One-dimensional Occam's inversion for transient electromagnetic data excited by a loop source

XING Tao; YUAN Wei; LI Jian-Hui

doi:10.11720/wtyht.2021.0103

2021 Vol. 45, No. 5

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XING Tao, YUAN Wei, LI Jian-Hui. 2021. One-dimensional Occam's inversion for transient electromagnetic data excited by a loop source. Geophysical and Geochemical Exploration, 45(5): 1320-1328. doi: 10.11720/wtyht.2021.0103

Citation:

XING Tao, YUAN Wei, LI Jian-Hui. 2021. One-dimensional Occam's inversion for transient electromagnetic data excited by a loop source. Geophysical and Geochemical Exploration, 45(5): 1320-1328. doi: 10.11720/wtyht.2021.0103

One-dimensional Occam's inversion for transient electromagnetic data excited by a loop source

1. Beijing Exploration Resources Technology Co., Ltd., Beijing 100071, China;
2. Inner Mongolia Geological Engineering Co., Ltd., Hohhot 010010, China;
3. Institute of Geophysics and Geomatics, China University of Geosciences(Wuhan), Wuhan 430074, China

Received Date: 26 February 2021

Revised Date: 20 October 2021

Publish Date: 15 December 2021

Abstract

Abstract

A 1D inversion code is developed for the loop-source transient electromagnetic method (TEM) based on the open-source code Dipole1D and Occam's algorithm. This code is tested by a four-layer stratified model. Then, the model with a tilted earth-air interface is considered, for which the synthetic data are calculated by 3D finite-element method. The inversion results show that 1D inversion can be directly used for the scenario with tilted interface. Finally, this 1D inversion code is used for a field case, in which TEM is employed to delineate the 3D distributed domains of a basalt which intruded into shale and sandstone. The inversion result shows that the thickness of the basalt coincides with the drilling data, and the shape of the basalt like a pot bottom.
- loop source /
- TEM /
- Occam's method /
- 1D inversion

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References

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