Ground roll suppression in f-x domain based on em-pirical mode decomposition
Dong Lieqian1, Li Zhenchun1, Yang Shaochun1, Li Fengle2, Wang Jiao1
1. School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266555,China;
2. Xinjiang Oilfield Company Limited,PetroChina,Karamay,Xinjiang 834000,China
Abstract：In order to overcome limits of regular tracespatial sampling in filtering and signal loss orincomplete ground roll suppression due to inaccu-rate filtering window selection, we introduce inthis paper a new method based on empirical modedecomposition(EMD) for ground roll suppression.EMD decomposes adaptively from signal high fre-quency to low frequency into oscillating compo-nents called intrinsic mode functions(IMFs)，which can be also regarded as wave number rangesfrom high to low in spatial direction. Moreover，IMFl represents mostly high wave number data.Since ground rolls are mostly distributed in lowfrequency and high wave number，we can removeeffectively ground rolls by casting out IMFl of lowfrequency obtained by EMD in special sequence.Inaddition，EMD does not need regular trace spatialsampling.Therefore，this method can be regardedas an auto-adaptive f-k filter with a frequency-de-pendent，high-cut wave number filtering property.Applications to model data and real field data indi-cite that this method suppresses not only groundrolls, but also greatly maintains signals.
董烈乾, 李振春, 杨少春, 李凤磊, 王娇. 基于经验模态分解的f-x域面波压制方法[J]. 石油地球物理勘探, 2013, 48(1): 42-48.
Dong Lieqian, Li Zhenchun, Yang Shaochun, Li Fengle, Wang Jiao. Ground roll suppression in f-x domain based on em-pirical mode decomposition. OGP, 2013, 48(1): 42-48.
