3D geological modeling of mine karst geothermal reservoir and geothermal resources evaluation

被引：0

作者：

Zhang, Yuan ^{[1
,2
]}

Wan, Zhijun ^{[2
]}

Hu, Songbo ^{[1
]}

Wang, Zhuting ^{[5
]}

Zhang, Bo ^{[3
]}

Zhao, Dong ^{[4
]}

机构：

[1] School of Mines, China University of Mining and Technology, Xuzhou

[2] State Key Laboratory of Coal Accurate Exploration and Intelligent Mining, China University of Mining and Technology, Xuzhou

[3] Institute of Coal Mining and Utilization, Pingdingshan Tianan Coal Mining Co., LTD., Pingdingshan

[4] No.10 Coal Mine, Pingdingshan Tianan Coal Mining Co., LTD., Pingdingshan

[5] School of Earth and Environment, Anhui University of Science and Technology, Huainan

来源：

Meitan Xuebao/Journal of the China Coal Society | / 49卷 / 08期

关键词：

geological modeling; geothermal water; karst geothermal reservoir; mine geothermal; reserve evaluation;

D O I：

10.13225/j.cnki.jccs.2023.1034

中图分类号：

学科分类号：

摘要：

The traditional geothermal reservoir volume method is suitable for the evaluation of geothermal resources in large-scale regions, but there is a significant error when it is used for the evaluation of mine geothermal resources. On the basis of analyzing the characteristics of the geothermal system of the Cambrian karst geothermal reservoir, i.e., heat sources, fluid channels, reservoirs, caprocks and the heat fluid in the Pingdingshan mining area, a conceptual model of geothermal genesis in the Pingdingshan coalfield was established. Based on the geothermal geological conditions and drilling data ground and underground in No.10 Coal Mine of Pingdingshan Tianan Coal Mining Co., LTD., a three-dimensional geological model of the strata in the study area was established using Groundwater Modeling System software. The distribution of Cambrian karst strata and its overburden strata was displayed, and the Cambrian karst strata space was gridded and digitized. The integrated geothermal reservoir volume method for evaluating geothermal resources in mines was proposed and used to estimate the static resource quantity of the Cambrian karst geothermal reservoir in the study area, and the dynamic resource quantity of the geothermal reservoir was also evaluated. The relationship curve between the geothermal reservoir resource quantity and water level elevation was obtained. A complete water quality analysis was conducted on the karst geothermal water in the study area, and the corrosiveness and scaling properties of the geothermal water were evaluated. The results show that the Cambrian carbonate strata in the study area are the karst geothermal reservoir, and the heat mainly comes from high-temperature rock mass deep in the Cambrian Zhushadong Formation; surface atmospheric precipitation enters the deep rock mass through Cambrian limestone outcrops and deep faults around the mining area, and is heated along the way and stored in Cambrian limestone, after which the water continue to receive the heat from deep bedrock and then forms a hydrothermal karst geothermal reservoir; the static hot water resource of Cambrian karst strata in the study area is 7.68 billion m3, containing heat of 1.19×1018 J; the heat contained in the rock is 3.25×1018 J, with a total geothermal resource of 4.44×1018 J; the recoverable geothermal resources are 6.66×1017 J, equivalent to 22.7 million tons of standard coal; the Cambrian karst hot water has slight corrosiveness, with a slight to moderate degree of scaling. Corrosion and scale prevention treatments are required for metal pipelines and containers of the geothermal water. © 2024 China Coal Society. All rights reserved.

引用

页码：3571 / 3579

页数：8

共 33 条

[1] WANG Guiling, ZHANG Wei, LIANG Jiyun, Et al., Evaluation of geothermal resources potential in China[J], Acta Geoscientica Sinica, 38, 4, (2017)
[2] WANG Jiyang, HU Shengbiao, PANG Zhonghe, Et al., Estimate of geothermal resources potential for hot dry rock in the continental area of China[J], Science & Technology Review, 30, 32, (2012)
[3] YUAN Liang, ZHANG Tong, ZHANG Qinghe, Et al., Construction of green, low-carbon and multi-energy complementary system for abandoned mines under global carbon neutrality[J], Journal of China Coal Society, 47, 6, pp. 2131-2139, (2022)
[4] CAI Meifeng, MA Minghui, PAN Jiliang, Et al., Co-mining of mineral and geothermal resources：A state-of-the-art review and future perspectives[J], Chinese Journal of Engineering, 44, 10, pp. 1669-1681, (2022)
[5] WAN Zhijun, BI Shike, ZHANG Yuan, Et al., Framework of the theory and technology for simultaneous extraction of coal and geothermal resources[J], Journal of China Coal Society, 43, 8, pp. 2099-2106, (2018)
[6] YANG Xiaojie, HAN Qiaoyun, TIAN Yihong, Et al., Mechanism of high-temperature heat-hazard at sanhejian coal mine, Xuzhou[J], Chinese Journal of Rock Mechanics and Engineering, 32, 12, pp. 2447-2454, (2013)
[7] BI Shike, WAN Zhijun, ZHANG Hongwei, Et al., Research on development and utilization of geothermal resources in Tangkou Coal Mine[J], Coal Science and Technology, 46, 4, pp. 208-214, (2018)
[8] WAN Zhijun, ZHANG Yuan, SHI Peng, Et al., Numerical simulation on unconventional mining of geothermal water in coal-heat co-mining mode[J], Journal of China Coal Society, 48, 3, (2023)
[9] ZHU Xi, WANG Guiling, MA Feng, Et al., Evaluation of geothermal resources of the Xiongan new area[J], Earth Science, 48, 3, pp. 1093-1106, (2023)
[10] XIE Na, YU Shengbo, DING Hongwei, Et al., Occurrence features of geothermal resources and geothermal potential assessment in Gansu Province[J], Geology in China, 47, 6, pp. 1804-1812, (2020)

← 1 2 3 4 →