Non-planar wave identification method and system for controllable source audio magnetotelluric sounding

An audio magnetotelluric and non-plane wave technology, applied in radio wave measurement systems, electrical/magnetic exploration, geophysical measurement, etc., can solve problems such as misinterpretation and high resistance

Inactive Publication Date: 2021-07-23
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the field construction of the CSAMT method is limited by the power of the transmitter, the output current of the transmitter is not enough, and the field strength observed in the far zone must be affected by the plane wave. Therefore, the transition zone and near zone data of non-plane waves are often observed in the CSAMT measu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Non-planar wave identification method and system for controllable source audio magnetotelluric sounding
  • Non-planar wave identification method and system for controllable source audio magnetotelluric sounding
  • Non-planar wave identification method and system for controllable source audio magnetotelluric sounding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Due to the limitation of the transmitter power when the CSAMT method is used in the field, it is impossible to place the transmitting source far away from the receiving point. Generally speaking, the transmitting and receiving distance is 4-6 times the detection depth. In actual work, 30kw The maximum transmitting and receiving distance of the transmitter is 8-15km, so that the non-plane wave data will be collected, and the non-plane wave data includes the data of the transition zone and the near zone.

[0054] Since the distance is limited by the power of the transmitter, the output current of the transmitter is not enough for observation in the far area, so the transition area and near-area data are often observed during CSAMT measurement, and then the non-plane wave data must be correctly divided in data processing , remove it to use MT inversion software for inversion.

[0055] The present invention first designs multiple two-layer and four-layer simulations accordi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a non-planar wave identification method and system for controllable source audio magnetotelluric sounding. The method comprises the following steps: performing forward modeling on a two-layer model and a four-layer model in a uniform half-space model to obtain CSAMT observation data; comparing the data curve observed by the CSAMT corresponding to each model with the data curve corresponding to the MT; determining the reaction of the CSAMT observed data curve corresponding to each model to the shallow stratum, and further determining the change form of the observed data along with the frequency; and identifying the non-plane wave according to the relationship between the change form of the observed data corresponding to each model along with the frequency and the response of the non-plane wave. According to the method, the transition region and the near region of the non-plane wave can be correctly identified and divided, and a correct inversion result is obtained.

Description

technical field [0001] The invention relates to the field of geophysical electromagnetic detection, in particular to a non-plane wave identification method and system for controllable source audio frequency magnetotelluric sounding. Background technique [0002] Controlled source audio frequency magnetotelluric method (CSAMT) is an artificial source frequency domain electromagnetic sounding method, which is characterized by artificial field sources to increase the strength of electromagnetic signals, which in turn make up for the shortcomings of natural field sources such as weak signals and difficult observations. It is widely used in mineral census, oil and gas exploration, hydrological environment and other fields. Since the field construction of the CSAMT method is limited by the power of the transmitter, the output current of the transmitter is not enough, and the field strength observed in the far zone must be affected by the plane wave. Therefore, the transition zone ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01V3/08
CPCG01V3/083G01V2003/086
Inventor 雷达付长民任浩
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap