广东龙门永汉地区水热型地热资源及其开发利用与保护  

Development,utilization and protection of hydrothermal geothermal resources in Yonghan area of Longmen,Guangdong Province

作　　者：丁正云 范爱玲 黄渊孝 DING Zhengyun;FAN Aiing;HUANG Yuanxiao(Geological Team 935 of Geology Bureau for Nonferrous Metal of Guangdong Province,Huizhou 516001,Guangdong,China)

机构地区：[1]广东省有色金属地质局九三五队,广东惠州516001

出　　处：《矿产勘查》2023年第12期2366-2376,共11页Mineral Exploration

基　　金：龙门县财政资金项目(ZZHZCG202004)资助。

摘　　要：广东龙门永汉地区地热资源储量丰富,对该地区水热型地热资源的赋存特征及开发利用与保护进行研究,对更好开发利用其地热资源具有重要意义。本文通过地热地质调查、钻探工程及降压试验等方法,对该地区地热田的地热地质条件进行了分析,评价了地热流体质量并计算了地热资源量。研究表明,较高的区域背景热流和高生热率的花岗岩体是永汉地区热储的良好热源,大气降水沿断裂带向深部渗透,经深部循环,接受热量加热形成热水后以沿升流通道向上运移形成水热对流系统,并在有利的地段聚集形成地热田。地热资源量4225.93×10^(12)kJ,地热流体可开采量13980 m^(3)/d,加权平均水温57.8~72.4℃。地热流体体质量较好,主要为HCO_(3)-Na型中性低矿化度的淡温热水,其开发利用方向为理疗洗浴、采暖、农林渔业等,可进行梯级开发利用。研究成果可为永汉地区水热型地热资源的开发利用与保护提供依据。There are abundant geothermal resources in Yonghan area of Longmen,Guangdong Province.It is of great significance to study the occurrence characteristics,exploitation,utilization and protection of hydrothermal geothermal resources in this area.By means of geothermal geological survey,drilling engineering and depressuriza-tion test,the geothermal geological conditions in this area are analyzed,the quality of geothermal fluid is evaluated and the amount of geothermal resources is calculated.The research shows that granites with high regional background heat flow and high heat generation rate are excellent heat sources for heat storage in Yonghan area.The atmospheric precipitation penetrated deep along the fault zone,receives heat to form hot water through deep circula-tion,and then migrates upward along the ascending flow channel to form hydrothermal convection system,and accumulates in favorable areas to form geothermal fields.The geothermal resources are 4225.93×10^(12) kJ,the recoverable geothermal fluid is 13980 m^(3)/d,and the weighted average water temperature is 57.8~72.4℃.Geothermal fluid body quality is good,mainly for HCO_(3)-Na type neutral low salinity light warm water,its develop-ment and utilization direction for physical therapy bath,heating,agriculture,forestry and fishery,can be carried out cascade development and utilization.The research results can provide a basis for the exploitation,utilization and protection of hydrothermal geothermal resources in Yonghan area.

关 键 词：水热型地热资源 地热地质条件 地热资源量 开发利用与保护 广东 

分 类 号：P624[天文地球—地质矿产勘探] P641[天文地球—地质学]