康定-老榆林地热系统氢氧同位素迁移数值模拟分析

那金; 姜雪; 姜振蛟

doi:10.3799/dqkx.2020.249

Volume 46 Issue 7

Jul. 2021

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Article Navigation > Earth Science > 2021 > 46(7): 2646-2656

Na Jin, Jiang Xue, Jiang Zhenjiao, 2021. Numerical Modelling of Stable Isotope Transport Processes in a Hydrogeothermal System of Kangding-Laoyuling Area. Earth Science, 46(7): 2646-2656. doi: 10.3799/dqkx.2020.249

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Na Jin, Jiang Xue, Jiang Zhenjiao, 2021. Numerical Modelling of Stable Isotope Transport Processes in a Hydrogeothermal System of Kangding-Laoyuling Area. Earth Science, 46(7): 2646-2656. doi: 10.3799/dqkx.2020.249

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Numerical Modelling of Stable Isotope Transport Processes in a Hydrogeothermal System of Kangding-Laoyuling Area

doi: 10.3799/dqkx.2020.249

Na Jin^{1
,
,},
Jiang Xue²,
Jiang Zhenjiao^{3
,
,}

1.
College of Resources and Environment, Yangtze University, Wuhan 430100, China
2.
School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
3.
Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China

Received Date: 2020-08-21
Publish Date: 2021-07-15

Abstract

Abstract

In Laoyulin geothermal system of Kangding, we uses TOUGH-Isotope program to conduct the numerical simulation of water-heat-isotope coupling. In view of the obvious seasonality of stable isotopes in precipitation and active seismic activity in the research area, the impact that the isotope characteristics of recharge water and thermal reservoir permeability variation on the transport of hydrogen and oxygen isotopes in the geothermal system also are explored in this paper. The results indicate that the calculate values of hydrogen and oxygen isotopes of the hot water are generally with the measured values in ZK3 borehole, and the convection-dispersion effect of the high-temperature geothermal system has a significant effect on the migration process of hydrogen and oxygen isotopes. The geothermal water circulation conditions in the study area are strong, which causes the phenomenon of oxygen isotope enrichment to be slight. In the geothermal water circulation, the two factors-isotope characteristics of recharge water and thermal reservoir permeability have significant effects on the distribution of hydrogen and oxygen isotopes. Therefore, the numerical modelling of stable isotope transport processes in the geothermal system fluid can help to improve the quantitative understanding of the dynamic evolution of the geothermal system, which will provide support for geothermal development.
- geothermal system,
- the coupled fluid-heat-isotope model,
- isotopic characteristic,
- Kangding area,
- geochemistry

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References(43)

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Numerical Modelling of Stable Isotope Transport Processes in a Hydrogeothermal System of Kangding-Laoyuling Area

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