Research status of geothermal energy detection technology in middle-deep depths in China
Received date: 2024-03-28
Online published: 2025-03-13
Copyright
As a green, low-carbon, safe, high-quality and recyclable renewable energy, geothermal energy is of great significance to the adjustment of China's energy structure and the realization of the goal of "double carbon". As an environmentally friendly and non-destructive method, geophysical methods are widely used in the exploration of middle-deep geothermal resources, which can effectively detect deep hidden fault structures and obtain important information such as strata and buried depth. This paper systematically investigates the research and application status of common geophysical methods and exploration equipment at home and abroad in the detection of geothermal energy in medium and deep layers, analyzes the advantages of each geophysical detection method under its applicable conditions, and summarizes the research ideas of the detection of geothermal resources in medium and deep layers. According to the application examples of geophysical detection methods in geothermal areas, the adaptability, effectiveness and accuracy of geophysical detection methods in the detection of geothermal energy in medium and deep layers are expounded.
Kuan CHANG , QianJiang ZHANG , QiYun JIANG , Tao GUO , WenBin YIN , Jie LI , Hui TAN , YuanNing PAN , Xin MA . Research status of geothermal energy detection technology in middle-deep depths in China[J]. Progress in Geophysics, 2025 , 40(1) : 54 -69 . DOI: 10.6038/pg2025HH0524
图1 (a) WFEM优化后容城地热田结构示意图;(b)广域GY1反演模型;(c)广域GY2反演模型(Zhu et al., 2023)Fig 1 (a)Structure diagram of Rongcheng geothermal field optimized by WFEM; (b)Inversion model and interpretation of GY1;(b)Inversion model and interpretation of GY2(Zhu et al., 2023) |
图2 频散曲线(a)和反演S波速度结构(b)(Tian et al., 2022)Fig 2 Dispersion curve (a) and inversion S-wave velocity structure (b)(Tian et al., 2022) |
图3 所有测量点的频散曲线(a)和二维视S波速度剖面,以识别热流的埋藏通道(b)(Tian et al., 2022)Fig 3 Dispersion curve of all the survey points (a) and 2D apparent S-wave velocity section to identify the buried channel for heat flow (b)(Tian et al., 2022) |
图4 所有测点的频散曲线(a)和二维视S波速度剖面,以跟踪盖层或储层的不规则形状(b)(Tian et al., 2022)Fig 4 Dispersion curve of all the survey points (a) and 2D apparent S-wave velocity section to track the irregular shapes of the cap layers or reservoirs (b)(Tian et al., 2022) |
表1 ZMS-6数字重力仪与CG-5重力仪指标对比(吕庆田等, 2019)Table 1 Comparison of indicators of ZMS-6 digital gravimeter and CG-5 gravimeter(Lü et al., 2019) |
| 序号 | 技术指标 | CG-5重力仪 | ZSM-6重力仪 |
|---|---|---|---|
| 1 | 读数分辨率/mGal | 0.001 | 0.001 |
| 2 | 最小直读范围/mGal | 8000 | 不小于7000 |
| 3 | 残余长期漂移 | ≤0.02 mGal/24 H | ≤0.03 mGal/24 H |
| 4 | 观测误差 | 0.005 mGal | 优于±0.02 mGal |
| 5 | 功耗 | 4.5 W(温度250 ℃) | ≤10 W |
| 6 | 工作温度范围/℃ | -40~+50 | -20~+45 |
| 7 | 重量/kg | 8 | 8.6 |
感谢审稿专家提出的修改意见和编辑部的大力支持!
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