Electrical sounding method for whole-region couple source frequency domain

Abstract

The invention relates to an electrical sounding method for a whole-region couple source frequency domain, which is used for measuring horizontal electric field components Ey. The electrical sounding method comprises the following steps: (1) arranging a transmission power supply and a power supply dipole; (2) selecting measurement frequency, wherein the sector observation range is as follows: an included angle with a dipole moment direction is 5-85 degrees, and selecting a transmitting and receiving distance dL; arranging a measuring line and a measuring point; (3) arranging and connecting a measurement electrode and a receiver; synchronously measuring the components of the horizontal electric field (Ey) vertical to the dipole moment via multiple paths, and simultaneously recording the measuring point position (relative to the coordinate of the center of the dipole); and (4) storing data and calculating apparent resistivity according to a corresponding formula. The invention is suitable for observing underground electrical distribution in the whole region. Because the invention only needs to measure electric field data on one direction, the invention has wide observation range, high efficiency, low cost and simple equipment, and observed data is slightly affected by static effect. The invention can be used for finding out geologic structure and mineral product distribution or solves the other problems of engineering, hydrology and environment geology.

Description

technical field [0001] The invention relates to an electromagnetic sounding method in the field of surveying geophysics, in particular to a method for measuring the horizontal electric field component E y An all-area galvanic source frequency domain electrical sounding method. Background technique [0002] In the field of reconnaissance geophysical electromagnetic method, there are many methods of electromagnetic field measurement and apparent resistivity calculation, but there are still some defects and deficiencies. For example, the existing Controlled Source Audio-frequency Magnetotelluric (CSAMT) method needs to measure a set of mutually orthogonal electric, Magnetic field horizontal component E x 、H y (or E y 、H x ), by calculating the ratio of the two (called the impedance) Z xy =E xy / H y (or Z yx =E y / H x ), and then obtain the subsurface apparent resistivity distribution (or ), to achieve the purpose of ascertaining the distribution characteristics o...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcoming of above-mentioned existing CSAMT method, the object of the present invention is to provide a kind of new electric sounding method of electric couple source frequency domain of whole region

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