Multi-Sensor Streamer Broadband 4D Acquisition

The desire to extend all the benefits of broadband 3D data to 4D time-lapse surveys has been hampered by the requirement for repeatability between successive surveys. The use of deep-towed multi-sensor streamers in time-lapse acquisition creates challenges, as the existing baseline surveys will often have been acquired using a shallow-tow streamer. For optimal 4D repeatability, subsequent monitor acquisitions would traditionally be acquired using the same streamer depth as the earlier surveys. We tested recording monitor data at a deeper streamer depth than the baseline survey using multi-sensor streamers, and then redatumming to simulate data recorded at the shallow streamer depth. Following this trial, we went on to acquire three 4D monitor surveys.