高密度电法结合地温梯度研究羊屿地热田  

High-Density Electrical Method Combined with Geothermal Gradient Study on the Geothermal Resources of Yangyu Geothermal Field

作　　者：庾佳 谢秋芸 刘小清 桂志先[2] 黄群 Yu Jia;Xie Qiuyun;Liu Xiaoqing;Gui Zhixian;Huang Qun(Second Geological Brigade,Guangdong Provincial Geological Bureau,Shantou Guangdong 515041,China;School of Geophysics and Petroleum Resources,Yangtze University,Wuhan Hubei 434023,China)

机构地区：[1]广东省地质局第二地质大队,广东汕头515041 [2]长江大学地球物理与石油资源学院,湖北武汉434023

出　　处：《工程地球物理学报》2024年第6期1059-1067,共9页Chinese Journal of Engineering Geophysics

基　　金：汕头市自然资源局重点勘查(编号:HS22ZC021);广东省自然资源事务专项(编号:2021-1)。

摘　　要：在南澳岛羊屿村附近常年有多处低温热泉(29°)出露点,根据周边地表调查,结合长乐—南澳断裂的历史研究资料,判断研究区域可能存在南澳断裂次级导热隐伏断裂,能够提供深部热源,而受更新世活动断裂的影响,具有较好的导水性,因此判断研究区域地热资源前景良好。综合南澳岛旅游资源的开发前景和可操作性考虑,采用高密度电法探测调查羊屿村隐伏断裂的空间分布情况,结合测温井得到的地温梯度数据推导热流来源,成功圈定有利靶区。研究结果得到了钻探结果的验证,钻至800 m水温达41.1℃,抽水量达到314 m^(3)/d。验证了高密度电法在侵入岩地区的有效性,对羊屿地热田的构造分布和热源及水源取得了初步的认识,为侵入岩地区地热资源的研究提供了参考经验。The geothermal resource potential of Nan’ao Island is considered promising in the development prospects and tourism resources,Based on surveys of the surrounding surface and historical research data on the Changle—Nan’ao Fault,supported by the presence of several low-temperature hot springs(29℃)in Yangyu Village on Nan’ao Island,a popular tourist destination except for the cold days,this paper proposes that a secondary conductive hidden fault of the Nan’ao Fault exists in the study area,indicating that a deep-seated heat source,influenced by the activity of the Quaternary fault,this area exhibits good water conductivity.A high-density electrical method is employed to investigate the spatial distribution of hidden faults in Yangyu Village.Combining this with geothermal gradient data obtained from temperature measurement wells,the source of geothermal flow is successfully delineated to identify favorable target areas.The research results,validated by drilling data show that the water temperature reaches 41.1℃at a depth of 800 m and the pumping rate reaches 314 m^(3)/d.This validation demonstrates the effectiveness of high-density electrical methods in intrusive rock regions,providing preliminary insights into the structural distribution,heat source,and water source of the Yangyu geothermal field.It also offers reference experience for the research of geothermal resources in intrusive rock regions.

关 键 词：高密度电法 隐伏断裂 地温梯度 地热资源 

分 类 号：P631[天文地球—地质矿产勘探]