煤田地质与勘探2019，Vol.47Issue(1)：187-193,199,8.DOI:10.3969/j.issn.1001-1986.2019.01.029
f-x域共偏移距道集的EEMD随机噪声压制方法
Random noise attenuation by EEMD in common offset gathers
摘要
Abstract
There are two problems in the random noise attenuation in f-x domain: (1) Reflected waves as hyperbolic events in pre-stack CMP gather or shot gathers, de-noising will damage the effective wave; (2) Seismic signals are complex non-stationary signals, requiring that the de-noising method has the adaptivity. Aiming at these two problems, a random noise suppression method based on f-x EEMD was proposed. The method utilizes the reflected waves which are horizontal events in common offset gathers, satisfying the f-x domain de-noising assumption, and the good adaptability of EEMD algorithm to non-stationary signals. For each frequency slices in the f-x domain, signal is decomposed into a series of IMFs by EEMD, and the first IMF component which is noise dominant is removed. Finally, f-x domain data is inversely transformed back to t-x domain to realize noise separation. The theoretical trial and practical application indicate that the proposed method can suppress the random noise while maintaining the desired signal.关键词
随机噪声/共偏移距道集/f-x域/EEMD/噪声压制Key words
random noise/common offset gather/f-x domain/EEMD/noise surpression分类
天文与地球科学引用本文复制引用
石战战,夏艳晴,周怀来,池跃龙,庞溯..f-x域共偏移距道集的EEMD随机噪声压制方法[J].煤田地质与勘探,2019,47(1):187-193,199,8.基金项目
国家科技重大专项课题(2016ZX05026-001) （2016ZX05026-001）
四川省教育厅项目(16ZB0410) （16ZB0410）
