高温热田深部母地热流体的温度计算及其升流后经历的冷却过程: 以腾冲热海热田为例

李洁祥; 郭清海; 王焰新

doi:10.3799/dqkx.2015.142

Volume 40 Issue 9

Sep. 2015

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Article Navigation > Earth Science > 2015 > 40(9): 1576-1584

Li Jiexiang, Guo Qinghai, Wang Yanxin, 2015. Evaluation of Temperature of Parent Geothermal Fluid and Its Cooling Processes during Ascent to Surface: A Case Study in Rehai Geothermal Field, Tengchong. Earth Science, 40(9): 1576-1584. doi: 10.3799/dqkx.2015.142

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Li Jiexiang, Guo Qinghai, Wang Yanxin, 2015. Evaluation of Temperature of Parent Geothermal Fluid and Its Cooling Processes during Ascent to Surface: A Case Study in Rehai Geothermal Field, Tengchong. Earth Science, 40(9): 1576-1584. doi: 10.3799/dqkx.2015.142

Citation:

Li Jiexiang, Guo Qinghai, Wang Yanxin, 2015. Evaluation of Temperature of Parent Geothermal Fluid and Its Cooling Processes during Ascent to Surface: A Case Study in Rehai Geothermal Field, Tengchong. Earth Science, 40(9): 1576-1584. doi: 10.3799/dqkx.2015.142

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Evaluation of Temperature of Parent Geothermal Fluid and Its Cooling Processes during Ascent to Surface: A Case Study in Rehai Geothermal Field, Tengchong

doi: 10.3799/dqkx.2015.142

School of Environmental Studies, China University of Geosciences, Wuhan 430074, China

Received Date: 2015-03-28
Publish Date: 2015-09-15

Abstract

Abstract

High temperature geothermal system contains plenty of geothermal resources. In order to further understand the high temperature geothermal system, taking the Rehai geothermal field of Tengchong as a typical study area and the geochemical compositions of Rehai hot springs as basic data, the temperature of parent geothermal fluid (PGF) below Rehai is estimated by use of multiple geochemical models, based on which the cooling processes of PGF during its ascent to surface are analyzed as well. The geothermal waters discharged from both Liuhuangtang and Reshuitang of Rehai originate from the same deep reservoir where a parent geothermal fluid with Cl^- concentration of 265 mg/L and temperature of 336 ℃ was identified. The Dagunguo spring with the highest vent temperature at Rehai was formed via direct adiabatic cooling of PGF, whereas the other neutral springs are primarily the results of mixing between PGF and shallow cold groundwater, although boiling was also involved after the mixing. Above the deep reservoir containing PGF, there exist many geothermal reservoirs with temperatures higher than 200 ℃. The formation of these reservoirs is possibly controlled by the faults with different stretching directions at Rehai.
- parent geothermal fluid,
- adiabatic cooling,
- mixing,
- reservoir temperature,
- Rehai geothermal field,
- geothermal spring,
- geochemistry

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References(38)

References

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Evaluation of Temperature of Parent Geothermal Fluid and Its Cooling Processes during Ascent to Surface: A Case Study in Rehai Geothermal Field, Tengchong

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