基于水化学同位素技术的地热储层成因模式对比分析——以鲁西北埕宁隆起区为例  

Comparative analysis of the genesis models of different geothermal reservoirs in Chengning uplift area in northwest Shandong based on hydrochemical isotope technology

作　　者：崔锐 王学鹏 冯波[1,2] 刘曦遥 冯守涛 刘帅 CUI Rui;WANG Xuepeng;FENG Bo;LIU Xiyao;FENG Shoutao;LIU Shuai(Key Laboratory of Groundwater Resources and Environment,Ministry of Education,Jilin University,Changchun,Jilin 130021,China;Engineering Center of Geothermal Resources Development Technology and Equipment,Ministry of Education,Jilin University,Changchun,Jilin 130021,China;The Second Team of Hydrogeology and Engineering Geology,Shandong Provincial Bureau of Geology&Mineral Resources(Shandong Provincial Lubei Geo-engineering Exploration Institute),Dezhou,Shandong 253072,China;Shandong Engineering Technology Research Center for Geothermal Clean Energy Exploration and Reinjection,Dezhou,Shandong 253072,China;Dezhou Key Laboratory of Deep Geological Energy Saving and Carbon Reduction,Dezhou,Shandong 253072,China)

机构地区：[1]吉林大学地下水资源与环境教育部重点实验室,吉林长春130021 [2]吉林大学地热资源开发技术与装备教育部工程中心,吉林长春130021 [3]山东省地质矿产勘查开发局第二水文地质工程地质大队(山东省鲁北地质工程勘察院),山东德州253072 [4]山东省地热清洁能源探测开发与回灌工程技术研究中心,山东德州253072 [5]德州市深层地质能节能减碳重点实验室,山东德州253072

出　　处：《中国岩溶》2023年第5期969-981,994,共14页Carsologica Sinica

基　　金：山东省地质矿产勘查开发局地质勘查和科技创新项目(202017);吉林省科技厅重点研发项目(20200403147SF)。

摘　　要：埕宁隆起区是我国重要的地热资源富集地区之一,了解地热田的成因模式对于地热资源的可持续开发利用具有重要意义。采用水化学同位素手段,对埕宁隆起区馆陶组砂岩热储和寒武-奥陶系岩溶热储成因进行对比分析,结果表明:砂岩热储地热水是地质历史时期的大气降水入渗补给的产物,为侧向径流补给水,而岩溶热储地热水不是直接来源于大气降水的就近入渗补给,而是经过较长距离的径流过程,具有明显的氢氧漂移现象。两套热储地热水补给高程、热储温度及热水循环深度分别为459 m和557 m、66℃和72℃、1420 m和1795 m。此外,研究成果还揭示埕宁隆起区地热水补给区位于泰山地区,其地热系统热源为地壳深部及少部分上地幔传导热流。The Chengning Uplift Area is one of the important areas rich in extremely abundant geothermal resource in China.At present,geothermal resources in the study area are mostly used in the fields such as bathing,medical treatment,and heating.According to the existing geothermal geological data and analysis results,the total geothermal resources in this area are 1.70×1020 J,equivalent to 57.86×108 t of standard coal.Therefore,elucidating the genesis model of geothermal fields in this area is of great significance for the sustainable development and utilization of geothermal resources.This study uses hydrochemical isotope technology to compare and analyze the genesis of the sandstone thermal reservoir of Guantao Formation and the Cambrian-Ordovician karst thermal reservoir in the Chengning Uplift Area.The research results indicate that the cations in the geothermal water from sandstone and karst thermal reservoirs in this area are mainly Na+,and the anions are mainly Cl-.The mineralization degree of geothermal water in sandstone thermal reservoir is 4.19-5.96 g·L^(-1),with a pH value of 7.35-9.43,indicating neutral to weakly alkaline water.The mineralization degree of geothermal water in karst thermal reservoir is 5.91-11.10 g·L^(-1),and the pH value is 6.50-7.29;therefore,it is classified as neutral water according to its acidity and alkalinity.The geothermal water from sandstone thermal reservoir in this area is a product of atmospheric precipitation infiltration and replenishment during geological history,supplying water by lateral runoff.However,the geothermal water in karst thermal reservoir does not directly come from the nearest infiltration recharge of atmospheric precipitation,but through a longer distance runoff process,which has an obvious phenomenon of hydrogen and oxygen drift.The two sets of elevation of geothermal water supply,temperature of thermal reservior and depth of hot water circulation are respectively 459 m and 557 m,66℃and 72℃,and 1,420 m and 1,795 m.From this,it can be seen that geothe

关 键 词：埕宁隆起 水化学 同位素技术 热储成因模式 地热储层 

分 类 号：P314[天文地球—固体地球物理学]