Ocean-bottom cable data multiple suppression based on equipoise pseudo-multichannel matching filter

Abstract

The effect of strong refl ection interfaces, such as free surface, seabed, is strong; thus, the coupling of multiples and waves reduces the quality of ocean-bottom cable seismic data. Using the different polarity response of hydrophones and geophones to downgoing wave fi elds, dual-sensor summation can eliminate receiver-side multiples, enhance primaries, and improve the resolution of seismic data. We present a dual-sensor summation method based on the equipoise pseudo-multichannel adaptive matching filter. Compared with traditional methods, the proposed method is totally data driven and does not depend on the refl ection coeffi cient; moreover, good results are obtained using synthetic and real data.