Low resistance object explaining and imaging method and system based on reflection coefficient analysis

Abstract

The invention provides a low resistance object explaining and imaging method and system based on reflection coefficient analysis. The method comprises the steps of simulating a formation condition tobe analyzed, setting a measuring line length and an electrode distance matched with each other by using a plurality of electrode arrangement modes, building a formation model, and collecting electrical prospecting data of an area to be detected; inverting the prospecting data, finely gridding original data acquired by inversion and using a Kriging method interpolation to image the grid data, and extracting the coordinate value and resistivity value of a grid node in a longitudinal direction of the center position of a low resistance object; computing the reflection coefficient of the extracteddata and normalizing the same, building a function of an amplification index and a depth value, computing the amplification index power of the reflection coefficient to serve as an influence value, drawing a relation curve of the influence value and the depth value, according to the waveform of the relation curve and the depth coordinate of a peak value, comparing original model data, and correcting the function; and adjusting a model parameter, and repeating the above-mentioned steps until the relation curve expresses the depth value of the low resistance body interface in the formation.

Description

technical field [0001] The disclosure belongs to the field of geotechnical exploration, and relates to a low-resistance body interpretation and imaging method and system based on reflection coefficient analysis. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] In near-surface geological exploration and investigation, various geophysical exploration methods are required. Due to the significant difference in the electrical properties of different geological bodies and the mature observation technology, electrical prospecting is a widely used method. Compared with conventional electrical prospecting, high-density electrical prospecting has the advantages of one-time completion of electrode layout, high degree of automation, large amount of collected information, and scanning measurement of various electrode arrangements. [0004] According ...

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Problems solved by technology

[0004] According to the knowledge of the inventor, in the current high-density electrical prospecting work, due to the influence of factors such as the accuracy of inversion results and interpolation grid density, the resolution of the detection results still needs to be improved

For example, the boundaries of low-resistivity anomalies in the formation cannot be accurately identified, which leads

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