Hydrogeochemical characteristics of deep geothermal fluids in the Binhai New Area, Tianjin City

SHI Xiao-Jin; LI Yuan-Yuan; HUANG Xian-Long

doi:10.11720/wtyht.2022.1182

2022 Vol. 46, No. 2

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Article navigation > Geophysical and Geochemical Exploration > 2022 > 46(2): 316-322

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SHI Xiao-Jin, LI Yuan-Yuan, HUANG Xian-Long. 2022. Hydrogeochemical characteristics of deep geothermal fluids in the Binhai New Area, Tianjin City. Geophysical and Geochemical Exploration, 46(2): 316-322. doi: 10.11720/wtyht.2022.1182

Citation:

SHI Xiao-Jin, LI Yuan-Yuan, HUANG Xian-Long. 2022. Hydrogeochemical characteristics of deep geothermal fluids in the Binhai New Area, Tianjin City. Geophysical and Geochemical Exploration, 46(2): 316-322. doi: 10.11720/wtyht.2022.1182

Hydrogeochemical characteristics of deep geothermal fluids in the Binhai New Area, Tianjin City

Tianjin Geothermal Exploration and Development-Designing Institute, Tianjin 300250,China

Received Date: 30 March 2021

Publish Date: 28 June 2022

Abstract

Abstract

The understanding of the Paleogene Dongying formation and the Jixianian Wumishan formation have been gradually deepened with the exploration and development of deep thermal reservoirs in the Binhai New Area.This paper analyzes the hydrochemical characteristics, reservoir temperature, and hydrogeochemical effects of the geothermal fluid of the Dongying and Wumishan formations, thus providing bases for the further development and utilization of deep geothermal resources. The Wumishan formation in the Ninghe salient is adequately recharged. In contrast,the Dongying formation occursin a relatively closed environment, and the geothermal fluid in it is at a state of chemical equilibrium. The average temperature of the geothermal reservoirs in the Wumishan and Dongying formation scalculated using geothermometers is about 126 ℃ and 100 ℃, respectively. The geothermal fluid in both formations originates from atmospheric precipitation. Compared to the Wumishan formation, the geothermal fluidin the Dongying formation exchanges heat with rocks for a longer time and has a weaker cycling capacity. The runoff direction of the geothermal fluid in the formations is from northeast to southwest, with leaching, cation exchange, precipitation,and mixing mainly occurring during the fluid runoff.
- deep geothermal reservoir /
- hydrochemical characteristics /
- reservoir temperature /
- hydrogeochemical effect

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References

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