Random noise elimination based on the time-space variant median filtering
Sun Zhe1, Wang Jianfeng1, Wang Jing2, Yu Minjie1, Zhang Kun1
1. Acquisition Technique Support Department, BGP Inc., CNPC, Zhuozhou, Hebei 072751, China;
2. Development and Production Seismic Department, BGP Inc., CNPC, Zhuozhou, Hebei 072750, China
Abstract：Classical one-dimensional median filtering methods have some defects such as singleness in filtering direction and filter window length.To solve these problems,we propose in this paper a method for random noise elimination based on the time-space variant median filtering.On one hand,we set an appropriate filtering direction at every sample point according to the coherence characteristics of reflection events;and on the other hand,we choose an appropriate filtering length at every sample point according to the coherence degree of seismic data.Test results on model and real data show that the proposed method can effectively eliminate random noise on both shot records and seismic sections.
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