The influence of geothermal resources exploitation of sandstone thermal reservoir on land subsidence in Decheng District, Dezhou City

WANG Mingzhu; WAN Junwei; BAI Tong; LIU Yi; SHEN Fang

doi:10.16788/j.hddz.32-1865/P.2021.02.009

2021 Vol. 42, No. 2

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Article navigation > East China Geology > 2021 > 42(2): 202-209

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WANG Mingzhu, WAN Junwei, BAI Tong, LIU Yi, SHEN Fang. 2021. The influence of geothermal resources exploitation of sandstone thermal reservoir on land subsidence in Decheng District, Dezhou City. East China Geology, 42(2): 202-209. doi: 10.16788/j.hddz.32-1865/P.2021.02.009

Citation:

WANG Mingzhu, WAN Junwei, BAI Tong, LIU Yi, SHEN Fang. 2021. The influence of geothermal resources exploitation of sandstone thermal reservoir on land subsidence in Decheng District, Dezhou City. East China Geology, 42(2): 202-209. doi: 10.16788/j.hddz.32-1865/P.2021.02.009

The influence of geothermal resources exploitation of sandstone thermal reservoir on land subsidence in Decheng District, Dezhou City

1. No.2 Hydrogeology and Engineering Geology Brigade, Shandong Exploration Bureau of Geology and Mineral Resources(Lubei Geo-engineering Exploration Institute), Dezhou 253072, Shandong, China;
2. Geothermal Resources and Reinjection Research Center of Shandong Province, Dezhou 253072, Shandong, China

Received Date: 25 April 2020

Revised Date: 11 July 2020

Publish Date: 18 August 2021

Abstract

Abstract

Decheng district is the main area of geothermal resources exploitation of sandstone thermal reservoir in northwest of Shandong Province. However, whether geothermal water exploitation will affect land subsidence has not been studied, which will directly affect the local government's decision-making and standardized management of geothermal resources exploitation. According to the theory of soil consolidation, under the same consolidation conditions and the same decrease of water level, the ratio of effective stress increment to self-weight stress of thermal reservoir is much lower than that of deep groundwater exploitation layer. Combined with the drilling data, it is considered that the thermal reservoir in this area is a semi-diagenetic state with argilllic cementation, and its compressibility is far lower than that of deep groundwater exploitation. Based on the geothermal resource exploitation policy of this area, by analyzing the existing hierarchical standard monitoring data, it is found that the influence of geothermal water exploitation on land subsidence is not significant under the current mining condition.
- sandstone geothermal reservoir /
- geothermal water exploitation /
- land subsidence /
- Dezhou district

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References

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