Amplitude-preserving fidelity linear coherent noise suppression method and processing terminal

Abstract

The invention relates to an amplitude-preserving fidelity linear coherent noise suppression method and a processing terminal. The method comprises: step 1, acquiring a common shot point gather and a stratum speed; step 2, performing spherical diffusion compensation to obtain a common shot point gather A _shot after spherical diffusion compensation; step 3, conducting F-K domain inclination angle filtering on the A_shot to obtain N_shot; step 4, subjecting the A_shot and the N_shot to noise attenuation through a self-adaptive subtraction method to obtain R_shot; step 5, performing dynamic correction on the N_shot to obtain Nnmo_shot subjected to dynamic correction; step 6, extracting linear coherent noise Nrem_shot from the Nnmo_shot; step 7, performing self-adaptive subtraction method noise attenuation according to the Nnmo_shot and the Nre_shot to obtain a residual effective signal common shot point gather Rrem_shot; step 8, performing reaction correction on the Rrem_shot to obtain aresidual effective signal Rremnmo_shot; 9, performing add-back to obtain an amplitude-preserving fidelity effective signal shot gather Rall_shot; and step 10, performing inverse spherical diffusion compensation on the effective signal shot gather Rall_shot to obtain a common shot point gather after suppressing linear coherent noise. According to the invention, linear coherent noise can be effectively suppressed in an amplitude-preserving and fidelity manner.

Description

technical field [0001] The invention relates to the technical field of seismic data noise processing, in particular to an amplitude-preserving and fidelity linear coherent noise suppression method and a processing terminal. Background technique [0002] Due to the complex geological environment or exogenous environment in the exploration area, there is often a lot of noise in the seismic data collected by seismic exploration, and it is necessary to denoise the seismic data. In the denoising process, the noise is suppressed without damaging the effective signal as much as possible, and the effective signal is extracted, so as to obtain seismic data with high signal-to-noise ratio, high fidelity, and high amplitude. For marine seismic exploration, due to the influence of passing ships, side reflections, other nearby seismic ships, and cables themselves, there will inevitably be linear coherent noise in seismic data, which will seriously affect the signal-to-noise ratio of the ...

AI Technical Summary

Problems solved by technology

[0005] The second purpose of the present invention is to provide a processing terminal, which can solve the problem of suppressing noise with amplitude and fidelity

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