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Method and system for inverting underground magnetic susceptibility by adopting full-tension magnetic gradient data

A data inversion and magnetic gradient technology, applied in the fields of magnetic exploration and geophysical exploration, can solve problems such as low precision, inaccurate magnetic susceptibility, and no consideration of the bounded constraints of physical parameters, and achieves increasing step size, improving The effect of precision

Inactive Publication Date: 2018-06-29
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the accuracy of the traditional magnetic susceptibility inversion method based on TMI data is low; in the existing magnetic susceptibility inversion technology, only statistical regularization and transformation-based filtering methods are considered to reconstruct physical parameters, but there is no Consider boundedness constraints on physical parameters, resulting in inaccurate magnetic susceptibility inversion

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  • Method and system for inverting underground magnetic susceptibility by adopting full-tension magnetic gradient data
  • Method and system for inverting underground magnetic susceptibility by adopting full-tension magnetic gradient data

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Embodiment Construction

[0039] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0040] Such as figure 1As shown, what Embodiment 1 of the present invention provides is a method for inverting underground magnetic susceptibility using full tensor magnetic gradient data, the method comprising:

[0041] S1, to obtain the full tensor magnetic gradient data;

[0042] S2. Establish a sparse regularization model according to preset prior constraints and the full tensor magnetic gradient data;

[0043] S3, iteratively solving the sparse regularization model based on the improved conjugate gradient algorithm, and inverting to obtain the magnetic susceptibility.

[0044] Through the above method, some prior constraints are set, and a sparse regularization model is established, so that the bounded constr...

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Abstract

The invention relates to a method and a system for inverting the underground magnetic susceptibility by adopting full-tension magnetic gradient data. The method comprises the following steps: acquiring the full-tension magnetic gradient data; building a sparse regularization model according to preset prior constraint conditions and the full-tension magnetic gradient data; performing iterative solution on the sparse regularization model based on an improved conjugate gradient algorithm, and performing inversion to obtain the magnetic susceptibility. The invention further relates to a system. The system comprises a data acquisition module, a model building module and a magnetic susceptibility inversion module. According to the method disclosed by the invention, by the setting of some prior constraint conditions, the sparse regularization model is built, so that bounded constraining of physical parameters can be considered, and the accuracy of inverting the magnetic susceptibility is greatly improved.

Description

technical field [0001] The invention belongs to the fields of magnetic prospecting and geophysical prospecting, and in particular relates to a method and system for inverting the magnetic susceptibility of underground media by using full tensor magnetic gradient data. Background technique [0002] Magnetic prospecting is an important part in the field of geophysical prospecting, and it is widely used in mineral and oil prospecting. For example, in mineral exploration, magnetic methods can be used to determine the parameters of subsurface media; in oil exploration, magnetic methods can be used to map the sedimentary characteristics and defects of the subsurface, and to control the sedimentary background of sedimentary basins. [0003] Magnetic prospecting is a geophysical method to study the distribution of geological structures, mineral resources or other detection objects by observing and analyzing magnetic anomalies caused by magnetic differences in rocks and ores. The in...

Claims

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Application Information

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IPC IPC(8): G01V3/40G01V3/38G01V3/08G06F17/16
CPCG01V3/081G01V3/38G01V3/40G06F17/16
Inventor 邹安祺王彦飞
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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