Artificial source tensor electromagnetic exploration method with far references

A remote reference and artificial source technology, applied in the field of electromagnetic detection, can solve problems such as unusable, data information loss, and low signal-to-noise ratio
CN105301664AActive Publication Date: 2016-02-03CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2016-02-03

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Abstract

The invention provides an artificial source tensor electromagnetic exploration method with far references. The method comprises the following steps of: (1) arranging one or more far reference points while arranging measuring points, and synchronously recording a time variable of current sending of an artificial field source, and electromagnetic fields of the measuring points and the far reference points; (2) constructing a measuring point matrix X and a reference data matrix Xr; (3) utilizing the reference data matrix Xr to solve a natural electromagnetic field source polarized parameter [alpha], calculating a polarized parameter [beta] according to the time variable of current sending of the artificial field source, and then utilizing [alpha] and [beta] and X to solve a corresponding spatial modulus U of the measuring points to a natural field source and a corresponding spatial modulus V to the artificial field source; and (4) utilizing U and V to solve natural field tensor impedance and artificial field tensor impedance of each measuring point. Based on a conventional artificial field electromagnetic method, one or more far reference points are additionally arranged for data collection; and based on unified data equations, the natural field tensor impedance and the artificial field tensor impedance of each measuring point are simultaneously obtained by one time of processing, and earth electrical parameters required by interpretation are obtained.
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Description

technical field

[0001] The invention relates to an electromagnetic detection method in the field of surveying geophysics, in particular to an artificial source tensor electromagnetic detection method with remote reference. Background technique

[0002] In the field of reconnaissance geophysical electromagnetic methods, the natural field source electromagnetic method (Magnetotelluric, MT; Audio-frequency Magnetotelluric, AMT) has a large detection depth and a light acquisition device, but has a low signal-to-noise ratio and weak anti-noise ability; the traditional far-reference magnetotelluric method A far reference point is introduced while observing the natural electromagnetic field in the survey area, and the influence of noise in the survey area is suppressed by using the characteristics that the reference track signal is correlated with the signal of the survey area and the noise is not correlated, and the quality of impedance data is improved to a certain extent; but It...

Claims

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