Abstract

Multi-steamer surveys are although highly cost effective but bear inherent weaknesses which bring a significant degradation in quality of seismic imaging. As the marine seismic surveys are designed with single cross foldage, for obvious reason it can be understood that near offset will be missing on the subsurface line generated from the steamer away from the source line. Hence alteration in the foldage is obtained parallel to sub-line causing heavy footprints at least in the shallower section of the volumes. Moreover, various conditions such as severe marine current, cable feathering, economic constraints and obstruction result gap in coverage and irregular trace spacing.