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Method and system for reconstructing seismic data based on Fourier transform

A Fourier transform, seismic data technology, applied in the field of oil and gas geophysics, can solve the problem of not being able to reconstruct seismic data well, and achieve the effect of improving the superposition effect, improving the quality and improving the accuracy

Inactive Publication Date: 2019-04-02
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The Fourier reconstruction method can not only reconstruct regular sampling seismic data, but also reconstruct irregular and random sampling seismic data, but it cannot reconstruct seismic data containing spatial aliasing very well.

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  • Method and system for reconstructing seismic data based on Fourier transform
  • Method and system for reconstructing seismic data based on Fourier transform
  • Method and system for reconstructing seismic data based on Fourier transform

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[0034] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0035] figure 1 A flowchart showing the steps of the Fourier transform-based seismic data reconstruction method according to the present invention.

[0036] In this embodiment, the seismic data reconstruction method based on Fourier transform according to the present invention may include:

[0037]Step 101, based on the initial seismic data, establish a Fourier reconstruction linear equation through a multi-step autoregressive method; in one example, the multi-step autoregressive met...

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Abstract

A method and system for reconstructing seismic data based on Fourier transform are disclosed. The method may comprise the following steps: establishing a Fourier reconstruction linear equation by a multi-step autoregressive method based on initial seismic data; establishing a target function by least squares inversion based on Fourier reconstruction linear equation; obtaining a sparse solution based on the objective function, and further reconstructing seismic data. The method combines the least squares Fourier reconstruction method and the multi-step autoregressive method to obtain a good application effect for accurately reconstructing complex seismic data, which plays a very important role for improving the precision of subsequent velocity analysis, improving the superposition effect, enhancing the quality of pre-stack migration, etc.

Description

technical field [0001] The present invention relates to the technical field of oil and gas geophysics, and more specifically, to a Fourier transform-based seismic data reconstruction method and system. Background technique [0002] As we all know, the acquisition of seismic data seriously affects the final imaging results of seismic data, and a very common problem in seismic data acquisition is that seismic data is irregularly sampled or diluted along the spatial direction. Ideally, the sampling of the seismic wavefield should be regular and dense. Currently, spatially dense sampling of seismic wavefields with geophones is technically and computationally feasible, but economically prohibitive. Therefore, the reason why seismic data is sparsely sampled in the spatial direction is mainly due to economic considerations. Sparse sampling is cheaper, but it means that less data is collected, and it will lead to spatial aliasing in seismic data, especially in 3D seismic survey. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/36
CPCG01V1/28G01V1/362G01V2210/70
Inventor 霍志周刘喜武张远银
Owner CHINA PETROLEUM & CHEM CORP
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