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.
CN105549099AInactive Publication Date: 2016-05-04CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Publication Date
2016-05-04
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Claims

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