A method, storage medium and equipment for suppressing linear interference of pre-stack seismic data

Abstract

The invention discloses a method, storage medium and equipment for suppressing the linear interference of pre-stack seismic data. The original seismic shot set data is processed to obtain new data; the new data is arranged into a Hankel matrix after discrete Fourier transform, and the Hankel matrix Carry out singular value decomposition and rank reduction reconstruction, and use one-dimensional inverse discrete Fourier transform on the reconstructed data to obtain the estimation of the linear interference wave, and then subtract the estimated linear interference wave data from the original shot set data, namely The suppression of linear interference in the apparent dip direction is completed, and the above steps are repeated until all linear interference waves in the original shot data are processed. The present invention can effectively suppress the linear interference and avoid damage to the effective signal when the effective signal and the linear interference signal are mixed in space, so that the signal originally covered by the linear interference wave can be displayed more clearly and intuitively, and the shot collection data after the linear interference is suppressed It can be used for post-velocity analysis, overlay processing, imaging, and geological structure analysis.

Description

technical field [0001] The invention belongs to the technical field of seismic exploration data processing, and in particular relates to a method for suppressing linear interference of pre-stack seismic data, a storage medium and equipment. Background technique [0002] In the process of seismic data acquisition and processing of artificial seismic exploration, some regular interference waves will be encountered. Among them, the regular interference waves with obvious linear structure on the seismic section are called linear interference waves, which have always been the key to affecting the signal-to-noise ratio of seismic data. one of the factors. The effective seismic reflection wave information on the original seismic data collected in the area where the linear interference wave is developed is strongly interfered, or even completely submerged. At the same time, the downward transmission of the excited seismic wave energy is also shielded, resulting in weak effective sig...

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Problems solved by technology

[0007] 1. It is necessary to manually locate the area that needs to be filtered. The number of singular values ​​​​used to reconstruct the noise needs to be obtained through trial and error. Inaccurate results will result in poor denoising effect or damage to effective signals.

[0008] 2. When the effective signal and the linear interference wave are aliased in space, it is easy to damage the effective signal

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