Apparent magnetization intensity three-dimensional inversion method based on full-space regularization downward continuation data

A magnetization, full-space technology, applied in the direction of electrical/magnetic detection for logging records, which can solve the problems of low inversion accuracy and limited data.

Inactive Publication Date: 2016-05-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0003] The purpose of the present invention is to provide a three-dimensional inversion method of apparent magnetization based on full-space regularized descending data, which solves the problem of low inversion accuracy due to limited data in the current three-dimensional inversion process

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  • Apparent magnetization intensity three-dimensional inversion method based on full-space regularization downward continuation data
  • Apparent magnetization intensity three-dimensional inversion method based on full-space regularization downward continuation data
  • Apparent magnetization intensity three-dimensional inversion method based on full-space regularization downward continuation data

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Embodiment Construction

[0024] The present invention will be described in detail below in combination with specific embodiments.

[0025] like figure 1 As shown, the present invention proposes a new apparent magnetization inversion method—full-space inversion of apparent magnetization based on the regularization descent method. The core idea of ​​this method is to extend the observed magnetic anomaly field downward to obtain the full space field of the magnetic anomaly within a certain depth, thereby increasing the amount of inversion data; in addition, in the process of downward extension, the magnetic anomaly The field is constantly approaching the field source, which can effectively highlight abnormal signals.

[0026] Obtaining the full space field with higher precision is the key to realizing the present invention, and is the premise of realizing the method of the present invention. However, many potential field extension methods will distort the field value due to the high-frequency oscillati...

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Abstract

The present invention discloses an apparent magnetization intensity three-dimensional inversion method based on full-space regularization downward continuation data. A three-dimensional regularization downward continuation operator is used to realize different depths of continuation to obtain a stable magnetic abnormality full space filed, the minimal value of a target equation is solved, the regularization downward continuation operator is substituted and the positive extension field values of different depths are calculated. A full space field inversion target function is constructed. A multi-dimensional search golden section algorithm is used to solve the minimum value of the inversion target function, and the inversion speed is raised. The method has the advantages that the full depth stable downward continuation is realized, and the full space filed with reliable accuracy can be obtained.

Description

technical field [0001] The invention belongs to the technical field of mathematical three-dimensional models, and relates to a three-dimensional inversion method of apparent magnetization based on full-space regularized descending data. Background technique [0002] The traditional apparent magnetization inversion method is a geophysical method that uses the actual magnetic data collected at the observation surface to reverse the magnetic parameters and spatial occurrence status of underground anomalous bodies. The inversion of the geological body is carried out for grid division, and the apparent magnetization of all grid units is calculated through continuous inversion iterations until the accuracy requirements are met. Although it is easy to find a solution model that satisfies the data fitting space, due to the existence of several factors such as the volume effect of gravity and magnetic field, the limited observation data and the underdetermination of the inversion pro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/28
CPCG01V3/28
Inventor 徐凯军刘展张洪谋
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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