Conventional versus dual‐sensor streamer data de‐ghosting; A case study from the Haltenbanken dual‐streamer acquisition

Abstract

Recent developments in the field of marine towed streamer acquisition technologies have brought about new data information that needs to be assessed and compared to conventional data. Dual-sensor towed streamer acquisition, with its wave-field decomposition capabilities, is one such recent development. The present work compares conventional data with dual-sensor data acquired simultaneously at 2 different depths. The two streamers were towed vertically under each other, the conventional at 8m depth and the dual-sensor at 15m depth. To facilitate comparison the data from the two streamers have been processed optimally and in the same manner, i.e. wave field decomposition was also conducted on the conventional streamer data. The resulting up-going pressure field was compared to the up-going pressure field derived from the dual-sensor data. The comparison shows a clear advantage for the dual-sensor wave field decomposition result. Since the comparison is mostly limited to the low frequencies in this case, the superior result from the dual-sensor streamer data is attributed to better signal-to-noise ratio due to a deeper towing depth.