Abstract

The pursuit for better marine seismic data quality must contend with the phenomenon of ghosting. Wavefield separation techniques can do this. But in order to perform full deghosting, the challenge at both the source side and the receiver side must be addressed. The specific implementation of wavefield separation does not need to be the same for each case. So for Ocean Bottom Cable surveys, standard dual-sensor recording can enable the wavefield separation to be performed at the receiver side and deployment of over/under airgun arrays can enable the same at the source side. Such a strategy was employed in the field trials presented here. Penetration to deeper targets was the most significant benefit that was observed. This was followed by overall improvements in the signal-to-noise ratio and resolution