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Surface wave noise suppression method and device

A noise suppression and surface wave technology, applied in the field of geophysical seismic exploration, can solve the problems of surface wave noise suppression of aliasing energy, etc., and achieve the effect of avoiding serious overlapping

Pending Publication Date: 2021-02-19
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0005] An embodiment of the present invention provides a surface wave noise suppression method to solve the problem of aliasing energy in surface wave noise suppression. The method includes:

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  • Surface wave noise suppression method and device
  • Surface wave noise suppression method and device

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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0037] The embodiment of the present invention provides a surface wave noise suppression method, so that the waveform characteristics of the original seismic data can be better maintained after denoising, and the signal-to-noise ratio and resolution of the seismic data can be improved to a large extent. Imaging, attribute extraction and reservoir development provide favorable conditions. Such as figure 1 As shown, the method includes steps 101 to 106:

[0038] Step 101, acquire the collected seismic data, and perform preprocessing on the seismic data.

[0039] Amon...

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Abstract

The invention discloses a surface wave noise suppression method and device, and the method comprises the steps: setting a surface wave time window, and determining the frequency dispersion spectrum ofto-be-processed data; utilizing the frequency dispersion spectrum to obtain a frequency speed curve; performing phase shift processing on each channel of the adjacent channels of the specified channel number of each channel in the to-be-processed data by utilizing the frequency speed curve and the offset distance of each channel of the adjacent channels, and superposing each channel after phase shift processing to obtain a surface wave prediction result of each channel; performing phase matching on the surface wave prediction result of each channel of the adjacent channels and the corresponding channel in the preprocessed seismic data to obtain an optimal matching time shift amount, and performing time shift processing on the corresponding channel in the surface wave prediction result byutilizing the optimal matching time shift amount to obtain an optimal prediction result of the surface wave of the channel; and subtracting the optimal prediction result of the channel surface wave from the preprocessed seismic data of each channel to obtain seismic data for suppressing surface wave noise. According to the invention, the problem of false frequency energy in surface wave noise suppression can be solved.

Description

technical field [0001] The invention relates to the technical field of geophysical seismic exploration, in particular to a method and device for suppressing surface wave noise. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] With the continuous deepening of exploration, oil and gas exploration in complex areas and complex oil and gas reservoirs has become the main target of geophysical exploration. Oil and gas exploration in complex areas and complex oil and gas reservoirs is a very complex system engineering. Improving the signal-to-noise ratio is one of the important links in seismic exploration data processing in complex areas, and suppressing noise is particularly important in seismic data processing. In seismic data processing, surface wave is a very common noise, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
CPCG01V1/362G01V1/364G01V2210/324G01V2210/53
Inventor 孙郧松王文闯张建磊熊定钰王嘉琪马渊明
Owner BC P INC CHINA NAT PETROLEUM CORP
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