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

Abstract

The invention discloses a method for suppressing linear interference of pre-stack seismic data, a storage medium and equipment. The method comprises the following steps: processing original seismic shot gather data to obtain new data; carrying out discrete Fourier transform on the new data and then ranking the new data into a Hankel matrix; carrying out singular value decomposition rank reductionreconstruction on the Hankel matrix; performing one-dimensional inverse discrete Fourier transform on the reconstructed data to obtain estimation of linear interference waves; reversely flattening theestimated linear interference wave data, and subtracting the linear interference wave data from the original shot gather data to complete suppression of linear interference in the apparent dip angledirection; and repeating the above steps until all linear interference waves in the original shot gather data are processed. According to the method, when the effective signal and the linear interference signal are spatially aliasing, the linear interference can be effectively suppressed, the effective signal is prevented from being damaged, the signal originally covered by the linear interferencewave is displayed more clearly and visually, and the shot gather data after suppression of the linear interference can be used for later speed analysis, superposition processing, imaging and geologicstructure 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...

AI Technical Summary

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

Images