Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (4): 1151-1160.doi: 10.13278/j.cnki.jjuese.20200025

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Evaluation of Thermal Conditions and Potential of Dry Hot Rock Resources in Hepu Basin, Guangxi

Kang Zhiqiang1,2,3, Zhang Qizuan3, Guan Yanwu4, Feng Bo5, Yuan Jinfu3, Sun Minghang6, Liu Demin7, Wang Xinyu3, Yang Zhiqiang3, Lu Jipu3, Zhang Qinjun6, Feng Minhao6   

  1. 1. Key Laboratory of Surficial Geochemistry(Nanjing University), Ministry of Education/School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;
    2. China-ASEAN Geosciences Cooperation Center(Nanning), Nanning 530023, China;
    3. Guangxi Bureau of Geology & Mineral Prospecting & Exploitation, Nanning 530023, China;
    4. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China;
    5. College of New Energy and Environment, Jilin University, Changchun 130021, China;
    6. Guangxi Institute of Geological Survey, Nanning 530023, China;
    7. School of Earth Sciences, China University of Geosciences(Wuhan), Wuhan 430074, China
  • Received:2020-02-15 Published:2020-07-29
  • Supported by:
    Supported by Guangxi Science and Technology Base and Talent Special Project (Guike AD17129052) and Guangxi Bureau of Geology and Mineral Exploration and Development Has Budgeted for Geological Exploration Projects in the Early Stage(Guidi Kuangzong 2018-12,2018-18)

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Abstract: Hot dry rock (HDR) is a kind of clean and renewable geothermal resource. The utilization of HDR is of great significance to the improvement of energy structure of Guangxi. The early studies show that the eastern and southern areas of Guangxi have HDR development potential. Based on Guangxi aeromagnetic survey data, the Curie point depth was calculated by using Parker-Oldenburg interface inversion method. The terrestrial heat flow values and temperatures at several different depths were also calculated. It is found that the calculation results are consistent with the actual measurement temperature data, indicating that there are formation conditions for the HDR resources in Xichang and Changle sags in Hepu basin. The reservoir and seal conditions of the HDR resources in Hepu basin were analyzed based on the basic geological survey and a large number of borehole data. Two hot-dry rock exploration target areas C1 and C2 located in Xichang and Changle sags were initially circled, with an area of 167.10 km2 and 72.90 km2, respectively. The HDR resources are 182.48×1015 J in C1, and are 77.59 ×1015 J in C2. Based on 20% recovery rate, the total amount of HDR resources in Hepu basin is 52.01×1015 J, which is equivalent to 177.48×104 t of standard coal. It accounts for 4.72 % of the total energy production of 3756.69×104 t standard coal in Guangxi in 2018. Based on the resource evaluation, it is recommended that further exploration should be given to the C1 target area,which is located in Xichang sag of Hepu basin.

Key words: hot dry rock, thermal condition, potential evaluation, Hepu basin in Guangxi

CLC Number: 

  • P314
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