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Frequency domain visco-acoustic medium full waveform inversion method

A technology for full waveform inversion and visco-acoustic medium, applied in the field of seismic exploration

Inactive Publication Date: 2018-12-21
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Description
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Problems solved by technology

Although domestic scholars have made useful attempts and achieved certain results in the inversion of viscoacoustic media, in general, the full waveform inversion method for viscoacoustic media at home and abroad is still in its infancy.

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Embodiment Construction

[0047] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following technical solutions in the present invention are clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0048] The inventive idea of ​​the present invention is: introducing the parameterization mode of the formation absorption coefficient, introducing the quality factor Q, and establishing the viscoacoustic medium wave equation. Based on the forward modeling in the frequency domain, combined with the model, the trial calculation of the two-parameter joint inversion is carried out, and an optimization method is proposed. The truncated Newton method is used in the con...

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Abstract

The invention provides a frequency domain visco-acoustic medium full waveform inversion method, which comprises the steps of using a truncated Newton method to perform a joint inversion on velocity and a Q value, and selecting an optimized hybrid interleaving difference format to discretize a wave equation. The method of the invention improves the artifact phenomenon and improves the effect and efficiency of the joint inversion.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a full waveform inversion method for viscoacoustic media in the frequency domain. Background technique [0002] There are relatively few researches at home and abroad on the joint inversion of formation Q value (or absorption coefficient) and velocity. Tarantola (1988) first deduced the theoretical basis for the joint inversion of absorption coefficient and velocity in viscoelastic media, and pointed out that the model can be updated through the cross-correlation between the forward propagating wave field and the backward propagating wave field. Liao and McMechan (1996) implemented the algorithm in the frequency domain and did a simple model test. Causse et al. (1999) proposed a preconditioning method for viscoacoustic media to compensate for the effects of dispersion and amplitude attenuation on the inversion results of the gradient method. Malinowski et al. (2011)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 张敏周斯琛李振春高萌伟李承洲
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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