应用地球物理（英文版）
應用地毬物理（英文版）
응용지구물리（영문판）
APPLIED GEOPHYSICS
2011年
1期
27-35
,共9页
刘华锋%陈小宏%宋家文%刘国昌
劉華鋒%陳小宏%宋傢文%劉國昌
류화봉%진소굉%송가문%류국창
multiple%matching subtraction%non-causal convolution operator%variable length window
The filter operator used in normal multichannel matching filter is physically realizable.This filter operator only delays seismic data in the filtering process.A non-causal multichannel matching filter based on a least squares criterion is proposed to resolve the problem in which predicted multiple model data is later than real data.The differences between causal and non-causal multichannel matching filters are compared using a synthetic shot gather, which demonstrates the validity of the non-causal matching filter.In addition, a variable length sliding window which changes with offset and layer velocity is proposed to solve the count of events increasing with increasing offset in a fixed length sliding window.This variable length sliding window is also introduced into the modified and expanded multichannel matching filter.This method is applied to the Plutol.5 synthetic data set.The benefits of the non-causal filter operator and variable length sliding window are demonstrated by the good multiple attenuation result.
