Couple source frequency domain electric sounding method and apparatus suitable for quasi far zone

Abstract

The invention relates to an electric dipole frequency domain electrical sounding method and a device suitable for quasi far field. The method comprises the following steps of : arranging transmission of power supply in a specified exploration region; transmitting power generated by the power supply to a multi-frequency current transmitter, which generates a current containing n main frequency components and transmits the current to the ground through a transmitting electrode; arranging receiving electrodes in a selected transmitting-receiving distance and measuring the transmitting-receiving distance r; transmitting ground-generated voltage response containing electric distribution information into a multi-frequency voltage receiver through a receiving electrode, measuring the voltage response containing n main frequency components from the ground by the receiver through the receiving electrode, d by the invention, etc. The invention also includes a relevant device. The invention has the advantages of simple instrument equipment and easy measurement procedure, and requires no measurement for quasi far field. The invention is suitable for sounding underground geological structure, mineral distribution, etc. in quasi far field.

Description

technical field [0001] The invention relates to a detection method and device in the field of prospecting geophysics, in particular, to a quasi-far field (Quasi Far Field, pointing to sending-receiving distance r=3δ→ 7δ area, where δ is the skin depth of electromagnetic waves), which is used to find out the underground geological structure and mineral distribution characteristics, or to solve other engineering, hydrological and environmental geology problems. The artificial source frequency domain electric sounding method and device. Background technique [0002] In the field of exploration geophysics, there are two existing artificial source frequency domain electric (magnetic) sounding methods: one is the Controlled Source Audio-frequency Magnetotellurics method (CSAMT method-Controlled Source Audio-frequency Magneto-Tellurics), the other is One is the frequency sounding method (FS method-Frequency Sounding). The controlled source audio magnetotelluric sounding method nee...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the existing CSAMT method and FS method, and provide a method and device for electric sounding in the frequency domain of galvanic source frequency domain with high efficiency, high observation accuracy and simple equipment.

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