Seismic linear noise attenuation based on the lateral random reorder

Linear noise attenuation is a troublesome problem in various seismic exploration areas, especially weak-energy linear noise. Traditional methods often use the differences in frequency or apparent velocity to separate the signal and linear noise. However, the application is limited when the aforementioned differences between signal and linear noise characteristics are too small to be distinguished. For this reason, we proposed a lateral random reorder method, where the proposed method flattens the linear events using the rotating coordinate system and performs a lateral random reorder for each time point. Because of the random reorder, events with different apparent velocities from the linear noise are disrupted as randomized outliers, which significantly amplifies the difference between the linear noise and other signals. Applications to synthetic and field data visually and quantitatively confirmed the superiority and the robustness of the proposed method, which can effectively suppress linear noise and reduce the loss of effective signals.