Research on exploration methods of concealed convective geothermal resources: A case study of Huating Lake scenic spot
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摘要: 隐伏地热资源勘查一直是地热勘查的难点。为提高隐伏对流型地热资源勘查的“选区定位”精度,以安徽省太湖县花亭湖风景区为研究区,在充分了解地热田形成条件和主要特征的基础上,采用遥感解译、地热地质调查、可控源音频大地电磁测量和水化学分析等技术手段先后确定了重点区、地热靶区和验证孔位,最终发现水温为22 ℃,涌水量为780.4 m3/d(降深S=20.62 m)的地下水资源,地下水化学特征与地热流体非常接近,含水段与可控源音频大地电磁测量(CSAMT)推断含水构造位置吻合; 在此基础上,总结了研究区隐伏地热资源“选区定位”的工作流程,分析了勘查方法的应用效果,认为可控源音频大地电磁测量能够有效识别含水构造,系统的水化学分析是寻找地热资源线索的有效方法,寻找隐伏地热资源的关键是对控制地热形成的断裂体系的识别。Abstract: Exploration of concealed convective geothermal resources has always been a tricky issue in geothermal survey. In order to improve exploration precision of position selection in concealed convective geothermal resources, the authors in this research have taken Huating Lake scenic spot in Taihu County of Anhui Province as an example to determinate key areas, target areas and boring location through remote sensing interpretation, geothermal geological survey, CSAMT and hydrochemical analysis, based on the forming conditions and main features of regional geothermal fields. The groundwater with 22 ℃ and 780.4m3/d outflow(drawdown, S=20.62 m) was discovered, and its hydrochemical characteristics are similar to the geothermal fluid, with the consistent water-bearing structural location between actual aquifer and deduced aquifer by CSAMT. The exploration workflow for concealed convective geothermal resources exploration is summarized and the application effect of the exploration method is analyzed based on above research. The researchers in this paper conclude that water-bearing structure can be effectively identified by the CSAMT, and the effective way to determine geothermal resources is systematical hydrochemical analysis. Besides, it is essential to analyze and identify structure system of geothermal resources during exploration.
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Key words:
- Dabie Mountains /
- concealed geothermal resources /
- exploration methods
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[1] 崔煜烽,张杰,殷焘,等.鲁东地区地热资源分布规律及勘查定井方法探讨[J].中国地质调查,2018,5(2):86-92.
[2] Cui Y F,Zhang J,Yin T,et al.Discussion on distribution of geothermal resources and locating wells methods of geothermal exploration in Eastern Shandong province[J].Geol Surv China,2018,5(2):86-92.
[2] 李强,肖友发,徐璇,等.氡气测量在嘉鱼县地热资源勘查中的应用[J].资源环境与工程,2019,33(4):541-546.
[4] Li Q,Xiao Y F,Xu X,et al.Application of radon measurement in geothermal resources exploration of Jiayu county[J].Resour Environ Eng,2019,33(4):541-546.
[3] 刁天仁,杜霏.综合物探方法在安徽省岳西县溪沸地热勘探中的应用[J].工程地球物理学报,2019,16(6):815-821.
[6] Diao T R,Du F.Application of integrated geophysical exploration method to Xifei geothermal exploration in Yuexi county of Anhui Province[J].Chin J Eng Geophys,2019,16(6):815-821.
[4] 何帅,张德全,张德实,等.音频大地电磁法对隐伏储热构造的识别与应用————以贵州省石阡县地热靶区勘查为例[J].工程地球物理学报,2018,15(2):153-158.
[8] He S,Zhang D Q,Zhang D S,et al.The application of AMT to concealed reservoir structure:Taken the geothermal exploration area of Shiqian country in Guizhou province as an example[J].Chin J Eng Geophys,2018,15(2):153-158.
[5] 陈学锋,魏永霞,李永军.皖江经济带地热资源调查与开发利用[J].中国地质调查,2018,5(2):57-63.
[10] Chen X F,Wei Y X,Li Y J.Survey and utilization of geothermal resources in Wanjiang Economic Belt[J].Geol Surv China,2018,5(2):57-63.
[6] 吴海权,杨则东,疏浅,等.安徽省地热资源分布特征及开发利用建议[J].地质学刊,2016,40(1):171-177.
[12] Wu H Q,Yang Z D,Shu Q,et al.Distribution characteristics of geothermal resources in Anhui Province and their development and utilization suggestions[J].J Geol,2016,40(1):171-177.
[7] 中国地质科学院水文地质环境地质研究所.东部地区地热资源调查与区划成果报告[R].南昌,2009:64-66.
[14] Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences.Report on the Results of Geothermal Resources Survey and Zoning in the Eastern Region[R].Nanchang,2009:64-66.
[8] 安徽省地质勘查局第二水文工程地质勘查院.安徽省地热资源调查与远景区划报告[R].安庆,2008:58-68.
[16] The Second Hydrological Geological Prospecting Institute,Bureau of Geology and Mineral Exploration of Anhui Province.Anhui Province Geothermal Resources Survey and Prospective area Planning Report[R].2008:58-68.
[9] 安徽省地质矿产局.店前河幅、牛凸岭幅1:50 000区域地质调查报告[R].1996:102-119.
[18] Bureau of Geology and Mineral Exploration of Anhui Province.1:50 000 Regional Geological Survey Report of the Dianqianhe Map Sheet and Niutuling Map Sheet[R].1996:102-119.
[10] 安徽省地质局第二水文地质工程地质队.太湖县H-50-15 1:20万区域水文地质普查报告[R].安庆,1981:123-130.
[20] The Second Hydrological Geological Prospecting Institute,Bureau of Geology and Mineral Exploration of Anhui Province.Regional Hydrogeological Survey Report of 1:200 000 in Taihu Map Sheet[R].Anqing,1981:123-130.
[11] 安徽省地质局311地质队.安徽省太湖县汤水湾地热区地下热水普查评价报告[R].安庆,1988:35-77.
[22] No.311 Team,Bureau of Geology and Mineral Exploration of Anhui Province.General Survey Evaluation Report of Underground Hot Water in Tangshuiwan Geothermal Area,Taihu County,Anhui Province[R].Anqing,1988:35-77.
[12] 岳西县土地收购储备中心.安徽省岳西县汤池畈地下热水可行性勘查报告[R].2012:17-35.
[24] Yuexi County Land Acquisition and Reserve Center.Feasibility Investigation Report of Tangchifan Underground Hot Water in Yuexi County,Anhui Province[R].2012:17-35.
[13] 安徽地矿局第二水文工程地质队.岳西幅H-50-9 1:20万区域水文地质普查报告[R].安庆,1990:73-94.
[26] The Second Hydrological Geological Prospecting Institute,Bureau of Geology and Mineral Exploration of Anhui Province.The Hydrogeological Survey Report on the 1:200 000 Region of Yuexi Map Sheet[R].Anqing,1990:73-94.
[14] 潘国林. 安徽省地热资源特征及远景区划[J].中国地质灾害与防治学报,2011,22(2):130-134.
[28] Pan G L.Characteristics of geothermal resources and the division of prospecting areas in Anhui province[J].Chin J Geol Hazard Control,2011,22(2):130-134.
[15] 黄力军,陆桂福,刘瑞德.可控源音频大地电磁测深法应用实例[J].物探化探计算技术,2006,28(4):337-341.
[30] Huang L J,Lu G F,Liu R D.Controlled soure audio-frequency magnetotellurics[J].Comput Tech Geophys Geochem Explor,2006,28(4):337-341.
[16] 彭吟雪. 安徽省地下热水水化学和环境同位素特征及成因研究[D].合肥:合肥工业大学,2016:34-40.
[32] Peng Y X.The Study of Hydrochemistry,Environmental Isotope and Origin of Geothermal Water in Anhui Province[D].Hefei:Hefei University of Technology,2016:34-40.
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