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Three-dimensional frequency domain controllable source electromagnetic forward modeling method and system

A frequency domain, forward modeling technology, applied in the field of exploration geophysics, which can solve problems such as limited application scope

Inactive Publication Date: 2020-11-17
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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Problems solved by technology

However, the current forward modeling method and forward modeling system have a limited application range, and the inversion of subsurface media with complex electromagnetic responses based on the existing forward modeling system is difficult to be effectively applied in more complex environments

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  • Three-dimensional frequency domain controllable source electromagnetic forward modeling method and system
  • Three-dimensional frequency domain controllable source electromagnetic forward modeling method and system
  • Three-dimensional frequency domain controllable source electromagnetic forward modeling method and system

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Embodiment Construction

[0036] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0037] In the application of frequency domain controllable source electromagnetic method in actual survey, since the strength of the emission source is significantly enhanced compared with the signal strength of natural field sources, the exploration resolution ability for the target object is improved, and the time required for observing the electromagnetic field value is greatly reduced, so This method has higher production efficiency. However, most of the current frequency-domain controlled source electromagnetic forward modeling systems are established based on the assumption that the earth medium is isotropic, such as the forward modeling system based on the controlled source audio magnetotelluric The forward modeling system of the law, etc.

[0038] Due to the influence of various macro and m...

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Abstract

The invention provides a forward modeling method and system of three-dimensional frequency domain controllable source electromagnetism, a storage medium and an electronic device. The method comprisesthe steps of: determining a simulation area, and dividing the simulation area into a plurality of units; obtaining a conductivity tensor and a magnetic conductivity tensor of each unit; determining anelectric field of a primary field in the simulation area; determining the electric field of a secondary field in the simulation area according to the electric field of the primary field, the conductivity tensor and the magnetic conductivity tensor in the simulation area; further determining the electric field and a magnetic field of the simulation area; and accordingly determining apparent resistivity and a phase at a ground surface in the simulation area. By considering the anisotropy of conductivity and magnetic conductivity in the forward modeling method of the three-dimensional frequencydomain controllable source electromagnetic method, the influence of the anisotropy of the conductivity and the magnetic conductivity on the three-dimensional frequency domain controllable source electromagnetic response can be quantitatively analyzed, which is more beneficial to more accurately understanding and analyzing the electromagnetic response of complex geological structures in practice, so the forward modeling method and system are suitable for more types of geological structures and have a wider application field.

Description

technical field [0001] The present application relates to the field of exploration geophysics, in particular, to a three-dimensional frequency domain controllable source electromagnetic forward modeling method, system, storage medium and electronic equipment. Background technique [0002] The frequency-domain controlled source electromagnetic method is a very important geophysical method, which has the advantages of strong lateral resolution, high work efficiency and high signal-to-noise ratio. In actual exploration, data simulation is usually performed on the observed data to determine the electrical structure of the subsurface medium. However, the current forward modeling method and forward modeling system have a limited application range, and the inversion of subsurface media with complex electromagnetic responses based on the existing forward modeling system is difficult to be effectively applied in more complex environments. Contents of the invention [0003] The pur...

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Application Information

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