Abstract:

Based on wave equation, inverse data method is induced from feedback iteration method to attenuate surface-related multiples, which uses the separation properties between primaries and multiples in inverse data domain. After transforming seismic data with multiples to inverse data domain, multiples energy is focused in some area. Attenuating surface-related multiples in inverse data domain can be realized by muting the focus energy simply, which avoiding adaptive fitting subtraction during prediction and subtraction based on wave equation, and primaries energy can not be harmed. Single trace seismic record and synthetic shot data model tests show that inverse data method is simple and applicable, which can attenuate surface-related multiples effectively, also maintain primaries well. Comparing with conventional SRME method show that inverse data method can cope with intercept events between primaries and multiples well.

Key words: seismic prospecting, surface-related multiple, inverse data domain, primary, surface-related multiple elimination