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Quick identification method and device for two-parameter time domain electromagnetic weak polarization effect

A polarization effect, time-domain electromagnetic technology, which is used in electric/magnetic exploration, measurement devices, and re-radiation of sound waves, etc., can solve problems such as unfavorable underground polarization information grasping and no consideration of weak polarization polarization geological conditions. , to achieve the effect of reducing exploration cost, fast and accurate identification, and improving accuracy

Pending Publication Date: 2020-03-24
JILIN UNIV
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Problems solved by technology

However, in this method, the selected standard curves are all strongly polarized and have negative response values, and the polarization geological conditions with weak polarization and no negative response values ​​are not considered, which is not conducive to comprehensive underground polarization information. Therefore, it is necessary to design a method and device that can quickly and accurately identify weak polarization effects

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  • Quick identification method and device for two-parameter time domain electromagnetic weak polarization effect
  • Quick identification method and device for two-parameter time domain electromagnetic weak polarization effect
  • Quick identification method and device for two-parameter time domain electromagnetic weak polarization effect

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Embodiment

[0091] The present invention provides a quick identification method of double-parameter time-domain electromagnetic weak polarization effect, such as figure 1 shown, including the following steps:

[0092] S1. Refer to the actual range of polarization parameters in geological data, including conductivity, polarizability, time constant, and dispersion coefficient, and set the uniform ground without polarization, uniform ground with polarization, layered ground with polarization, and uniform ground without polarity 250 groups of three-dimensional models were optimized, and their electromagnetic response curves were obtained;

[0093] S2. Analyze the electromagnetic response of S1 to obtain the curve characteristics of fast decay and negative response. Around the two polarization characteristics, the extracted characteristic parameters are:

[0094] Three-component magnetic field B x (t), B y (t), B z (t) decay curve negative response duration ΔT x , ΔT y , ΔT z ;

[0095...

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Abstract

The invention relates to a quick identification method and device for a two-parameter time domain electromagnetic weak polarization effect, and aims at solving the problems that weak polarization response characteristics in time domain electromagnetic detection data are difficult to identify, the interpretation precision is low and the like. Two parameters which have the greatest influence on a polarization identification result are screened; a polarization effect rapid classification model is established based on a support vector machine by taking the parameter with the maximum influence as input and whether polarization occurs or not as output; and rapid identification is carried out on the measured data through a polarization effect rapid classification model. According to the method, the weak polarization response in electromagnetic detection can be quickly and accurately recognized only by extracting the two parameters, and the accuracy of electromagnetic data interpretation is improved.

Description

technical field [0001] The invention relates to a method for identifying polarization effects, in particular to a method and device for quickly identifying double-parameter time-domain electromagnetic weak polarization effects. Background technique [0002] Induced Polarization Effects (Induced Polarization Effects, IP) is an important electrochemical phenomenon, which usually exists in metal ores, disseminated mineral resources and water-bearing geology, and has extremely high economic value, mainly manifested in the rapid attenuation of electromagnetic signals , Sign inversion phenomenon. The method of multi-parameter joint interpretation of geology using polarization data has also been widely used in the search for metal ores, water resources, geothermal resources, karst karst and other wider fields, and has become a research hotspot for scholars at home and abroad. However, as to whether the unknown geological structure has polarization characteristics, the conclusion i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08
CPCG01V3/08
Inventor 嵇艳鞠吴燕琪邵晶雅马彬原于一兵王远栾卉
Owner JILIN UNIV
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