Regular disturbance suppression method for seismic data

A technology of seismic data and rules, applied in seismic signal processing and other directions, can solve the problem of insignificant denoising effect, and achieve good adaptability and good fidelity effect.

Active Publication Date: 2015-08-19
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0005] An exemplary embodiment of the present invention is to provide a method for suppressing regular disturbances in seismic data, which can overcome the defect that the denoising effect is not obvious in the existing regular disturbance suppression methods

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  • Regular disturbance suppression method for seismic data
  • Regular disturbance suppression method for seismic data
  • Regular disturbance suppression method for seismic data

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Embodiment Construction

[0026] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like numerals refer to like parts throughout. The exemplary embodiments are described below in order to explain the present invention by referring to the figures.

[0027] figure 1 A flowchart showing a method for suppressing regular disturbances in seismic data according to an exemplary embodiment of the present invention.

[0028] refer to figure 1 , in step S10, frequency division processing is performed on the seismic data to separate the seismic data in the low frequency band. Here, the low frequency band is a frequency interval of regular interference, which can be determined according to the geological characteristics of the work area where the seismic data is located. As an example, the seismic data in the low frequency band is seismic data with a frequency of 0 Hz to 20 Hz.

[0029] In step S20, ...

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Abstract

The invention provides a regular disturbance suppression method for seismic data, which comprises the steps of (a) processing seismic data in a frequency-divisional manner to extract seismic data within a low frequency band; (b) deterring the scanning speeds of a predetermined number within the apparent velocity interval of regular disturbances; (c) according to the extracted extract seismic data within the low frequency band, determining the data of the regular disturbances corresponding to each of the scanning speeds; (d) adding up the data of the regular disturbances corresponding to each of the scanning speeds to obtain all the data of the regular disturbances; and (e) subtracting all the data of the regular disturbances from the seismic data to obtain seismic data after the suppression of the regular disturbances. According to the embodiments of the regular disturbance suppression method for seismic data provided by the invention, the difference between the apparent velocities of regular disturbances and effective signals is fully utilized. In this way, the regular disturbances are suppressed in a time-space domain based on a matrix combination through the decomposition process, and various regular disturbances are effectively separated. The method is good in fidelity effect and excellent in adaptability.

Description

technical field [0001] The present invention generally relates to the technical field of seismic data denoising, and more specifically, relates to a method for suppressing regular disturbances in seismic data. Background technique [0002] In the seismic data collected in complex surface areas, the signal-to-noise ratio of the data is very low, and there are quite serious regular interferences. Generally, this kind of noise seriously interferes with the effective reflection signal and greatly reduces the signal-to-noise ratio of the seismic data. [0003] At present, there are two main types of methods to suppress rule interference. One is the fan filter method in the frequency wavenumber domain, which belongs to the conventional method of eliminating regular interference. It uses the apparent speed difference between the interference wave and the effective wave to attenuate the regular interference in the frequency wavenumber domain. However, this method needs to assume th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
Inventor 曹中林何光明陈爱萍罗红明金德刚杨海涛王珑熊晶璇李振
Owner BC P INC CHINA NAT PETROLEUM CORP
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