Transient electromagnetic auxiliary interpretation method based on mathematical statistics

Abstract

The invention discloses a transient electromagnetic auxiliary interpretation method based on mathematical statistics, which is applied to the field of electromagnetic exploration and comprises the following steps of: S1, carrying out regression fitting of data, specifically, carrying out fitting correction on inversion apparent resistivity data based on linear, quadratic or cubic polynomial fitting; S2, comparing fitting results of various regression equations with an original graph, and selecting regression fitting results suitable for each region to carry out auxiliary interpretation; and S3, carrying out normal distribution analysis, specifically, combining normal distribution analysis with hydrogeological data and previous working experience, using an interval segmentation value of normal distribution as the reference basis of relative water-rich area division in different water-containing stratums, and conducting electrical method auxiliary interpretation. According to the transient electromagnetic auxiliary interpretation method, the data is corrected by using a regression fitting trend surface method, the normal distribution empirical rule of each work area is summarized to judge and classify abnormal values in the electrical method data by using the features of normal distribution, manual interpretation errors are reduced, and a more scientific, more objective and more persuasive conclusion is obtained.

Description

technical field [0001] The invention relates to the field of electromagnetic exploration, in particular to a transient electromagnetic auxiliary interpretation method based on mathematical statistics. Background technique [0002] Transient electromagnetic survey is greatly affected by terrain and external electromagnetic interference during the construction process. Although relevant production technical measures will be taken during the construction process and technical means such as filtering and correction will be adopted in the later data processing, these effects cannot be eliminated. , this will cause the abnormal areas in the interpretation results to be mainly distributed near the above-mentioned interference range, and the determination of abnormal values ​​in the whole area can only be carried out by division and classification, which will bring great troubles to the later data interpretation and affect the accuracy of interpretation. [0003] In the process of q...

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Problems solved by technology

[0002] Transient electromagnetic survey is greatly affected by terrain and external electromagnetic interference during the construction process. Although relevant production technical measures will be taken during the construction process and technical means such as filtering and correction will be adopted in the later data processing, these effects cannot be eliminated. , this will cause the abnormal areas in the interpretation results to be mainly distributed in the vicinity of the above-mentioned interference range, and the determination of the abnormal values ​​in the whole area can only be carried out by division and classification, which will bring great troubles to the later data interpretation and affect the accuracy of interpretation

[0003] In the process of qualitative and semi-quantitative interpretation, the abnormal threshold value of each target layer is generally determined based on the hydrogeological conditions of the exploration area and the current status of underground mining. As a result, there is no relevant reference basis for qualitative and semi-quantitative interpretation. At the same time, different technicians have different cognitions on the exploration area, which makes the interpretation results of different technical personnel in areas with less data have certain differences, and the interpretation accuracy is low, which affects the interpretation results. reliability

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