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Magnetic susceptibility inversion method and device

A magnetic susceptibility and inversion technology, which is applied in the fields of magnetic exploration and geophysical exploration, can solve the problems of inaccurate magnetic susceptibility and incomplete magnetic survey data, etc.

Active Publication Date: 2017-05-31
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] However, since the magnetic measurement data included in the total magnetic field intensity (TMI) data is not comprehensive enough, the magnetic susceptibility obtained by inversion in the related art is not accurate enough

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  • Magnetic susceptibility inversion method and device
  • Magnetic susceptibility inversion method and device

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Embodiment Construction

[0070] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making...

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Abstract

The invention provides a magnetic susceptibility inversion method and apparatus. The method comprises: all tensor magnetic gradient data are obtained; according to all tensor magnetic gradient data, a Tikhonov regularization model is established; with a CPU and GPU coordinated parallel way, iterative solving is carried out on the regularization model by using a conjugate gradient algorithm, and magnetic susceptibility is obtained by inversion. According to the invention, priori constraining is carried out on a model and data; a precondition type projection-onto-convex-set mixed conjugate gradient algorithm with rapid convergence is developed during the solving process; and the large-scale matrix calculation efficiency during the algorithm process is improved based on GPU and GPU combined calculation. The two-dimensional and three-dimensional fitting data examples demonstrate that the magnetic susceptibility result obtained by inversion of the all tensor magnetic gradient data is more accurate than the result obtained by TMI data calculation. With the method and apparatus, the high-precision magnetic susceptibility can be obtained by inversion; and thus a problem that the magnetic susceptibility obtained by inversion is not accurate in the prior art can be solved.

Description

technical field [0001] The invention relates to the fields of magnetic prospecting and geophysical prospecting, in particular to a magnetic susceptibility inversion method and device. Background technique [0002] Magnetic data are widely used in the field of geophysical exploration. For example, in mineral exploration, magnetic methods can be used to determine volume parameters; in oil exploration, magnetic methods can be used to map sedimentary properties and defects in the subsurface, and to control the sedimentary setting of sedimentary basins. [0003] The inversion of physical parameters, such as calculating magnetic susceptibility and magnetization, is a major scientific problem using magnetic field data. In practical applications, the magnetic susceptibility of the target geographical area can be inverted to obtain the magnetic susceptibility model of the target geographical area, through which the magnetic susceptibility model can reflect the magnetic susceptibilit...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 王彦飞邹安祺
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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