Cross three-dimensional electrical prospecting method

Abstract

The invention discloses a cross three-dimensional electrical prospecting method. According to the method, cross three-dimensional electrical prospecting power supply terminals are arranged based on prospecting target body characteristics and topography and landform fluctuation characteristics of an electrical prospecting area, an electrical prospecting transmitter supplies power to underground through electrodes of the power supply terminals, an electrical prospecting receiver simultaneously receives electric field signals of the power supply terminals, and apparent resistivity and induced polarization parameters of measurement points are calculated when each cross power supply terminal supplies power, so that cross three-dimensional electrical prospecting is achieved. The cross three-dimensional electrical prospecting method can overcome the shortcomings of poor two-dimensional electrical prospecting effect and low conventional three-dimensional electrical prospecting efficiency and inherits the advantages of high two-dimensional electrical prospecting efficiency and good conventional three-dimensional electrical prospecting effect, and a better balance point is found between the prospecting efficiency and the prospecting effect.

Description

technical field [0001] The invention relates to a three-dimensional electrical prospecting method in the field of prospecting geophysics. Background technique [0002] In the field of exploration geophysics, electrical prospecting is divided into one-dimensional, two-dimensional and three-dimensional electrical prospecting. One-dimensional electrical prospecting is basically not used at present due to low exploration precision and poor effect; two-dimensional electrical prospecting is better than one-dimensional in precision and effect, but the exploration efficiency is lower than the latter; conventional three-dimensional electrical prospecting is divided into complete form, The accuracy and effect of the three-dimensional electrical prospecting with cross and Γ-shaped arrangement of measuring electrodes are better than those of one-dimensional and two-dimensional, but the number of power supply points and measurement points is far more than that of one-dimensional and two-...

AI Technical Summary

Problems solved by technology

One-dimensional electrical prospecting is basically not used at present due to low exploration precision and poor effect; two-dimensional electrical prospecting is better than one-dimensional in precision and effect, but the exploration efficiency is lower than the latter; conventional three-dimensional electrical prospecting is divided into complete form, The accuracy and effect of the three-dimensional electrical prospecting with cross and Γ-shaped arrangement of measuring electrodes are better than those of one-dimensional and two-dimensional, but the number of power supply points and measurement points is far more than that of one-dimensional and two-dimensional, which leads to the failure of conventional three-dimensional electrical prospecting. The exploration efficiency is far lower than that of one-dimensional and two-dimensional. Therefore, although this method has a good exploration effect, it is only used in a small amount in some very key exploration areas and the funds are very sufficient.

[0003] Two-dimensional electrical prospecting requires the arrangement of electrical prospecting power supply systems and measurement systems on each prospecting line, and the data of each prospecting line is processed separately as two-dimensional data in the later data processing process. There are real two-dimensional geological anomalies, and more three-dimensional geological anomalies, so the results of two-dimensional electrical exploration are approximate results, resulting in poor exploration results

The amount of data collected by the above two methods is still large, and the efficiency improvement is not obvious

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