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2023 Vol. 50, No. 5
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Article navigation > Geology in China > 2023 > 50(5): 1387-1398
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SUN Minghang, WANG Ruihu, LIANG Lige, DENG Bin, LI Yukun, LIU Demin, GUAN Yanwu. 2023. Characteristics and potential evaluation of geothermal resources in Guangxi[J]. Geology in China, 50(5): 1387-1398. doi: 10.12029/gc20220221001
Citation: SUN Minghang, WANG Ruihu, LIANG Lige, DENG Bin, LI Yukun, LIU Demin, GUAN Yanwu. 2023. Characteristics and potential evaluation of geothermal resources in Guangxi[J]. Geology in China, 50(5): 1387-1398. doi: 10.12029/gc20220221001
shu

Characteristics and potential evaluation of geothermal resources in Guangxi

  • 1.

    Guangxi Institute of Geological Survey, Nanning 530023, Guangxi, China

  • 2.

    School of Earth Sciences, China University of Geosciences, Wuhan 430074, Hubei, China

  • 3.

    College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, Jilin, China

    • Fund Project: Supported by the Talents Small Highland Project of Key Mineral Resources Deep Prospecting in Guangxi (Guizu Tongzi [2019] No.85, 2019-2023) and Hepu Basin Hot Dry Rock Geothermal Resources Survey Project in Guangxi (Guidi Kuangdi [2021] No. 23)
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  • Author Bio: SUN Minghang, male, born in 1989, engineer, engaged in regional geological and mineral investigation work; E-mail: smhgxddy@163.com
  • Corresponding author: DENG Bin, male, born in 1965, senior engineer, engaged in regional geological and mineral investigation work; E-mail: 416069109@qq.com 
Received Date:  21 February 2022
Revised Date:  10 March 2022
Publish Date:  25 October 2023
    Abstract

  • This paper is the result of geothermal resources survey engineering.

     Objective

    In Guangxi, the geothermal resource is extensively distributed, and is a competitive low-carbon, renewable and clean energy. Up to now, the systematic research on the occurrence regulation, distribution characteristics and potential of geothermal resources is relatively weak, to a certain extent, which restricts the comprehensive development and utilization in Guangxi.

     Methods

    In this paper, we systematically analyzed the structure of the crust and mantle layer, the present characteristics of the geothermal field and the distribution pattern of geothermal resources, based on the latest results of the survey and evaluation of shallow geothermal, hydrothermal and hot dry rock geothermal resources in Guangxi since the "Twelfth Five-Year Plan". And we chose different methods to evaluate the development and utilization potential of shallow geothermal energy resources, hydrothermal geothermal resources and hot dry rock geothermal resources.

     Results

    The research shows that the geothermal resources are rich in Guangxi, with obvious occurrence rules and zoning characteristics. In 13 major cities, the shallow and hydrothermal geothermal resources are mainly developed through direct utilization, and the shallow geothermal resources are 1.23×1015 kJ/℃, the annual exploitable resources are 1.36×1012 kJ/a, equivalent to 1.67×108 t standard coal. And 24 warm(hot) springs points and 28 geothermal mining wells locating in Guangxi, the total amount of geothermal energy resources is 2.56×1017 kJ, which is equivalent to 87.58×108 t of standard coal. On the other hand, the annual recoverable heat of geothermal fluid is 28.89×1012 kJ/a, which is equivalent to 315.65×104 t of standard coal. Finally, the potential of dry hot geothermal resources is great in Guangxi, within 3-10 km of the land area, the total amount of hot dry rock resources is 55.42×104 EJ, which is equivalent to 18.91×1012 t of standard coal, at a recoverable rate of 2% which is 75.94 times the 2020 Chinese primary energy consumption(4.98 billion tons). Therefore, it is becoming the most ideal replacement carrier for traditional fossil energy.

     Conclusions

    Guangxi is lack of coal, oil and gas in the traditional energy field, and has rich wind, water and heat in the new energy field. The rational development and utilization of geothermal resources will contribute to the optimization of energy structure and the strategic adjustment of industrial structure in Guangxi, and help to achieve the "dual carbon goal".
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