitatively and predict thermal breakthrough in heat mining wells.The results demonstrated a relatively low tracer recovery rate of0.0225%,with one preferential passage of about 513.7 mlong in the geothermal doublet well,indicating poor hydraulic connection between the doublet wells.After parametric analysis,we calculated the goodnessof-fit R2 to be 0.7907,greater than 0.6,suggesting a strong correlation between the optimization result and measured value,therefore a good model fit.Our model predicts that 100 years of continuous exploitation will not cause thermal breakthrough.

关 键 词：地热资源 碳酸盐岩热储 回灌示踪 参数反演 热突破 

分 类 号：P314[天文地球—固体地球物理学] P641[天文地球—地球物理学]