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Prestack seismic gather noise suppression method and device

A pre-stack seismic and gather technology, applied in the field of oil and gas seismic exploration, can solve problems such as poor processing effect, and achieve the effect of signal-to-noise separation and high time-frequency resolution

Active Publication Date: 2017-02-22
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0004] However, for seismic records of non-stationary signals, the ordinary time-frequency transformation method is not effective in processing

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  • Prestack seismic gather noise suppression method and device
  • Prestack seismic gather noise suppression method and device
  • Prestack seismic gather noise suppression method and device

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Embodiment Construction

[0060] 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.

[0061] figure 1 It is a schematic flowchart of the noise suppression method for pre-stack seismic gathers according to the embodiment of the present invention. Such as figure 1 As shown, the pre-stack seismic gather noise suppression method of the embodiment of the present invention includes steps:

[0062] S101: Performing a derivative synchrosqueezing DSST (Derivative Synchrosqueezing Wavelet Transforms) on each track record of the pre-stack seismic gather to generate a DSST time-frequency spectrum of the pre-stack seismic gather;

[0063] S102: Estimate a vector...

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Abstract

The present invention provides a prestack seismic gather noise suppression method and device. The method comprises the steps of carrying out the derivative synchrosqueezing wavelet transforms (DSST) on the recordings of a prestack seismic gather to generate a DSST time-frequency spectrum of the prestack seismic gather; according to the DSST time-frequency spectrum, estimating a vector parallel with an effective signal in the prestack seismic gather; according to the prestack seismic gather, setting a noise suppression parameter; according to the DSST time-frequency spectrum, the vector and the noise suppression parameter, carrying out the noise suppression processing on the prestack seismic gather to generate a DSST time-frequency spectrum after the noise suppression; according to the DSST time-frequency spectrum after the noise suppression, reconstructing to obtain the prestack seismic gather after the noise suppression. The DSST time-frequency spectrum generated by the method and device of the present invention has the higher time frequency resolution, and the noise suppression parameter and the vector parallel with the effective signal enable the noise suppression parameter to be adjusted adaptively and the effective signal to be protected, thereby having a better signal-noise separation effect.

Description

technical field [0001] The invention relates to the field of oil and gas seismic exploration, in particular to a pre-stack seismic gather noise suppression method and a device thereof. Background technique [0002] In the field of oil and gas exploration, the "three highs" (high resolution, high signal-to-noise ratio, and high fidelity) processing of seismic data has always been a difficult point and hot spot in scientific research and production, especially when seismic exploration targets are gradually shifting to subtle and complex oil and gas. In the case of reservoirs, reservoir description and development seismic put forward higher requirements on the processing quality of seismic data. Among them, the signal-to-noise ratio level of seismic data restricts the improvement of resolution to a large extent, because the broadening of high-frequency components is accompanied by the reduction of the overall signal-to-noise ratio of the data. If there is no reasonable noise su...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
Inventor 曹思远袁殿何元马媛媛张浩然崔震
Owner BC P INC CHINA NAT PETROLEUM CORP
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