A 4D Resistivity Inversion Method Based on Dynamic Adjustment of Data Weight

A technology of dynamic adjustment and weight value, which is applied in electric/magnetic exploration, sound wave reradiation, radio wave measurement system, etc., can solve the problems of long lag in result interpretation and not being maximized, and achieve good results The effect of inverting an image

Active Publication Date: 2019-02-26
SHANDONG UNIV
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Problems solved by technology

The computing efficiency of the current computer or server has been greatly improved. The time-consuming of collecting data is greater than the time-consuming of inversion calculation. The advantages of fast inversion calculation have not been maximized, resulting in a long lag in the interpretation of results.
[0005] Second, in the monitored area, the time when the underground medium changes is uncertain, especially the rapid changes in the medium will cause drastic changes in the observed data, which will affect the stability of the inversion. It is difficult for general methods to use the effective information contained in the latest observation data to Responding to Transient Exceptions

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  • A 4D Resistivity Inversion Method Based on Dynamic Adjustment of Data Weight
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  • A 4D Resistivity Inversion Method Based on Dynamic Adjustment of Data Weight

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[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0035] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention discloses a four-dimensional resistivity inversion method based on dynamic adjustment of data weight values. The method includes the steps that resistance / potential difference / apparent resistivity obtained in a collecting process constitute a data set, the collected complete data set is equally divided into multiple parts, and the divided small parts of data are recombined to obtaina recombined data set; a four-dimensional resistivity inversion objective function based on dynamic adjustment of the data weight values is constructed, an appropriate data weight matrix is selected,a model parameter increment vector is solved, and a final inversion result is obtained after iterative inversion.

Description

technical field [0001] The invention relates to a four-dimensional resistivity inversion method based on dynamically adjusting data weight values. Background technique [0002] Four-dimensional resistivity tomography can be used to characterize the dynamic processes taking place on the Earth's surface. The technique captures time-dependent changes in conductivity to invert and resolve spatial property changes associated with the monitored process. In recent years, it has been widely used in environmental monitoring, engineering construction and hydrogeophysical research and other fields. However, it takes time to acquire and process data. For the process of transient changes, the collected data often correspond to multiple stages of subsurface resistivity structure. Complex and chaotic data leads to a decrease in the accuracy and resolution of the inversion image. Therefore, it is crucial to improve the inversion quality. [0003] The four-dimensional resistivity inversio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 刘征宇庞永昊刘沈华王宁刘斌范克睿王静徐辉张崇民
Owner SHANDONG UNIV
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