Active source electrical prospecting method based on passive source electric field signal measurement

A technology of electrical prospecting and signal measurement, applied in the field of active source electrical prospecting based on passive source electric field signal measurement, can solve the problems of reducing the scope of application of electrical prospecting and low signal-to-noise ratio of data

Inactive Publication Date: 2020-03-24
CENT SOUTH UNIV
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Problems solved by technology

With the strengthening of human activities, the human electromagnetic interference in the electrical prospecting area is getting stronger and stronger. Sometimes the intensity of human electromagnetic interference is higher than the signal intensity emitted by the electrical prospecting transmitter, which leads to the failure of electrical prospecting in some exploration areas. Difficult to conduct or obtain data with low signal-to-noise ratios, reducing the scope of electrical surveying

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  • Active source electrical prospecting method based on passive source electric field signal measurement
  • Active source electrical prospecting method based on passive source electric field signal measurement

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Embodiment Construction

[0014] Refer to the following figure 1 , figure 2 , The present invention will be further described in conjunction with specific embodiments.

[0015] Step a: Determine the exploration area, arrange frequency-domain passive source electric field signal measurement equipment at key points of interest in the exploration area, detect or monitor passive source electric field signals of various frequencies in the exploration area, and obtain different frequency signals in the exploration area Potential difference and frequency value; in order to improve detection or monitoring efficiency, set the frequency difference between adjacent frequencies of the passive source electric field signal measurement equipment to 2 times the frequency, such as setting the minimum frequency to 0.125 Hz, according to the frequency difference of 2 times the frequency, select 14 frequency values ​​(such as 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024 Hz), measure the potential differ...

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Abstract

The invention discloses an active source electrical prospecting method based on passive source electric field signal measurement. According to the method, by observing the characteristics of a passivesource electric field signal in an exploration area, such as the frequency, the intensity, etc., the weak frequency of the passive source electric field signal is selected to send an active source signal, and a receiver receives an electric field signal transmitted by the active source signal through the underground, so that the electric field data with higher quality is obtained, and the electrical prospecting with a better exploration effect is realized. The method has the characteristics of high data quality, high signal-to-noise ratio, good exploration effect and the like, and can indirectly improve the exploration efficiency and reduce the exploration cost.

Description

technical field [0001] The invention relates to a new electrical prospecting method in the field of prospecting geophysics. Background technique [0002] The current frequency-domain electrical prospecting method generally transmits signals based on the frequency value of the transmitter of electrical prospecting, and the receiver performs signal measurement on the survey point based on the frequency value sent by the transmitter, without considering the human electromagnetic field in the exploration area. Interfering with characteristics such as signal strength and frequency. With the strengthening of human activities, the human electromagnetic interference in the electrical prospecting area is getting stronger and stronger. Sometimes the intensity of human electromagnetic interference is higher than the signal intensity emitted by the electrical prospecting transmitter, which leads to the failure of electrical prospecting in some exploration areas. Data that are difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08
CPCG01V3/08
Inventor 刘春明刘嵘唐冬春陈儒军汪衡珍王贵财曹创华周炜鉴
Owner CENT SOUTH UNIV
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