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Geological Structure Location Delineation Method Based on Gradient Tensor Eigenvalues ​​of Potential Field Data

A gradient tensor and geological structure technology, applied in geophysical surveying, instruments, etc., can solve the problems of false boundary positions and low precision, and achieve the effects of avoiding false boundary positions, high spatial resolution and accuracy, and improving reliability

Active Publication Date: 2021-12-31
JILIN UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Now there are a lot of literature and work on the delineation method of geological structure position. Under certain assumptions, a good horizontal position delineation effect of geological structure is obtained, but false boundary positions will be generated in the processing of multi-geological body space superposition anomalies , low precision and other issues

Method used

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  • Geological Structure Location Delineation Method Based on Gradient Tensor Eigenvalues ​​of Potential Field Data
  • Geological Structure Location Delineation Method Based on Gradient Tensor Eigenvalues ​​of Potential Field Data
  • Geological Structure Location Delineation Method Based on Gradient Tensor Eigenvalues ​​of Potential Field Data

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Embodiment

[0045] Taking the measured potential field anomaly data in a certain area in Jilin as an example, the spatial distribution of fault structures is determined by the method of delineating the geological structure position of the potential field data based on the gradient tensor eigenvalues. Among them, figure 2 An anomaly map of the measured potential field data in this area.

[0046] Specific steps are as follows:

[0047] S1: Obtain the measured potential field data in this area, use the anomaly stripping method based on upward continuation to realize the anomaly separation of the regional field and the local field, and use the space domain-frequency domain derivative calculation method and the Laplace equation to calculate the gradient component G xx , G xy , G xz , G yx , G yy , G yz , G zx , G zy , G zz ;

[0048] S2: Using the gradient component to establish a gradient tensor matrix G, wherein the gradient tensor matrix G is as shown in formula (1):

[0049]

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Abstract

The invention discloses a method for delineating geological structure positions of potential field data based on gradient tensor eigenvalues. Separating the abnormality, and calculating the gradient component using the space-frequency domain derivative calculation method and the Laplace equation; S2: using the gradient component to establish a gradient tensor matrix; S3: calculating the eigenvalue of the gradient tensor matrix; S4 : using the feature value to define a method for delineating the location of the geological structure. The method for delineating geological structure positions based on gradient tensor eigenvalues ​​of potential field data has higher horizontal resolution, and the delineated fault structures are clearer, which can effectively delineate the corresponding boundary positions of deep and shallow geological structures, and improve the geological structure. Explain precision.

Description

technical field [0001] The invention relates to the field of earth science technology, and in particular provides a method for delineating geological structure positions based on gradient tensor eigenvalues ​​of potential field data. Background technique [0002] Potential field data has a higher horizontal resolution than other geophysical measurement data, and has been widely used in the division of geological structures in marine and land regions, providing an important means for delineating regional structural positions and identifying faults. Establishing a high-precision geological structure position delineation method based on potential field data can better serve the exploration of marine and land resources, and further guide the fine exploration and interpretation of other geophysical methods. Now there are a lot of literature and work on the delineation method of geological structure position. Under certain assumptions, a good horizontal position delineation effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V9/00
CPCG01V9/00
Inventor 周帅高妍荣骏召王利杰焦健管彦武
Owner JILIN UNIV