湖南凤仙境弱含水基岩地区地热水资源勘查研究  

Research on geothermal water resources exploration in weakly water-bearing bedrockarea in Fengxianjing of Hunan province

作　　者：苏园园 张云 高亮 李文圣 杨风良 刘现川 张哲妮 王德 SU Yuanyuan;ZHANG Yun;GAO Liang;LI Wensheng;YANG Fengliang;LIU Xianchuan;ZHANG Zheni;WANG De(Beijing Tali New Energy Technology Development Co.,Ltd,Beijing 101118,China;The Second Geological Team of Hebei Coal Field Geology Bureau(Hebei Dry and Hot Rock Research Center),Xingtai 054001,Hebei,China;Technological Innovation Center for Exploration and Development of Dry-Hot Rock Geothermal Resources of Hebei Province,Xingtai 054001,Hebei,China;Xingtai Deep Earth Resources Exploration and Development Technology Innovation Center,Xingtai 054001,Hebei,China;Henan Electric Power Survey and Design Institute Co.,LTD.,Power China Construction Group,Zhengzhou 450007,China)

机构地区：[1]北京泰利新能源科技发展有限公司,北京101118 [2]河北省煤田地质局第二地质队(河北省干热岩研究中心),河北邢台054001 [3]河北省干热岩型地热资源勘查开发技术创新中心,河北邢台054001 [4]邢台市深地资源勘探开发技术创新中心,河北邢台054001 [5]中国电建集团河南省电力勘测设计院有限公司,郑州45007

出　　处：《地质装备》2025年第2期33-39,共7页Equipment for Geotechnical Engineering

摘　　要：根据地热资源热储类型划分,湘西州凤凰县凤仙境地区的地热资源属于带状热储。该热储由以对流热传为主、平面上呈条带状延伸且具有有效空隙和渗透性的断裂带构成,且还处于富水性极弱的基岩地区,增加了地热勘查的难度,因此查明该区域的导热导水通道至关重要。为查明工区地热资源赋存情况,首先调查研究区域地质构造,在工区北东部开展可控源音频大地电磁测深(CSAMT)进行验证;其次,针对综合推测出的工区内隐伏断层以及强干扰的电磁环境背景,采取了优化发射机系统及调整偶极位置等措施,在工区内开展CSAMT测量工作;最后,根据综合物探反演数据以及对导热导水通道的研究结果,推测出了隐伏断层的空间展布形态,并确定了一处地热井位。经采用欠平衡钻井技术钻探验证,成功钻遇导热导水断层,井深1820 m,出水量463 m 3/d,温度49℃。本次的研究成果对于类似富水性差基岩地区地热水资源勘查能够提供有益的参考作用。According to the classification of geothermal resource reservoir types,the geothermal resources in Fengxianjing area of Fenghuang county,Xiangxi Tujia and Miao autonomous prefecture,fall into strip-shaped thermal reservoir.This thermal reservoir is composed of a fault zone that is mainly convective heat transfer,extends in a strip shape on the plane,and has effective voids and permeability.It is also located in a bedrock area with extremely weak water richness,which increases the difficulty of geothermal exploration.Therefore,it is crucial to identify the thermal and water conducting channels in this area. To investigate the occurrence of geothermal resources in the work area, the regional geological structure was firstly investigated and studied with controlled source audio magnetotelluric sounding (CSAMT) conducted in the northeast of the work area for verification;Secondly, measures were taken to optimize the transmitter system and adjust the dipole position in response to the inferred hidden faults and strong electromagnetic environment background within the work area , and to carry out CSAMT measurement work within the work area;Finally, based on the comprehensive geophysical inversion data and the research results of thermal and water conducting channels, the spatial distribution pattern of hidden faults was inferred, and a geothermal well location was determined . Through the use of unbalanced drilling technology for drilling verification, a thermal conductivity and water conductivity fault was successfully encountered with a depth of 1820 meters, a water output of 463 m 3/d and a temperature of 49 ℃. The research results of this study can provide valuable reference for the exploration of geothermal water resources in areas with poor water rich bedrock.

关 键 词：弱含水基岩 地热水 资源勘查 隐伏构造 CSAMT 

分 类 号：P631[天文地球—地质矿产勘探] P314[天文地球—地质学]