Method, device and system for suppressing seismic noise

A technology for suppressing noise and noise, applied in the field of seismic data processing, can solve the problem of curvelet coefficient differentiation, affecting the signal-to-noise ratio of seismic data, etc., to reduce the complexity and improve the signal-to-noise ratio.

Inactive Publication Date: 2019-06-21
PETROCHINA CO LTD
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Problems solved by technology

However, some noise in seismic data (such as coherent noise) is difficult to distinguish effectively from the curvelet coefficient of the effective reflection wave directly through numerical values, thus affecting the signal-to-noise ratio of the finally obtained seismic data

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  • Method, device and system for suppressing seismic noise
  • Method, device and system for suppressing seismic noise
  • Method, device and system for suppressing seismic noise

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[0058] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below in conjunction with the drawings in one or more embodiments of this specification Obviously, the described embodiments are only some of the embodiments in the description, not all of them. Based on one or more embodiments in the description, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the embodiments of the description.

[0059] The existing technology uses curvelet transform to suppress noise. Usually, the threshold is set according to the parameters of the curvelet coefficient—direction, scale, and size, combined with the type of noise. Then, threshold processing is performed on the curvelet coefficient to achieve noise suppression. . The c...

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Abstract

The embodiment of the invention discloses a method, device and system for suppressing seismic noise, and the method comprises the steps: carrying out the curvelet transformation processing of originalseismic data, and obtaining a curvelet coefficient; solving a gradient for the curvelet coefficient to obtain a local wave vector; carrying out first threshold processing on the size of the local wave vector to obtain a curvelet coefficient after threshold processing; and performing inverse curvelet transformation on the curvelet coefficient subjected to threshold processing to obtain seismic data after noise suppression. According to the embodiment of the invention, the method can achieve the more effective suppression of the seismic noise, and improves the signal-to-noise ratio of the seismic data.

Description

technical field [0001] The present invention relates to the technical field of seismic data processing, in particular to a method, device and system for suppressing seismic noise. Background technique [0002] Seismic data processing is one of the key links in seismic exploration. Among the three requirements of "high signal-to-noise ratio, high resolution and high fidelity", signal-to-noise ratio is the basis. Due to various reasons, the effective signal is polluted by various noises, resulting in low signal-to-noise ratio of seismic data, which brings great difficulties to velocity analysis and migration imaging, seriously affects the authenticity and reliability of imaging, and is difficult to meet the requirements of exploration . Therefore, suppressing noise and improving the signal-to-noise ratio of data has become the primary task of seismic data processing. [0003] Curvelet transform is introduced into seismic data processing because it can well deal with the line...

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Application Information

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IPC IPC(8): G01V1/36
Inventor 袁焕王宇超王西林胡书华刘威吴杰
Owner PETROCHINA CO LTD
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