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Aeromagnetic data leveling method

A data and aeromagnetic technology, applied in the field of geophysical resource exploration, can solve the problems of many parameters and difficult to control, and achieve the effect of good leveling effect

Inactive Publication Date: 2015-11-18
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for leveling aeromagnetic data based on overall average empirical mode decomposition (EEMD), which solves the problem that existing leveling methods and software usually have many parameters, are difficult to control, and require relevant geophysical knowledge and leveling experienced people operating problems

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Embodiment approach

[0026] According to an embodiment of the present invention, the aeromagnetic data leveling method includes:

[0027] S1, along the direction of the survey line, perform overall average empirical mode decomposition on each survey line in the original aeromagnetic data to obtain m sub-data blocks, where m is an integer greater than or equal to 1;

[0028] S2, along the direction of crossing the survey line, perform overall average empirical mode decomposition (EEMD) on each of the m sub-data blocks to obtain m×n sub-data blocks, wherein n is an integer greater than or equal to 1;

[0029] S3, performing graph analysis on the m×n sub-data blocks, and finding out the interfering sub-data blocks from the graph;

[0030] S4, remove the interfering sub-data blocks, and add the rest of the sub-data blocks to obtain the leveled aeromagnetic data.

[0031] According to an embodiment of the present invention, before step S1, it also includes S0: performing hysteresis correction on the o...

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Abstract

The invention discloses an aeromagnetic data leveling method, which comprises the steps of carrying out overall average empirical mode decomposition on aeromagnetic data along a survey line direction and a survey line crossing direction successively so as to acquire a plurality of sub data blocks, then finding an interference sub data block in the plurality of sub data blocks and removing the interference sub data block, and adding the rest of the sub data blocks so as to acquire leveled aeromagnetic data. According to the method, a leveling error is found through visual operations, auxiliary data is not required in the whole process, and the data can be decomposed, screened and mapped automatically, thereby solving a problem that an existing leveling method and software are generally multiple in parameter and difficult to control and need people possessing geophysical knowledge and leveling experience to operate.

Description

technical field [0001] The invention relates to the field of geophysical resource exploration, in particular to an aeromagnetic data leveling method based on overall average empirical mode decomposition (EEMD). Background technique [0002] Aeromagnetic surveying is a geophysical method that loads an airborne magnetometer and its supporting auxiliary equipment on an aircraft, and measures the strength or gradient of the geomagnetic field over the measurement area according to a preset survey line and altitude. Compared with ground magnetic surveying, it has higher measurement efficiency and is not limited by water areas, forests, deserts and mountains. At the same time, because the flight is carried out at a certain height from the earth's surface, the influence of the magnetic inhomogeneity on the earth's surface is weakened, and the magnetic field characteristics of deep geological bodies can be reflected more clearly. [0003] Aeromagnetic data leveling is an important p...

Claims

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Application Information

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IPC IPC(8): G01V3/40G01V3/38
Inventor 黄玲范振峰张晓娟方广有
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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