地表水长期回灌对温汤断裂热储的影响

樊柄宏; 白细民; 叶海龙; 周国彬; 李严严; 曾梓琪; 陈进; 王正

doi:10.3799/dqkx.2025.110

Volume 50 Issue 12

Dec. 2025

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Article Navigation > Earth Science > 2025 > 50(12): 4894-4908

Fan Binghong, Bai Ximin, Ye Hailong, Zhou Guobin, Li Yanyan, Zeng Ziqi, Chen Jin, Wang Zheng, 2025. Influence of Long-Term Surface Water Reinjection on Thermal Reservoir of Wentang Fault. Earth Science, 50(12): 4894-4908. doi: 10.3799/dqkx.2025.110

Citation:

Fan Binghong, Bai Ximin, Ye Hailong, Zhou Guobin, Li Yanyan, Zeng Ziqi, Chen Jin, Wang Zheng, 2025. Influence of Long-Term Surface Water Reinjection on Thermal Reservoir of Wentang Fault. Earth Science, 50(12): 4894-4908. doi: 10.3799/dqkx.2025.110

Citation:

Fan Binghong, Bai Ximin, Ye Hailong, Zhou Guobin, Li Yanyan, Zeng Ziqi, Chen Jin, Wang Zheng, 2025. Influence of Long-Term Surface Water Reinjection on Thermal Reservoir of Wentang Fault. Earth Science, 50(12): 4894-4908. doi: 10.3799/dqkx.2025.110

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Influence of Long-Term Surface Water Reinjection on Thermal Reservoir of Wentang Fault

doi: 10.3799/dqkx.2025.110

Fan Binghong^{1, 2
,
,},
Bai Ximin^{1, 2
,
,},
Ye Hailong^{1, 2
,
,},
Zhou Guobin¹,
Li Yanyan³,
Zeng Ziqi^{1, 2},
Chen Jin¹,
Wang Zheng^{1, 2}

1.
Hydrogeology Brigade of Jiangxi Geological Bureau, Nanchang 330095, China
2.
Nanchang Key Laboratory of Hydrogeology and High Quality Groundwater Resources Exploitation and Utilization, Nanchang 330095, China
3.
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China

Received Date: 2025-01-17
Publish Date: 2025-12-25

Abstract

Abstract

Fractured geothermal reservoir reinjection has garnered significant attention for its remarkable effectiveness in enhancing geothermal water supply capacity, raising water levels, and mitigating resource and environmental issues associated with geothermal exploitation. This study focuses on the Yichun Wentang geothermal field, employing time series analysis and hydrogeochemical methods to analyze long-term monitoring data of reinjection volume, extraction volume, water temperature, water level, and water quality during surface water reinjection and extraction processes. The study summarizes the dynamic variations in the geothermal field's temperature field, fluid field, and chemical field, and investigates the sustainability and safety of long-term reinjection in fractured reservoirs. The results indicate that reinjection volume is the primary factor influencing the dynamic changes in the temperature, fluid, and chemical fields. Long-term reinjection raises the geothermal field's water level by 3.952-4.986 m, increases the dynamic amplitude of water level fluctuations by 13.4 times, and reverses the planar distribution direction of water levels. When the reinjection volume remains below the threshold, the production well's water temperature exhibits an inverse correlation with reinjection volume, delayed by 3-12 months; exceeding the threshold leads to a "cliff-like" decline in temperature. Long-term reinjection causes an overall decrease in well temperatures, with a maximum reduction of 6.8-10.0 ℃, though stabilization occurs after controlling reinjection volume. Reinjection water directly "dilutes" geothermal water, shifting hydrochemical types in the Piper diagram toward surface water characteristics, transitioning from HCO₃-Na type to HCO₃·SO₄-Na·Ca type. Long-term monitoring confirms that the geothermal field remains safe and controllable when reinjection volume is maintained below 9, 734 m³/d, increasing resource availability by 414%. Surface water reinjection in fractured reservoirs demonstrates good feasibility and safety, provided the reinjection volume does not exceed the threshold.
- Wentang,
- fracture-controlled convection,
- geothermal,
- surface water reinjection,
- reservoir dynamics,
- hydrogeology

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Influence of Long-Term Surface Water Reinjection on Thermal Reservoir of Wentang Fault

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