Fault has an important influence on the storage and movement of geothermal water. The Zhangzhou Basin is wholly located in a granodiorite rock mass. Due to the low permeability of granodiorite, faulted structure has a...Fault has an important influence on the storage and movement of geothermal water. The Zhangzhou Basin is wholly located in a granodiorite rock mass. Due to the low permeability of granodiorite, faulted structure has an evident control action on the hydrothermal activity of geothermal fields. Hot springs in Zhangzhou Basin crack along Pingtan-Dongshan Fault to the northeastern direction and emerge along Fu'an-Nanjing Fault. Through measurement of the temperature of several hot springs in the Basin, we found the temperature along the northwestern direction of Zhangzhou-Tianbao Fault is high and the temperature gap between the two sides of Yangxi-Yuanshan Fault is huge; the estimation of geothermal reservoir temperature of geothermal water through quartz geothermometer indicates that the geothermal reservoir temperature of the northern area of Nanjing-Xiamen Fault is obviously higher than that of southern area. Such result indicates that Fault obviously obstructs underground heat source. Under the condition that the average geothermal gradient of the Zhangzhou Basin is set, the circulation depth of the geothermal water of the Zhangzhou Basin measured by geothermal reservoir temperature is 3 550-5 200 m and the circulation depth of the geothermal water of the north of Nanjing-Xiamen Fault is deeper than that of the South.展开更多
Carbon dioxide enhanced geothermal system（CO2-EGS） now is an emerging research field that is attracting an increasing research interest with broad application prospects based on its low-carbon, economical and renewa...Carbon dioxide enhanced geothermal system（CO2-EGS） now is an emerging research field that is attracting an increasing research interest with broad application prospects based on its low-carbon, economical and renewable features. The fluid flow and heat transfer is the core of CO2-EGS research. In this paper, further research focus is pointed out after summarizing the latest research progress in this field based on the explanation and the advantages of CO2-EGS development process in the hope of providing reference for researchers engaged in this field.展开更多
Geothermal with features of large reserves and non-pollution has been one of the most important energy. China has significant geothermal resources. There are rich hydrothermal resources in Xinji, which has been in dev...Geothermal with features of large reserves and non-pollution has been one of the most important energy. China has significant geothermal resources. There are rich hydrothermal resources in Xinji, which has been in development for 5 years. However, hot water continues to decrease because of extensive exploitation and utilization. We selected exploration area as study area, build a set of numerical models of Guantao formation on the basis of actual geological conditions. We get the distribution of hydraulic conductivity from 1.7 m/d to 1.9 m/d by parameter inversion using historical water level monitoring data, and simulation effect is good. We calculate the maximum permissible exploitation under the limitation of 200 m in depth in 50 years which is about 2.2 million m3/a. The results will provide theoretic support for plan making of geothermal exploitation.展开更多
Based on the geothermal geology of Shenze Geothermal Reservoir,several methods were adopted to evaluate the geothermal resources of the Minghuazhen Group and the Guantao Group of Shenze Geothermal Reservoir respective...Based on the geothermal geology of Shenze Geothermal Reservoir,several methods were adopted to evaluate the geothermal resources of the Minghuazhen Group and the Guantao Group of Shenze Geothermal Reservoir respectively. The results show that the geothermal reserve is 1 519.77×1016 J,among which the exploitable reserve of geothermal resources is 379.94×1016 J,the reserve of geothermal fluid is 35 908.46×106 m3,while the quantity of heat is 613.84×1016 J,the exploitable reserve of geothermal fluid is 3 026.54×106 m3 and the quantity of heat is 52.75×1016 J. The existing status and problem of geothermal resources utilization were analyzed and suggestions on reasonable utilization were put forward.展开更多
基金supported by Basal Science Research Fund from Institute of Hydrogeology and Environmental Geology(Grant No.SK201606 and SK201501)China Geological Survey Project(No.DD20160191 and DD20160190)
文摘Fault has an important influence on the storage and movement of geothermal water. The Zhangzhou Basin is wholly located in a granodiorite rock mass. Due to the low permeability of granodiorite, faulted structure has an evident control action on the hydrothermal activity of geothermal fields. Hot springs in Zhangzhou Basin crack along Pingtan-Dongshan Fault to the northeastern direction and emerge along Fu'an-Nanjing Fault. Through measurement of the temperature of several hot springs in the Basin, we found the temperature along the northwestern direction of Zhangzhou-Tianbao Fault is high and the temperature gap between the two sides of Yangxi-Yuanshan Fault is huge; the estimation of geothermal reservoir temperature of geothermal water through quartz geothermometer indicates that the geothermal reservoir temperature of the northern area of Nanjing-Xiamen Fault is obviously higher than that of southern area. Such result indicates that Fault obviously obstructs underground heat source. Under the condition that the average geothermal gradient of the Zhangzhou Basin is set, the circulation depth of the geothermal water of the Zhangzhou Basin measured by geothermal reservoir temperature is 3 550-5 200 m and the circulation depth of the geothermal water of the north of Nanjing-Xiamen Fault is deeper than that of the South.
文摘地下热储温度的确定,可为评价地热资源潜力提供重要参数.青海省恰卜恰地区地热资源丰富,但深部热储温度难以确定.利用青海省恰卜恰地区两个热水井,结合其水化学特征,采用多种方法估算深部热储温度.结果显示:二氧化硅温标指示性最强;PHREEQC软件对冷水混入和脱气作用进行了校正,使得计算结果相对准确可靠.经多种方法相互验证,最终确定恰卜恰地区新近系的热储温度在86~107℃,地温梯度大约为6℃/100 m.
基金supported by the project of Maps of Groundwater Resources and Environmental Geology of China and Surrounding Areas(12120113014200)Series Maps of Karst Environment Geology of China and South East Asia(12120114006401,12120114006301)
文摘Carbon dioxide enhanced geothermal system（CO2-EGS） now is an emerging research field that is attracting an increasing research interest with broad application prospects based on its low-carbon, economical and renewable features. The fluid flow and heat transfer is the core of CO2-EGS research. In this paper, further research focus is pointed out after summarizing the latest research progress in this field based on the explanation and the advantages of CO2-EGS development process in the hope of providing reference for researchers engaged in this field.
基金supported by thermal response test(TRT)and numerical modeling with vertical ground heat exchanger in media sand(41302189)the research on the behavior characteristic of As and REE in high temperature geothermal fluid(1415042249)geothermal survey of Xiamen-Qiongbei region in Southeast coastal(12120115045901)
文摘Geothermal with features of large reserves and non-pollution has been one of the most important energy. China has significant geothermal resources. There are rich hydrothermal resources in Xinji, which has been in development for 5 years. However, hot water continues to decrease because of extensive exploitation and utilization. We selected exploration area as study area, build a set of numerical models of Guantao formation on the basis of actual geological conditions. We get the distribution of hydraulic conductivity from 1.7 m/d to 1.9 m/d by parameter inversion using historical water level monitoring data, and simulation effect is good. We calculate the maximum permissible exploitation under the limitation of 200 m in depth in 50 years which is about 2.2 million m3/a. The results will provide theoretic support for plan making of geothermal exploitation.
文摘Based on the geothermal geology of Shenze Geothermal Reservoir,several methods were adopted to evaluate the geothermal resources of the Minghuazhen Group and the Guantao Group of Shenze Geothermal Reservoir respectively. The results show that the geothermal reserve is 1 519.77×1016 J,among which the exploitable reserve of geothermal resources is 379.94×1016 J,the reserve of geothermal fluid is 35 908.46×106 m3,while the quantity of heat is 613.84×1016 J,the exploitable reserve of geothermal fluid is 3 026.54×106 m3 and the quantity of heat is 52.75×1016 J. The existing status and problem of geothermal resources utilization were analyzed and suggestions on reasonable utilization were put forward.
