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Method for calculating buried depth of underground magnetic body

A calculation method and magnetic technology, which are applied in the field of geophysical exploration and development, can solve the problems that cannot be obtained at equal intervals, the depth of the magnetic body cannot be directly carried out, and the feature points of the tangent method cannot be directly found, etc., so as to achieve simple operation and calculation accuracy. high effect

Inactive Publication Date: 2017-12-22
YANGTZE UNIVERSITY
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Problems solved by technology

[0004] 1. Field magnetic surveys often cannot obtain the magnetic field values ​​of the sampling points strictly along the survey line and at equal intervals according to the design requirements, while the spatial domain extends upward and downward to process the magnetic survey data, and the sampling points need to be on the survey line, etc. spacing
[0005] 2. After various corrections (daily change correction, normal field correction, height correction, and latitude correction) are performed on the field magnetic survey data, the outliers appear jagged on the profile, and it is impossible to directly find the feature points required by the tangent method;
[0007] The above three problems make it impossible to directly calculate the burial depth of magnetic bodies by the tangent method.

Method used

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  • Method for calculating buried depth of underground magnetic body
  • Method for calculating buried depth of underground magnetic body
  • Method for calculating buried depth of underground magnetic body

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Embodiment Construction

[0044] In order to better explain the present invention, the main content of the present invention is further clarified below in conjunction with specific examples, but the content of the present invention is not limited to the following examples.

[0045] Due to the influence of terrain fluctuations, especially the complex surface conditions and high and steep structural strata in a certain area in southern my country, field ground magnetic surveys cannot be carried out strictly in accordance with the design requirements. The following methods are used to calculate the buried depth of underground magnetic bodies in this area:

[0046] 1) Sampling point data homing

[0047] Carry out magnetic measurement on the sampling points of the field to be measured, and collect the magnetic measurement data, which is the measured value. The measured value is as follows: figure 1 The distances shown are different, and the measured values ​​are corrected to obtain the measured abnormal val...

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Abstract

The invention discloses a method for calculating the buried depth of an underground magnetic body. The method comprises the following five steps: carrying out sampling point data homing; carrying out curve fitting; carrying out curve smoothing processing; carrying out a feature point of a magnetic abnormal smoothing curve; and calculating a buried depth h of a magnetic body by using a tangent method. According to the invention, treatment and homing are carried out on field magnetic survey data by using a cubic spline method; and a requirement of the equal interval of sampling points at a measuring line during upward and downward extension of a space domain is met. According to the method, the method is operated simply; the calculation precision is high; and the geophysical prospecting worker can carry out magnetic method explanation conveniently.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration and development, in particular to a calculation method for the buried depth of an underground magnetic body. Background technique [0002] Magnetic prospecting is to determine the characteristics of the corresponding underground field source through the spatial distribution characteristics of the known magnetic field on the ground or above the ground, such as determining the spatial location, geometric parameters, shape, and occurrence of magnetic bodies, which have been widely used in solid Research on minerals (such as magnetite, copper-nickel ore, lead-zinc ore), oil and gas structures, and deep, regional, and global structures is an important link to solve practical problems such as various geological exploration. [0003] The tangent method is a method to obtain the occurrence elements of underground magnetic bodies by using the relationship between the tangent coordinates of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08
CPCG01V3/081
Inventor 钱文蹈尹太举侯国伟何苗夏敏陈梁陈乐
Owner YANGTZE UNIVERSITY
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