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Quick full-waveform inversion method for edge guide and structural constraint

A full waveform inversion and structural constraints technology, applied in seismic signal processing and other directions, can solve problems such as model results and boundary damage, edge information and structural information blur

Active Publication Date: 2015-10-21
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0009] In view of this, the main purpose of the present invention is to provide a fast and effective full-waveform inversion method based on canny edge detection operator and bilateral filtering edge guidance and structural constraints, to solve the edge that conventional full-waveform inversion method exists The problem of fuzzy information and structural information, overcome the damage to the model results and boundaries during the denoising process, and enhance the structure and boundary information of the inversion results

Method used

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  • Quick full-waveform inversion method for edge guide and structural constraint
  • Quick full-waveform inversion method for edge guide and structural constraint
  • Quick full-waveform inversion method for edge guide and structural constraint

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Embodiment

[0127] Such as image 3 as shown, image 3 It is a flow chart of a fast method for full waveform inversion based on canny edge detection operator and bilateral filtering edge guidance and structural constraints according to an embodiment of the present invention, and the method includes the following steps:

[0128] First there is an initial velocity model m0:

[0129] The first step is to select the optimal inversion frequency, and read the initial model, inversion parameters and other parameters;

[0130] In the second step, the frequency (group) cycle is performed according to the set inversion frequency; the frequency (group) cycle is an iterative cycle;

[0131] The third step is to enter the iterative loop and read the shot data;

[0132]The fourth step is to use the velocity model and parameter forward modeling, in the frequency domain, to make a difference between the surface reception record and the actual shot record, and calculate the objective function value cor...

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Abstract

The invention discloses a quick full-waveform inversion method for edge guide and structural constraint. The edge of a model is detected by using a canny operator, namely, velocity and interface are inverted at the same time in full-waveform inversion, and then holding structural regularization and structure constraint regularization are carried out on the gradient of residual of the model through bilateral filtering. The problem that the edge information and structure information are fuzzy for a conventional full-waveform inversion method is solved. Moreover, damage to the model result and boundary in the high-noise de-noising process is overcome, and the inversion result structure and boundary information are enhanced.

Description

technical field [0001] The present invention relates to the technical field of seismic imaging and full waveform inversion, especially a fast full waveform inversion method based on canny edge detection operator and bilateral filtering edge guidance and structural constraints, wherein canny edge detection is developed by John F.Canny A multi-level edge detection algorithm developed in 1986. Background technique [0002] The seismic inversion problem is to use the observed seismic data to determine the subsurface structure, which is closely related to the seismic positive problem. According to the information used in the inversion, the inversion methods can be divided into three categories: traveltime inversion, amplitude inversion, and full waveform inversion. The inversion results using the kinematic information of the wave field reflect the macroscopic characteristics of the larger-scale subsurface velocity model. For an ideal observation system, its resolution can reach ...

Claims

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Application Information

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IPC IPC(8): G01V1/28
Inventor 向世明张海江
Owner UNIV OF SCI & TECH OF CHINA
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