Geothermal driving force: A new additional non-gravity action driving the migration of geothermal water in the Xinzhou geothermal field of Yangjiang, Guangdong

Mao Xumei; Ye Jianqiao; Dong Yaqun; Shi Zide

doi:10.19509/j.cnki.dzkq.2022.0014

Volume 41 Issue 1

Jan. 2022

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Mao Xumei, Ye Jianqiao, Dong Yaqun, Shi Zide. Geothermal driving force: A new additional non-gravity action driving the migration of geothermal water in the Xinzhou geothermal field of Yangjiang, Guangdong[J]. Bulletin of Geological Science and Technology, 2022, 41(1): 137-145. doi: 10.19509/j.cnki.dzkq.2022.0014

Citation:

Mao Xumei, Ye Jianqiao, Dong Yaqun, Shi Zide. Geothermal driving force: A new additional non-gravity action driving the migration of geothermal water in the Xinzhou geothermal field of Yangjiang, Guangdong[J]. Bulletin of Geological Science and Technology, 2022, 41(1): 137-145. doi: 10.19509/j.cnki.dzkq.2022.0014

Citation:

Mao Xumei, Ye Jianqiao, Dong Yaqun, Shi Zide. Geothermal driving force: A new additional non-gravity action driving the migration of geothermal water in the Xinzhou geothermal field of Yangjiang, Guangdong[J]. Bulletin of Geological Science and Technology, 2022, 41(1): 137-145. doi: 10.19509/j.cnki.dzkq.2022.0014

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Geothermal driving force: A new additional non-gravity action driving the migration of geothermal water in the Xinzhou geothermal field of Yangjiang, Guangdong

doi: 10.19509/j.cnki.dzkq.2022.0014

Received Date: 01 Nov 2021
Available Online: 02 Mar 2022

Abstract

Abstract

The "nested multilevel flow system" summarized by Tóth and the gravity driven groundwater flow system theory summarized by Zhang Renquan et al are the important theoretical basis for groundwater migration.Groundwater flow may be affected by gravitational potential, compaction potential and tectonic compression force.However, the anomalous phenomenon that the groundwater recharge area is lower than the groundwater drainage area is found in the convective hydrothermal system.As the temperature rises, the density of geothermal water decreases and the pressure increases, and the actual pressure head of geothermal water increases, which is the physical basis for this abnormal phenomenon.This paper defines the additional pressure head as "geothermal driving force", which is related to the temperature, salinity and viscosity of geothermal water.And we propose a quantitative calculation method.In the case of Xinzhou geothermal field in Yangjiang, Guangdong Province, the starting point of the geothermal driving force is located at the deepest part of the geothermal water cycle of 4.34 km, where the standard head of the geothermal driving force generated by temperature rise is +351.59 m, and the standard head of the geothermal driving force generated by salinity increase is -2.78 m, and the standard head of total geothermal driving force is +348.81 m.The higher the geothermal water temperature is, the greater the geothermal driving force is.The greater the salinity, the smaller the geothermal driving force.The additional supporting effect of geothermal driving force can accelerate the circulation of groundwater in hydrothermal system.
- geothermal driving force,
- temperature,
- salinity,
- geothermal water,
- Xinzhou of Yangjiang

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References(33)

References

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Geothermal driving force: A new additional non-gravity action driving the migration of geothermal water in the Xinzhou geothermal field of Yangjiang, Guangdong

doi: 10.19509/j.cnki.dzkq.2022.0014

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