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Tomographic Enhancement Method for 3D Data Based on Curved Gabor Filter

A three-dimensional data and fault technology, applied in seismic signal processing and other directions, can solve the problems of lack of texture features, insufficient contrast, small response, etc., to achieve the effect of enhancing fault details, adding useful information, and simplifying the amount of calculation.

Active Publication Date: 2020-04-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

At the same time, areas where there are no faults are often full of background noise, so there is no obvious texture feature, the contrast is not enough, and there is usually a small response after filtering

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  • Tomographic Enhancement Method for 3D Data Based on Curved Gabor Filter
  • Tomographic Enhancement Method for 3D Data Based on Curved Gabor Filter
  • Tomographic Enhancement Method for 3D Data Based on Curved Gabor Filter

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[0045] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0046] Such as figure 2 Shown is the scheme flowchart of the present application, the technical scheme of the present application is: first carry out structure-guided filtering noise reduction to the original three-dimensional seismic amplitude data volume, and coherent volume calculation based on GST (gradient structure tensor) azimuth angle, obtain the A coherent attribute body that fully reflects the structural characteristics of the geological body itself. Next, the tomographic enhancement based on the curved Gabor filter is performed on the coherent volume; specifically, it includes:

[0047] S1. Construct a second-order tensor according to the coherent body corresponding to the current pixel;

[0048] S2. Perform eigenvalue decomposition...

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Abstract

The invention discloses a three-dimensional data fault enhancement method based on curved Gabor filtering, which is applied in the field of seismic data processing. Firstly, the original three-dimensional seismic amplitude data volume is subjected to structure-guided filtering and noise reduction, and coherent volume calculation based on gradient structure tensor azimuth angle , to obtain a coherent attribute body that can fully reflect the structural characteristics of the geological body itself; then use the improved curve Gabor filter algorithm to process the coherent body, so that the large fault structure in the original coherent body becomes clearer; suppress the noise in the background and make the Small fault details have been significantly enhanced.

Description

technical field [0001] The invention belongs to the field of seismic data processing, in particular to a seismic fault extraction and enhancement technology. Background technique [0002] A fault is a structure in which the crust is fractured by force, and the rock blocks on both sides of the fracture surface undergo significant relative displacement. Accurate characterization of faults runs through the entire process of oil and gas field development. Reliable fault extraction technology can bring huge economic benefits. The development of fine fault extraction and enhancement technology has become an urgent requirement of the exploration situation. Fault extraction is a relatively complicated process, but in simple terms, the entire process of fault extraction is roughly as follows figure 1 shown. Firstly, the seismic data is preprocessed, the basic interference signals in the data are eliminated, and useful signals are roughly extracted; secondly, some texture attributes...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30G01V1/36
Inventor 钱峰徐敏杰孙小田胡光岷
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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