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

Abstract

The invention relates to a method for suppressing amplitude-preserving and fidelity linear coherent noise and a processing terminal. The method includes the following steps: step 1: obtaining a common shot point gather and formation velocity; step 2: performing spherical diffusion compensation to obtain spherical diffusion compensation The final common shot point gather A_shot; Step 3: Filter the A_shot F-K domain inclination angle to obtain N_shot; Step 4: Perform adaptive subtraction method on A_shot and N_shot to attenuate the noise to obtain R_shot; Step 5: Perform dynamic correction on N_shot , to get the Nnmo_shot after dynamic correction; Step 6: Extract linear coherent noise Nrem_shot from Nnmo_shot; Step 7: Carry out adaptive subtraction method to attenuate the noise according to Nnmo_shot and Nrem_shot, and obtain the residual effective signal common shot gather Rrem_shot; Step 8 : Perform reaction correction on Rrem_shot to obtain the residual effective signal Rremnmo_shot; Step 9: Add back to obtain the effective signal shot set Rall_shot with amplitude preservation and fidelity; Step 10: Perform inverse spherical diffusion compensation on the effective signal shot set Rall_shot to obtain suppressed linear coherence Common shot gathers after noise. The invention can effectively suppress linear coherent noise with amplitude preservation and fidelity.

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

Images