Heat Accumulation Mechanism and Resources Potential of the Karst Geothermal Reservoir in Liangcun Buried Uplift of Linqing Depression

被引：0
|
作者：
Kang F. [1 ,2 ,3 ,4 ]
Zhao J. [2 ,5 ]
Huang X. [2 ,5 ]
Sui H. [1 ,2 ]
机构：
[1] College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao
[2] 801 Institute of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology and Mineral Resources（SPBGM）, Jinan
[3] Shandong Engineering Technology Research Center for Geothermal Clean Energy Exploitation and Reinjection, Dezhou
[4] School of Water Conservancy and Environment, University of Jinan, Jinan
[5] Second Institute of Hydrogeology and Engineering Geology, SPBGM, Dezhou
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2023年 / 48卷 / 03期
关键词：
four‐sources heat accumulation; geothermal water resources; karst reservoir; Liangcun buried uplift; power generation;
D O I：
10.3799/dqkx.2022.324
中图分类号：
学科分类号：
摘要：
Geothermal energy is a green and low-carbon clean energy, and its large-scale development and utilization to replace fossil energy is of great significance to reduce carbon emissions and improve the atmospheric environment. In order to promote the geothermal electricity production by low-median temperature geothermal resources, and to fulfill the goal of carbon peak and carbon neutrality, this paper evaluated the resource sufficiency for a 10 MW geothermal power plant demonstration project based on the heat accumulation mechanism and geothermal resources potential of the karst reservoir in Liangcun buried uplift. Based on the correlation analysis between geothermal gradient，heat flow value and concave-convex structural lattice，thermal conductivity of rocks, together with the combination relationship study between karst development characteristics, thermal water abundance and structure, lithology, hydrodynamic conditions, the four-sources heat accumulation mechanism of the karst reservoir in Liangcun buried uplift is revealed as: the first source is high terrestrial heat flux caused by the destruction of north China Craton and lithosphere thinning, the second source is the thermal accumulation of the high thermal conductivity diffluence in the uplift area, the third source is the belt shaped convective thermal accumulation in the deep fault zone, and the fourth source is convective heat flow accumulation of diagenetic compaction water. Furthermore, the available heat resources and geothermal water resources in the Cambrian-Ordovician karst reservoir in Liangcun buried uplift are estimated to be 2.218 3×1019 J and 6.34×109 m3, respectively. Driven by four-sources heat accumulation, the Liangcun buried uplift karst geothermal field with high thermal gradient was formed, and its thermal energy and geothermal water resources met the demand of 10 MW geothermal power station. © 2023 China University of Geosciences. All rights reserved.
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页码：1080 / 1092
页数：12
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