Frequency domain multichannel reflection coefficient joint inversion method and system based on MWV model

A technology of reflection coefficient and joint inversion, applied in the field of seismic exploration of oil and gas fields, can solve the problems of sparsity of damage results and noise immunity

Active Publication Date: 2020-10-30
PETROCHINA CO LTD
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Problems solved by technology

The absence of lateral continuity constraints further undermines the sparsity and noise immunity of the results

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  • Frequency domain multichannel reflection coefficient joint inversion method and system based on MWV model
  • Frequency domain multichannel reflection coefficient joint inversion method and system based on MWV model
  • Frequency domain multichannel reflection coefficient joint inversion method and system based on MWV model

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[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0062] Aiming at the problems of poor noise immunity, low solution accuracy and lack of consideration of lateral continuity in traditional frequency-domain seismic reflection coefficient inversion, the purpose of the present invention is to provide a frequency-domain multi-channel reflection coefficient joint inversion based on the MMV model method. The present invention is proposed on the basis of studying the following problems: 1) the current seismic reflec...

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Abstract

The invention provides a frequency domain multichannel reflection coefficient joint inversion method and system based on an MWV model. The method comprises the steps of acquiring preprocessed post-stack seismic data; acquiring frequency domain multichannel reflection coefficient joint inversion parameter prior information according to the post-stack seismic data; extracting seismic wavelets from the post-stack seismic data; extracting frequency spectrum information of the seismic wavelet based on Fourier transform; constructing a forward operator matrix of frequency domain multichannel reflection coefficient joint inversion according to the frequency domain multichannel reflection coefficient joint inversion parameter prior information; extracting frequency spectrum information of the post-stack seismic data channel by channel through Fourier transform; and constructing an objective function of frequency domain multichannel reflection coefficient joint inversion based on the frequencyspectrum information, and solving the objective function through an MMV model and a block sparse Bayesian learning theory to obtain reflection coefficient model parameters. According to the invention,the precision and stability of the inversion result of the frequency domain reflection coefficient are effectively improved.

Description

technical field [0001] The invention relates to the field of seismic exploration of oil and gas fields, in particular to a frequency domain multi-channel reflection coefficient joint inversion method and system based on an MMV model. Background technique [0002] In the field of exploration and development of oil and gas fields, seismic exploration has always been an important technical means to prove the characteristics of underground oil reservoirs and carry out fine interpretation of reservoirs. Seismic data has the characteristics of wide coverage and strong lateral continuity, and it has irreplaceable advantages in identifying thin subsurface layers, especially the three-dimensional distribution characteristics of oil and gas-bearing formations in underground space. However, in actual production, due to the limited frequency bandwidth of seismic data, the ability to distinguish thin layers of seismic data is restricted. Therefore, carrying out reflection coefficient in...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/307G01V1/306
Inventor 袁成苏明军崔向丽
Owner PETROCHINA CO LTD
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