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Magnetotelluric forward method, forward system, storage medium, and electronic device

A magnetotelluric and forward modeling technology, applied in the field of exploration geophysics, can solve problems such as narrow application range

Inactive Publication Date: 2019-10-18
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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  • Abstract
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Problems solved by technology

However, based on the existing forward modeling system, its application range is relatively narrow when the inversion based on the forward modeling system is required to be effective.

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  • Magnetotelluric forward method, forward system, storage medium, and electronic device
  • Magnetotelluric forward method, forward system, storage medium, and electronic device
  • Magnetotelluric forward method, forward system, storage medium, and electronic device

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Embodiment Construction

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0041] At present, most of the magnetotelluric forward modeling systems are established based on the assumption that the earth medium is isotropic, and there are many researches and applications. Due to the influence of various macro and micro factors, such as the earth's tectonic stress field, the deformation zone of the earth's medium, and the orientation of crystals, the anisotropy of the earth's medium exists objectively. For example, rocks in nature have different degrees of anisotropy , so the assumption that the earth medium is isotropic has limited explanatory power.

[0042] For magnetotellurics, the scale of anisotropic rock structure can be micron-scale minerals and rock fabrics, or mineral veins arranged periodically from tens to hundreds of meters or wa...

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Abstract

The application provides a magnetotelluric forward method, a forward system, a storage medium, and an electronic device. The method includes: determining a calculation area, wherein the calculation area includes an anomalous body area; dividing the calculation area into multiple units; obtaining a conductivity tensor and a permeability tensor of each unit, wherein a conductivity and a permeabilityin the anomalous body area are different from those in calculation areas except the anomalous body area in the calculation area; and further determining an electric field and a magnetic field of thecalculation area, thereby determining an apparent resistivity and a phase of the earth surface in the calculation area. The impact of anisotropy of the conductivity and the permeability on a magnetotelluric response can be quantitatively analyzed by considering the anisotropy of the conductivity and the permeability in the magnetotelluric forward method. In addition, the forward system applying the forward method is more applicable to an actual magnetotelluric response, can provide a basis for anisotropy inversion of three-dimensional magnetotelluric conductivity and permeability, and therefore can have a wider application scope.

Description

technical field [0001] The present application relates to the field of exploration geophysics, for example, it relates to a forward modeling method of magnetotellurics, a forward modeling system, a storage medium and electronic equipment. Background technique [0002] As an important geophysical method, the magnetotelluric method has been widely used in the detection of the earth's internal structure, mineral resource exploration, and groundwater resource search. At present, it is usually through inversion to continuously carry out data simulation on the observed data of magnetotellurics, so as to obtain the electrical structure of the underground medium. However, based on the existing forward modeling system, its application range is relatively narrow when the inversion based on the forward modeling system is required to have certain validity. Contents of the invention [0003] In view of this, the purpose of this application is to provide a magnetotelluric forward model...

Claims

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Application Information

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IPC IPC(8): G01V3/08G01V3/38
CPCG01V3/081G01V3/38
Inventor 肖调杰王赟李红谊景建恩
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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