Method and device for removing surface waves from seismic records

A technology of seismic recording and surface wave, applied in the field of seismic data processing of petroleum exploration, can solve the problems of removing seismic records, residual surface waves, reducing the signal-to-noise ratio of seismic data, etc., to achieve the effect of removing surface waves and reducing losses

Inactive Publication Date: 2015-02-25
PETROCHINA CO LTD
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Problems solved by technology

[0002] Because surface waves exist extensively and have strong energy, which seriously affects the effective reflection in the middle and deep layers and reduces the signal-to-noise ratio of seismic data, surface wave elimination has become an important task in seismic data processing. According to the characteristics of surface waves, we can adopt There are many ways to remove surface waves, such as radial trace transform, wavelet transform, etc., but these single methods of eliminating surface waves often fail to achieve the desired effect
[0003] Wavelet transform is the wavelet decomposition of seismic records on multiple different scales. The wavelet transform coefficients obtained by wavelet decomposition on each scale repre

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  • Method and device for removing surface waves from seismic records
  • Method and device for removing surface waves from seismic records
  • Method and device for removing surface waves from seismic records

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[0050] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0051] The specific implementation of the embodiment of the present application will be described in detail below using specific examples.

[0052] Such as figure 1 As shown, the embodiment of the present application provides a method for removing surface waves from seismic records, the method comprising:

[0053] S201: Perform frequency ...

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Abstract

The embodiment of the invention discloses a method and device for removing surface waves from seismic records. The method includes the steps that frequency division scanning is conducted on the seismic records to be processed, and the distribution range of surface wave frequency bands is acquired; according to the distribution range of the surface wave frequency bands, wavelet frequency division is conducted on the seismic records, and the seismic records on different frequency bands are acquired; according to the distribution range of the surface wave frequency bands, the seismic records containing the surface waves are recognized from the seismic records on the different frequency bands, and radial way conversion is conducted on the seismic records containing the surface waves; according to the distribution range of the surface wave frequency bands, the high-pass filtering frequency is determined, and high-pass filtering is conducted on the seismic records acquired after radial way conversion in a radial way domain; Reverse radial way conversion is conducted on the seismic records acquired after high-pass filtering; wavelet reconstruction is conducted on the seismic records acquired after reverse radial way conversion and the seismic records on the different frequency bands and not containing the surface waves, and the seismic records with the surface waves removed are acquired.

Description

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Claims

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Application Information

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Owner PETROCHINA CO LTD
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