Application of Audio Magnetotelluric Sounding in Deep Geothermal Structure Exploration

WANG Mingpeng

doi:10.12401/j.nwg.2023024

2024 Vol. 57, No. 4

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WANG Mingpeng. 2024. Application of Audio Magnetotelluric Sounding in Deep Geothermal Structure Exploration. Northwestern Geology, 57(4): 240-251. doi: 10.12401/j.nwg.2023024

Citation:

WANG Mingpeng. 2024. Application of Audio Magnetotelluric Sounding in Deep Geothermal Structure Exploration. Northwestern Geology, 57(4): 240-251. doi: 10.12401/j.nwg.2023024

Application of Audio Magnetotelluric Sounding in Deep Geothermal Structure Exploration

WANG Mingpeng^1,2,

1.
College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, Henan, China
2.
Hydrogeological and Engineering Geological Survey Brigade of Jiangsu Province, Huai′an 223005, Jiangsu, China

Received Date: 06 July 2022

Revised Date: 20 September 2023

Publish Date: 20 August 2024

Abstract

Abstract

In order to investigate the deep geothermal structure in Liushan Lake Scenic Area, Sihong County, Jiangsu Province, geological and geophysical data and known exploration borehole data were collected, 14 Audio Magnetotelluric Sounding (AMT) survey lines were laid, and the resistivity distribution of the shallow geological body at 2000 m in the study area was obtained through data acquisition, pre-processing and inversion. The exploration results show that there was a good low resistance distribution zone in the study area with good continuity, and two deep structural fault f₁ and f₂ are inferred. Among them, fault f₂ is presumed to be large in scale and contains water in the fracture zone, while the upper part of the fracture zone is a complete-more complete high-resistance layer, which may be a good cover layer. Therefore, it is speculated that the deep fracture zone f₂ has good water-bearing and storage channels, and it is suggested to focus on the location of the low resistance anomaly in the tectonic zone to provide a basis for the next drilling placement.
- Audio Magnetotelluric Sounding(AMT) /
- geothermal exploration /
- Tancheng-Lujiang fault zone /
- deep structure /
- Liushan lake

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References

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