Deblending 4-component simultaneous-source data – A 2D OBC case study in Malaysia

In ocean-bottom cable (OBC) acquisitions, a significant part of the survey time is dedicated to source shooting. Simultaneous-source shooting, which allows time overlaps between shots, paves the way for an increase in acquisition productivity or better wavefield sampling (Hampson et al., 2008). However, blended datasets require specific treatment before being processed using conventional techniques (Davies et al., 2013). In this paper, we present the deblending work carried out on a blended 2D 4-component (4C) OBC shallow water dataset acquired in Malaysia with time dithering between sources. The deblending flow, based on a combination of iterative signal extraction and impulsive and interference noise attenuation, is described together with the QC procedures performed prior to migration. This flow is designed to tackle the deblending of both compressional and converted waves.