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Based on the project titled “Investigation and evaluation of shallow geothermal energy in major cities of Tibet Autonomous Region”, the distribution characteristics and occurrence conditions of shallow geothermal fields in these cities were introduced in this paper. To this end, relevant data in Lhasa, Shigatse and Nyingchi Cities through vertical thermometry was a focus, so as to analyze groundwater temperature and the distribution law of strata with constant temperature. Then through comprehensive comparisons and analysis of the relationship between groundwater temperature and climate, differences in this aspect of Nagqu City were taken as a typical case to clarify formation of geothermal field and corresponding influence on groundwater temperature, furthermore providing basic data for rational development and utilization of shallow geothermal energy in Tibet Autonomous Region. 相似文献
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藏北温泉盆地地热资源丰富，但研究程度较低。为查明温泉盆地地热资源赋存状态及热源来源，揭示热循环机理，定量评估研究区热储温度、冷水混入比例、热循环深度等，利用温泉盆地地热田共18组温泉水样进行水化学分析，进行定量计算。结果表明:温泉盆地温泉水水化学类型主要为Ca-HCO3?SO4型。温泉盆地地下热水在向上运移过程中，受浅层地下水的混合作用影响，使得热水变为“未成熟水”。温泉水中文石、方解石等钙质热液的饱和度指数大于0。热储温度60.93~96.52 ℃，热循环深度3 238.06~5 215.28 m，冷水混入比例在20.97%~70.19%之间。硅-焓模型计算出未混入冷水时深部热储温度在81.94~167.26 ℃之间，热储循环深度4 405.56~9 145.56 m。 相似文献
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浅层地温能作为可再生能源，已经引起广泛关注。为了有效地监测南京市浅层地温场的时空演化，针对4种温度传感器：DTS、FBG、Pt100和iButton，通过野外和室内试验进行分析对比，从测温精度、适用范围、工作特性等方面展开研究。结合试验结果和目前的实际应用情况，总结出四种传感器在浅层地温场监测方面的优缺点和特性，并制定出一套较为完善的监测方案，为浅层地温场的长期时空监测提供参考：在所有钻孔中埋设分布式测温光纤，并根据地温钻孔的土层分布和所获取的地温分布数据，选取两个较为典型的地温钻孔布设FBG测温串；在所有钻孔点距地表5 cm处布设iButton，并使用Pt100监测地表以下25 m内的精确地温。根据已获得的监测数据，可总结出南京地区浅层地温在垂向上的大体分布规律，发现其分布在空间上具有差异性，浅地表地温与地表覆盖层、大气及太阳辐射有关，深部地温受地质构造和水文地质条件等因素控制。 相似文献
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深入研究高寒地区建筑物供暖制冷需求及浅层地温能开发利用条件,可发挥浅层地温能在建筑能源供应中的最大效益; 探讨多种能源在供暖中的联合应用,能够更好地解决高寒地区能源紧缺问题。通过对高原气候特点分析,浅层地温能开发利用条件的调查、勘探、评价及多种能源联用的研究认为: 高寒地区对浅层地温能需求主要为冬季供暖和生活热水供应,且热量需求大; 高寒地区浅层地温能资源品位低,主要体现为换热温差小; 换热方式以地下水水源热泵最为经济实用; 城市中可供开发利用的空间小。鉴于当地深部地热、太阳能资源丰富,可充分利用这些可再生能源及常规能源,尽可能采用“基础负荷+调峰负荷”的方式,解决热量需求大的问题,从而提高能源的利用效率。 相似文献
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地下水循环对围岩温度场的影响及地热资源形成分析——以平顶山矿区为例 总被引：8，自引：1，他引：7
地下水循环方式的不同对围岩温度场产生的影响有很大差异。当低温地下水向下运动时 ,将引起围岩温度降低 ,出现低温异常 ,从而阻碍地热资源的形成 ;当深循环的地下水在循环过程中被岩温加热 ,并在一定地质条件下向上循环时 ,将引起流经围岩的局部温度升高 ,在浅部形成局部地热异常 ,进而促进地热资源的形成。因此 ,地下水循环对围岩温度场的影响在一定程度上决定着地热资源的形成。本文在研究地下水循环对围岩温度场的影响基础上 ,利用地球化学地热温标和同位素方法对平顶山矿区地热资源的形成进行了分析 ,预测了该区地温场温度 相似文献
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具有无污染、可再生、分布广、能量大以及可就近利用等诸多优势的浅层地温能是一种建筑节能的洁净能源,具有广泛的应用前景。根据关中盆地主要城市工程地质、水文地质、环境地质条件等因素,分别建立了每个城市地下水热泵和地埋管热泵系统的适宜分区评价体系,并进行了适宜性综合分区。基于适宜性分区评价结果,对主要城市进行了浅层地热能资源量评价,包括热容量计算、换热功率计算和热能潜力计算,旨在有效地丰富浅层地温能勘察评价与开发利用的理论、奠定浅层地温能广泛开发利用的基础,为改善我国现有能源结构、构建环境友好型社会和节能减排的目标服务。 相似文献
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In this paper,through data collection and field investigation,the development and utilization status of shallow geothermal energy in Zhoukou urban area was discussed.Based on the analysis of hydrogeological conditions,rock and soil structure characteristics and field test research,the spatial distribution characteristics of rock and soil in the study area were summarized.The study shows that Zhoukou City is located in the alluvial plain of Huanghuai,and the loose deposits of river alluvial genesis range 0-200 m.These loose deposits and groundwater stored in their pores are the main carriers of shallow geothermal energy.In the central part of the Yinghe River in the middle of the study area,the aquifer thickness is within 200 m,the particle size is coarser,the water-bearing degree and recharge capacity is better.On this basis,the paper uses AHP to evaluate the suitability of shallow geothermal energy development and utilization to guide the rational development and utilization of shallow geothermal energy resources. 相似文献
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In this paper, through data collection and field investigation, the development and utilization status of shallow geothermal energy in Zhoukou urban area was discussed. Based on the analysis of hydrogeological conditions, rock and soil structure characteristics and field test research, the spatial distribution characteristics of rock and soil in the study area were summarized. The study shows that Zhoukou City is located in the alluvial plain of Huanghuai, and the loose deposits of river alluvial genesis range 0-200 m. These loose deposits and groundwater stored in their pores are the main carriers of shallow geothermal energy. In the central part of the Yinghe River in the middle of the study area, the aquifer thickness is within 200 m, the particle size is coarser, the water-bearing degree and recharge capacity is better. On this basis, the paper uses AHP to evaluate the suitability of shallow geothermal energy development and utilization to guide the rational development and utilization of shallow geothermal energy resources. 相似文献
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本文就浅层地热能开发利用过程中出现的生态环境和地质环境问题从客观因素和人为因素进行了详细的研究,借助土壤温度的测试和地层冷热平衡的监测,分析在地源热泵运行过程中造成的热污染、地下水位下降、地面沉降、地下水质恶化污染等问题。研究认为长期利用地源热泵开发利用系统,如设计不合理或地下水回灌率低,将破坏地层的冷热平衡。北方地区供暖期大于制冷期时,地层温度将逐年下降,N2O和CH4会集中释放,造成生物生长速度缓慢。地下水源热泵运行时,如地下水回灌困难,将导致地下水资源浪费、水位下降等生态环境问题以及路面塌陷、地面沉降等地质环境问题。供暖期、制冷期运行时间差别较大时,将导致地下水温度的变化,直接影响地下水中污染物的降解,间接影响地下水的水质。抽取、回灌地下水的过程会造成空气中的氧气随之溶解于水中,导致地下水质的变化。通过分析浅层地热能开发利用存在的突出问题和影响因素,可为其科学合理开发利用提供科学依据和技术支撑。 相似文献
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以两期Landsat7 ETM＋为基本数据源,采用单窗算法对天津滨海新区地表温度进行了反演,得到区域地表温度场的分布规律。发现地表温度变化与浅层地温能的分布有较好的对应关系,可以利用热红外遥感技术探测浅层地温能。 相似文献
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浅层地热能作为新型能源受到了国际国内的广泛关注,常规的电阻式温度传感器受电磁干扰,不适合长期在野外复杂环境中使用。本文应用抗干扰能力强的分布式光纤测温技术,对南京市19个百米深钻孔进行地温测量,获得了2018年冬季与2019年春季南京市浅层地下温度分布。综合南京市水文和地质条件,得出结论:浅层地温的变化相对于气温的变化存在着滞后现象;对于同一地点的浅层地温,地下水的流动会使得地温在不同季节出现差异;构造条件显著影响着南京市浅层地温分布。本项研究结果为南京市浅层地热能的利用分区与进一步开发提供参考。 相似文献
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O,H, and Sr isotope evidences of mixing processes in two geothermal fluid reservoirs at Yangbajing,Tibet, China 总被引：1，自引：1，他引：0
The Yangbajing geothermal field with the highest reservoir temperature among Chinese hydrothermal systems is located about
90 km northwest to Lhasa City, capital of Tibet, where high temperature geothermal fluids occur in two reservoirs: a shallow
one at a depth of 180–280 m and a deep one at 950–1,850 m. In this study, Oxygen-18 and deuterium isotope compositions as
well as 87Sr/86Sr ratios of water samples collected from geothermal wells, cold springs and surface water bodies were characterized to understand
the genesis of geothermal fluids at Yangbajing. The results show that the deep geothermal fluid is the mixing product of both
magmatic and infiltrating snow-melt water, whereas the shallow geothermal fluid is formed by the mixing of deep geothermal
fluid with cold groundwater. Using a binary mixing model with deep geothermal fluid and cold groundwater as two endmembers,
the mixing ratios of the latter in most shallow geothermal water samples were calculated to be between 40 and 50%. The combined
use of O, H, and Sr isotopes proves to be an effective approach to depict the major sources of geothermal fluids and the mixing
processes occurring in two reservoirs at Yangbajing. 相似文献
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东北地区水文地质环境地质调查未来工作方向探讨 总被引：1，自引：0，他引：1
东北地区资源丰富,在为国家经济建设做出贡献的同时,自身地质环境也在不断变化.在简述东北地区区域水文、环境地质条件等自然地理概况的基础上,讨论了存在的水文地质、环境地质问题.认为未来在东北地区应加强战略性地下水资源的调查评价工作,提高全区研究程度,加强低山丘陵区地下水资源及其环境地质调查评价,在东北西部严重缺水的干旱-半干旱地区开展以解决生活用水、经济建设用水和生态环境建设用水的地下水勘查工作,加强东北中新生代盆地地热资源勘察工作,对地下水动态监测网格应加以补充、完善,加强城市地质调查工作,加强矿山环境地质工作,开展区域地质环境条件调查,建立地质环境监测工作的预报、预警系统. 相似文献
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In the recent decade, the construction projects related to shallow geothermal energy engineering have undergone rapid development in Shandong Province. The predominant type of these developments and applications was heat exchange through buried tubes and the main targets were residential and office buildings. However, an overwhelming majority of the completed geothermal heat pump projects lacked monitoring devices so that they were unable to comprehensively reflect the background values for the geothermal fields within the province and few researches were conducted on their influence on the geological environment. In this paper, locations for monitoring shallow geothermal energy and their validity of the monitoring point deployment were studied in view of the development and application status as well as geological background conditions of various projects located in multiple cities providing data support for analyzing the fluctuation trend and influence of large-scale shallow geothermal energy applications on the shallow geothermal and the feasibility and parameter designs of newly built systems in Shandong Province in the future. 相似文献
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基于黔西补作勘查区32口钻孔的简易测温资料,分析了勘查区浅部地温场的基本特征。研究发现,区内地温梯度在0.98～3.25℃/100m,平均2.07℃/100m,总体上属于正常地温场范畴;平面上变化较大,局部存在低温异常,在垂向上随着孔底深度增大,各钻孔地温梯度总体上趋于增高,但与埋深之间关系相对离散,钻孔温度曲线表现为两种基本形式。研究认为,断层构造控制了地温场的分布,地温异常带的展布方向反映区域构造的基本轮廓;地下水动力场微弱,对地温场影响不甚明显;地层岩性及埋深影响地温场的垂向分布。 相似文献
17.
Reconstruction of deep fluid chemical constituents for estimation of geothermal reservoir temperature using chemical geothermometers 
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下载免费PDF全文 This paper elaborates the chemical constituent change principles of deep geothermal fluid during the process of upward movement. It summarizes research methods of hydrochemistry, isotope and numerical modelling technique for the physiochemical processes such as decreasing temperature, shallow groundwater infusion, and degassing. The multi-component chemical geothermometry methods including gas geochemical method are discussed. High-temperature geothermal fields in China are mostly located in the southwest with frequent new tectonic movements, especially in Tibet high-temperature geothermal areas. Therefore the paper also focuses the status of high-temperature geothermal fluid research. At last, it’s pointed out in the paper that in the future we can start from typical high-temperature geothermal zones and geothermal fields to explore optimization of the multi-component geothermometry method and use it in the reconstruction and analogue of the formation mechanism and internal relevancy of regional geothermal systems. 相似文献
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天津是中国浅层地热能开发利用试点城市之一,目前已顺利完成试点工作,形成了"调查先行、规划跟进、工程示范、监测到位、政策保障"的"天津模式",动态监测作为其中一项重要的工作,取得了丰硕的成果。首先,结合天津浅层地热能地质条件和开发利用现状,制定了动态监测网的原则和技术要求;建设了地层温度监测站、运行系统监测站及两者皆有的监测站共11个,同时建立了天津浅层地热能开发利用试验基地及动态监测中心,采用GPRS网络实现了监测数据的无线传输;产学研相结合,研制了"分布串列式地层精细温度测量和传输采集系统"等监测设备、仪器及软件,共申报国家专利14项;在总结和分析建设经验的基础上,起草了《天津市地埋管地源热泵动态监测规程》。笔者认为,天津的工作成果,必将为其他省市开展浅层地热能工作提供宝贵的经验。 相似文献
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《地学前缘(英文版)》2020,11(4):1175-1187
Tho Gudui geothermal field records the highest temperature at equivalent borehole depths among the lainland hydrothermal systems in mainland China.Located about 150 km southeast of Lhasa City,the capital of Tibet,the Gudui geothermal field belongs to the Sangri-Cuona rift belt,also known as the Sangri-Cuona geothermal belt,and is representative of the non-volcanic geothermal systems in the Himalayas.In this study,oxygen-18 and deuterium isotope compositions as well as ~(87)Sr/~(86)Sr ratios of water samples collected from the Gudui geothermal field were characterized to understand the origin and mixing processes of the geothermal fluids at Gudui.Hydrogen and oxygen isotope plots show both,deep and shallow reservoirs in the Gudui geothermal field.Deep geothermal fluids are the mixing product of magmatic and infiltrating snow-melt water.Calculations show that the magma fluid component of the deep geothermal fluids account for about 21.10%-24.04%;magma fluids lay also be a contributing source of lithium.The linear relationship of the ~(87)Sr/~(86)Sr isotopic ratio versus the 1/Sr plot indicates that shallow geothermal fluids form from the mixing of deep geothermal fluids with cold groundwater.Using a binary mixing model with deep geothermal fluid and cold groundwater as two end-members,the nixing ratios of the latter in most surface hot springs samples were calculated to be between 5% and 10%.Combined with basic geological characteristics,hydrogen and oxygen isotope characteristics,strontium concentration,~(87)Sr/(86)Sr ratios,and the binary mixing model,we infer the 6 th-Class Reservoirs Evolution Conceptual Model(6-CRECM) for the Gudui geothermal system.This model represents an idealized summary of the characteristics of the Gudui geothermal field based on our comprehensive understanding of the origin and mixing processes of the geothermal fluid in Gudui.This study may aid in identifying the geothermal and geochemical origin of the Gudui high-temperature hydrothermal systems in remote Tibet of China,whose potential for geothermal development and utilization is enormous and untapped. 相似文献