Method for attenuating rayleigh wave scattered noise in earthquake data-handling

Abstract

The invention provides a method for attenuating Rayleigh wave scattering noise during the seismic data processing, the method only carries out the scattering noise attenuation processing of a frequency band which mainly contains a scattering wave field and does not affect the characteristics of the original wave fields of other frequency bands, so the method is the noise removing method with the relative fidelity. The method comprehensively utilizes the linear wave field transform, the wavelet transform and the Alpha-trimmed filtering technology to extract the Rayleigh wave scattering incident wave field and calculate the wavelet, then the best estimation of the scattering wave field is realized through the inversion technology of the scattering wave field, and the estimated scattering noise is further subtracted from the original wave fields, thereby effectively improving the signal-to-noise ratio of seismic information.

Description

technical field

[0001] The invention relates to a seismic data processing method, in particular to a method for attenuating Rayleigh (Rayleigh) wave scattering noise in the field of seismic data processing in geophysical exploration. Background technique

[0002] Seismic exploration is a method of geophysical prospecting that uses artificial seismic technology to stimulate seismic waves and study the propagation of seismic waves in the formation to find out the geological structure or lithology characteristics of the underground and serve the purpose of finding oil and gas reservoirs or other exploration purposes. Seismic exploration is the most effective method among the various geophysical prospecting methods for oil exploration.

[0003] The production work of seismic exploration can basically be divided into three links: seismic data acquisition, seismic data processing, and seismic data interpretation:

[0004] The first link is seismic data acquisition. The main task...

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