Rapid three-dimensional inversion method for transient electromagnetism based on different constraint conditions

A constraint condition and transient electromagnetic technology, which is applied in the field of geophysical exploration technology for underground geological body detection, can solve the problems of large data volume, slow calculation speed, and difficult to put into application, so as to achieve faster calculation, lower data volume, and faster calculation speed Effect

Active Publication Date: 2016-05-18
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the technical problems in the existing 3D inversion methods, such as large amount of data, slow calculation speed, and difficu

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  • Rapid three-dimensional inversion method for transient electromagnetism based on different constraint conditions
  • Rapid three-dimensional inversion method for transient electromagnetism based on different constraint conditions
  • Rapid three-dimensional inversion method for transient electromagnetism based on different constraint conditions

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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directions of the...

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Abstract

The invention provides a rapid three-dimensional inversion method for transient electromagnetism based on different constraint conditions. According to the technical scheme of the invention, the data processing and three-dimensional forward calculation method based on the transient electromagnetic moment inversion is adopted. In this way, the problem that the current three-dimensional inversion is large in data volume and complex in forward calculation can be solved. According to the method, firstly, a constraint condition for a time constant vector during the inversion process is constructed. After that, the iteration on the inversion process is conducted based on the optimization algorithm, so that the inversion process is optimized to be close to an actual underground structure. According to the technical scheme of the invention, based on the above method, the rapid three-dimensional inversion process of an underground abnormal target can be realized by an ordinary computer. Therefore, the method has an important application prospect during the interpretation process of real-time transient electromagnetic data.

Description

technical field [0001] The invention relates to the technical field of underground geological body detection in geophysical prospecting technology, in particular to a transient electromagnetic fast three-dimensional inversion method based on different constraint conditions. Background technique [0002] Transient electromagnetic method uses grounded electrodes or ungrounded return lines to transmit bipolar pulse currents underground, and the induced eddy current in the underground medium under its excitation produces a secondary field that changes with time. During the intermittent period of the primary field, the receiving coil is used to measure The magnetic field signal, through the extraction and analysis of the secondary field signal, achieves the purpose of detecting underground geological bodies. At present, as one of the main non-seismic methods, it is widely used in the exploration of underground resources such as oil, gas and minerals. The inversion and interpreta...

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Application Information

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IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 武欣饶丽婷张晓娟方广有
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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