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Multi-electrode system detection method for finding inter-well target body

A detection method and target volume technology, applied in the field of geophysical exploration, can solve problems such as limited data amount, and achieve the effect of reducing multiple solutions, improving exploration efficiency, and improving detection effect.

Active Publication Date: 2019-08-30
CENT SOUTH UNIV
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Problems solved by technology

Assuming that there are two boreholes in a certain prospecting area, adopt the data acquisition method of power supply in one borehole and measurement in the other borehole, and move down the power supply electrode pair and the measurement electrode pair synchronously after each data collection, so that the collected Very limited amount of data

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  • Multi-electrode system detection method for finding inter-well target body
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  • Multi-electrode system detection method for finding inter-well target body

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Embodiment 1

[0048] figure 1 Low-resistivity and high-polarization banded orebodies exist in the underground hidden rock mass in the Assuming that the underground space is a uniform space, the resistivity is 100Ω·m, and the polarizability is 2%. 10%, as shown in (b).

[0049] Assume that there are two boreholes located in the same plane in the exploration area, numbered P and Q, and the borehole spacing is 60 meters.

[0050] The specific operation of a multi-electrode system detection method for finding an interwell target is as follows:

[0051] (1) Based on the existing two boreholes with the same depth in the survey area, select point distance c=8 meters to arrange measuring points in each borehole (such as figure 2 );

[0052] (2) According to the distribution characteristics of the longitudinal scale of the target, select the electrode spacing d = 8 meters and arrange a pair of power supply electrodes AB and 11 pairs of measuring electrodes M in the two boreholes i N j (i,j=1,...

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Abstract

The invention provides a multi-electrode system detection method for finding an inter-well target body. The method comprises the following steps of (1) arranging a pair of power supply electrodes in two drilling holes for power supply based on the two drilling holes of an exploration area, acquiring potential signals of a plurality of pairs of measuring electrodes by virtue of a multichannel electrical prospecting and receiving system, and converting the collected potential signals into apparent resistivity and apparent polarizability parameters; and (2) performing inter-well two-dimensional combined inversion imaging on the apparent resistivity and apparent polarizability data, and comprehensively utilizing an inversion imaging result of the resistivity and the polarizability to analyze spatial distribution morphology of the target body in order to achieve a purpose of finding the inter-well target body. The method can overcome the defect that the observation information amount of a conventional inter-well induced polarization method is small, the multiplicity of single parameter inversion can also be reduced through the combined inversion imaging of the inter-well resistivity andthe polarizability, and the detection effect of the inter-well induced polarization method can be improved.

Description

technical field [0001] The invention relates to the field of geophysical prospecting, in particular to a multi-electrode detection method for searching interwell targets. Background technique [0002] With the rapid development of society, the shallow mineral deposits that are easy to develop in our country are increasingly exhausted, and many mines are facing bankruptcy. Therefore, it is urgent to carry out deep ore prospecting, strengthen the re-exploration of old mines, and speed up the geophysical exploration methods to find hidden mineral deposits in the deep edge, which has great theoretical and practical significance. The borehole induced polarization method is an extended application of the common surface induced polarization method in the borehole. The field source or measurement device is arranged deep underground with the help of the borehole, so that it is close to the exploration target. The ability to hide ore bodies is stronger. [0003] At present, the main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/20G01V3/34
CPCG01V3/20G01V3/34
Inventor 刘海飞汪强强
Owner CENT SOUTH UNIV
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