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Ground-well transient electromagnetic inversion method based on non-structural finite element method

A transient electromagnetic and finite element technology, applied in the direction of instrumentation, design optimization/simulation, calculation, etc., can solve the problems of lack of inversion research, limitations, etc., to save computing space, improve efficiency and accuracy, and avoid errors.

Active Publication Date: 2021-06-11
JILIN UNIV
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Problems solved by technology

However, no matter what method is used, it is limited to the level of forward modeling, and the relevant research on inversion is very scarce.

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  • Ground-well transient electromagnetic inversion method based on non-structural finite element method
  • Ground-well transient electromagnetic inversion method based on non-structural finite element method
  • Ground-well transient electromagnetic inversion method based on non-structural finite element method

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0027] figure 1 It is a flow chart of the ground-well transient electromagnetic inversion method based on the non-structural finite element method provided by the embodiment of the present invention. Such as figure 1 As shown, the ground-well transient electromagnetic inversion method based on the non-structural finite element method provided by the embodiment includes the following steps:

[0028] Step 1, construct the initial ground-well model.

[0029] When constructing the initial ground-well model, a geometric model is constructed for detecting geological structu...

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Abstract

The invention discloses a ground-well transient electromagnetic inversion method based on a non-structural finite element method, and the method comprises the following steps: employing the non-structural finite element method to construct an initial ground-well model for a detection geologic structure, meanwhile, according to the observation electromagnetic data, the prediction electromagnetic data obtained through forward modeling and an inversion reference model of the earth-well model, a regularized inversion objective function is constructed; and performing forward modeling calculation on the initial ground-well model to obtain predicted electromagnetic data, realizing ground-well transient electromagnetic iterative inversion according to the predicted electromagnetic data and a regularized inversion objective function, continuously updating the inversion reference model until an inversion termination condition is met, and obtaining a final inversion reference model conforming to the exploration geologic structure. And the speed and the accuracy of ground-well transient electromagnetic inversion are improved.

Description

technical field [0001] The invention belongs to the field of geological exploration, and in particular relates to a ground-well transient electromagnetic inversion method based on a non-structural finite element method. Background technique [0002] Mineral resources have provided great help for the rapid development of my country's economy, but with a large number of mining, the mineral resources in the shallow underground have become less and less, and have basically been fully developed. In order to meet the needs of further development, deep ore prospecting must be taken as the key research direction of current energy development. [0003] As a commonly used geophysical detection technology, transient electromagnetic (TEM) has been widely used in mineral resources and energy exploration, groundwater resource investigation, underground structural characteristics research and other fields. The basic principle of TEM is Faraday's law of electromagnetic induction. The prim...

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Application Information

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IPC IPC(8): G06F30/23G06T17/20
CPCG06F30/23G06T17/20
Inventor 王路远刘云鹤殷长春
Owner JILIN UNIV
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