A study of the characteristics of geothermal reservoir and genesis of thermal groundwater in the Tongluoshan anticline near Guang'an in east Sichuan
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摘要: 岩溶热储赋存丰富的中-低温地热水，是广安市地热资源勘探和开发的主要目的层。通过地热地质、地球物理、地球化学和环境同位素等方法和手段对广安地区铜锣山背斜热储性质及成因模式进行了探讨。研究结果表明：①区内地温梯度值每百米为1.8～2.0℃，水温为26～42℃，水化学类型为SO4—Ca·Mg型，属于低温中性热矿水。②氢氧同位素显示地热水的主要补给来源为大气降水，补给高程超过1 100 m，位于区域北部的大巴山一带，具有较远的补给来源及较长的径流途径。③音频大地电磁测深解译成果和2 503 m地热钻井测温曲线揭示，牟家镇刘家沟村地下800～1 100 m存在低阻层和温度拐点，推测为导水断裂带。基于地热钻探认识、物探解译成果、水文地球化学和同位素分析结果，概化其地热成因模式为：大气降水在高隆起背斜槽谷区渗入地下，沿溶隙、管道和构造通道自北向南形成深部径流，吸收岩石热量后成为热水，并于河流深切峡谷地段以天然温泉出露或以地热井形式被人工揭露。此项研究可为广安市地热勘探、开发和利用提供科学依据。Abstract: Abundant geothermal water of low-medium temperature occurs in the karstic geothermal reservoirs, which are the major target strata for the exploration and exploitation of geothermal resources in the city of Guang'an. In this paper, methods and means of geothermal geology, geophysics, geochemistry and environmental isotopes are used and the characteristics and genesis of the geothermal reservoirs in the Tongluoshan anticline are discussed. The comparative studies of regional geology, geological structure and geothermal wells suggests that (1) the regional geothermal gradients, water temperatures, and hydrochemical type are 18~20℃/km, 26~42℃ and SO4-Ca·Mg type, suggesting a neutral and low-temperature thermal mineral water. (2) The thermal groundwater is of meteoric origin, and the recharge area is located in the Daba Mountain area to the north with an elevation of more than 1 100 m, indicating a deep groundwater circulation and a long flow path indicated by oxygen and hydrogen isotopes. (3) Results of the audio frequency magnetotelluric method and measured temperature curve of a geothermal well drilled to a depth of 2 503 m suggest a water conducted zone at depth of 800~1 100 m, since there is an area with low resistance belt and remarkable inflexion. Based on the results of geothermal drilling, the audio frequency magnetotelluric method, hydrogeochemistry and environmental isotopes, the genetic model of thermal groundwater in the Tongluoshan anticline are summarized. Groundwater receives recharge from precipitation in valley areas of the high-ridge anticline, flows from north to south through dissolved-fissure, karst conduit, and structural channels. Thermal groundwater receives heat from heat flow and discharges naturally in the deep section of the canyon and/or tapped artificially by geothermal wells. This study may provide a scientific basis for geothermal exploration, development and utilization for the local government in the city of Guang'an.
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Key words:
- Tongluoshan anticline /
- geothermal reservoir /
- genetic model /
- geothermal resources /
- Guang'an city
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[1] 汪集旸. 能源环境危机下的地热能开发[J]. 科技导报, 2012, 30(4):3.[WANG J Y. Geothermal energy development under energy and environment crisis[J]. Science & Technology Review, 2012, 30(4):3.(in Chinese)]
[2] 汪集旸. 地热学及其应用[M]. 北京:科学出版社, 2015.[WANG J Y. Geothermal Science and its Application[M]. Beijing:Science Press,2015.(in Chinese)]
[3] 庞忠和, 孔彦龙, 庞菊梅, 等. 雄安新区地热资源与开发利用研究[J]. 中国科学院院刊, 2017, 32(11):1224-1230.[PANG Z H, KONG Y L, PANG J M, et al. Geothermal resources and development in Xiongan new area[J]. Bulletin of Chinese Academy of Sciences, 2017, 32(11):1224-1230.(in Chinese)]
[4] 陈墨香, 汪集旸. 中国地热研究的回顾和展望[J]. 地球物理学报, 1994, 37(增刊1):320-338.[CHEN M X, WANG J Y. Review and prospect on geothermal studies in China[J]. Chinese Journal of Geophysics, 1994, 37(Sup1):320-338.(in Chinese)]
[5] 陈墨香. 中国地热资源分布及其开发利用[J]. 自然资源, 1991, 13(5):40-46.[CHEN M X. Distribution and development of geothermal resources in China[J]. Nature Resources, 1991, 13(5):40-46. (in Chinese)]
[6] 庞忠和, 胡圣标, 汪集旸. 中国地热能发展路线图[J]. 科技导报, 2012, 30(32):18-24.[PANG Z H, HU S B, WANG J Y. A roadmap to geothermal energy development in China[J]. Science & Technology Review, 2012, 30(32):18-24.(in Chinese)]
[7] 程群, 杨华林, 曾敏. 重庆市主城区岩溶地热水资源的形成与保护[J]. 中国岩溶, 2015, 34(3):217-227.[CHENG Q, YANG H L, ZENG M. The formation and protection of karst geothermal water resources in the main urban area of Chongqing[J]. Carsologica Sinica, 2015, 34(3):217-227.(in Chinese)]
[8] SHI H C, SHI X B, GLASMACHER U A, et al. The evolution of eastern Sichuan basin, Yangtze block since Cretaceous:Constraints from low temperature thermochronology[J]. Journal of Asian Earth Sciences, 2016, 116:208-221.
[9] 杨华云, 徐静.重庆都市圈地热资源评价与开发利用方向[J].中国水运:学术版, 2006, 6(8):217-218.[YANG H Y,XU J.The geothermal resources evaluation and of Chongqing metropolitan area[J].China Water Transport:Academic Version, 2006, 6(8):217-218.(in Chinese)]
[10] 罗祥康. 重庆市渝北区统景风景旅游区温泉的形成及其特征[J]. 中国岩溶, 2000, 19(2):159-163.[LUO X K. Formation and characteristics of the geothermal spring in Tongjing scenic spot, north Chongqing district, Chongqing City[J]. Carsologica Sinica, 2000, 19(2):159-163.(in Chinese)]
[11] 曾敏. 重庆温泉分布于成因研究[D]. 成都:成都理工大学, 2012.[ZENG M. Study on the distribution and origin of hot springs in Chongqing[D]. Chengdu:Chengdu University of Technology, 2012. (in Chinese)]
[12] 漆继红, 许模, 杨华云, 等. 川东铜锣山背斜-南温泉背斜温泉水力联系分析[J]. 人民长江, 2011,42(11):5-9.[QI J H, XU M, YANG H Y, et al. Analysis on hydraulic connection of hot springs of Tongluo Mountain anticline to south hot spring anticline in eastern Sichuan Province[J]. Yangtze River, 2011, 42(11):5-9. (in Chinese)]
[13] 李东升, 刘东升. 重庆地热水资源热储构造与径流补给[J]. 河海大学学报(自然科学版), 2011, 39(4):372-376.[LI D S, LIU D S. Geothermal reservoir structure and runoff flow recharge of geothermal water resources in Chongqing City[J]. Journal of Hohai University (Natural Sciences), 2011, 39(4):372-376.(in Chinese)]
[14] 罗云菊, 刘东燕, 许模. 重庆地下热水径流特征研究[J]. 地球与环境, 2006, 34(1):49-54.[LUO Y J, LIU D Y, XU M. Study on the geothermal water runoff in Chongqing[J]. Earth and Environment, 2006, 34(1):49-54.(in Chinese)]
[15] 郭彤, 刘之葵, 陈成. 重庆市铜锣峡背斜地热水资源的形成与水力联系分析[J]. 桂林理工大学学报, 2018, 38(1):61-68.[GUO T, LIU Z K, CHEN C. Analysis on hydraulic connection and formation of geothermal water resources in Tongluo mountain anticline, Chongqing[J]. Journal of Guilin University of Technology, 2018, 38(1):61-68.(in Chinese)]
[16] 罗云菊, 刘东燕, 刘新荣. 重庆南温泉背斜地下热水系统的探讨[J]. 重庆大学学报(自然科学版), 2006, 29(3):131-133.[LUO Y J, LIU D Y, LIU X R. System of the geothermal water in the Nanwenquan anticline[J]. Journal of Chongqing University (Natural Science Edition), 2006, 29(3):131-133.(in Chinese)]
[17] 拓明明, 周训, 郭娟, 等. 重庆温泉及地下热水的分布及成因[J]. 水文地质工程地质, 2018, 45(1):165-172.[TA M M, ZHOU X, GUO J, et al. Occurrence and formation of the hot springs and thermal groundwater in Chongqing[J]. Hydrogeology & Engineering Geology, 2018, 45(1):165-172.(in Chinese)]
[18] YANG P H, CHENG Q, XIE S Y, et al. Hydrogeochemistry and geothermometry of deep thermal water in the carbonate formation in the main urban area of Chongqing, China[J]. Journal of Hydrology, 2017, 549:50-61.
[19] 肖琼. 重庆三叠系碳酸盐热储成因与水-岩作用过程研究[D]. 重庆:西南大学, 2012.[XIAO Q. Water-rock interaction and genesis of thermal groundwater in carbonate reservoir in Chongqing[D]. Chongqing:Southwest University, 2012.(in Chinese)]
[20] 杨雷. 重庆市温塘峡背斜地下热水水文地球化学特征研究[D]:重庆:西南大学, 2012.[YANG L. Hydrogeochemical characteristics of geothermal water in Wentangxia anticline, Chongqing[D]. Chongqing:Southwest University, 2012.(in Chinese)]
[21] 舒泽宣. 重庆西部地区地下热水分布规律及水化学特征[J]. 地下空间与工程学报, 2013, 9(2):462-468.[SHU Z X. Distribution law and the feature of water chemistry of geothermal water in western area of Chongqing[J]. Chinese Journal of Underground Space and Engineering, 2013, 9(2):462-468(in Chinese).]
[22] 马瑞. 碳酸盐热储隐伏型中低温热水的成因与水-岩相互通研究:以山西太原为例[D].武汉:中国地质大学, 2007.[MA R. Water-rock interaction and genesis lf low-medium temperature thermal groundwater in carbonate reservoir:A case study at Taiyuan, Shanxi[D]. Wuhan:China University of Geosciences, 2007. (in Chinese)]
[23] YANG P H, YUAN D X, YE X C, et al. Sources and migration path of chemical compositions in a karst groundwater system during rainfall events[J]. Chinese Science Bulletin, 2013, 58(20):2488-2496.
[24] 黄力军, 孟银生, 陆桂福. 可控源音频大地电磁测深在深部地热资源勘查中的应用[J]. 物探化探计算技术, 2007, 29(增刊1):60-63.[HUANG L J, MENG Y S, LU G F. An application of CSAMT sounding to exploration of deep geothermal resources[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2007, 29(Sup1):60-63.(in Chinese)]
[25] 袁建飞, 邓国仕, 徐芬, 等. 毕节市北部岩溶地下水水文地球化学特征[J]. 水文地质工程地质, 2016, 43(1):12-21.[YUAN J F, DENG G S, XU F, et al. Hydrogeochemical characteristics of karst groundwater in the northern part of the City of Bijie[J]. Hydrogeology & Engineering Geology, 2016, 43(1):12-21.(in Chinese)]
[26] 赵振, 于漂罗, 陈惠娟, 等. 青海省西宁地热田成因分析及资源评价[J]. 中国地质, 2015, 42(3):803-810.[ZHAO Z, YU P L, CHEN H J, et al. Genetic analysis and resource evaluation of the Xining geothermal field in Qinghai Province[J]. Geology in China, 2015, 42(3):803-810.(in Chinese)]
[27] 袁建飞, 邓国仕, 徐芬, 等. 川西南喜德热田地下水水文地球化学特征[J]. 现代地质, 2017, 31(1):200-208.[YUAN J F, DENG G S, XU F, et al. Hydrogeochemical characteristics of groundwater in the Xide geothermal field, southwest Sichuan, China[J]. Geoscience, 2017, 31(1):200-208.(in Chinese)]
[28] 邹鹏飞, 邱杨, 王彩会. 南京汤山温泉区地热水成因模式分析[J]. 高校地质学报, 2015, 21(1):155-162.[ZOU P F, QIU Y, WANG C H. Analyses of the genesis of Tangshan hot spring area in Nanjing[J]. Geological Journal of China Universities, 2015, 21(1):155-162.(in Chinese)]
[29] WANG S F, PANG Z H, LIU J R, et al. Origin and evolution characteristics of geothermal water in the Niutuozhen geothermal field, North China Plain[J]. Journal of Earth Science, 2013, 24(6):891-902.
[30] ZIJL W. Scale aspects of groundwater flow and transport systems[J]. Hydrogeology Journal, 1999, 7(1):139-150.
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