Ultra Wide-Tow Penta Source in the Barents Sea
The ultimate milestone for wide-tow multi-source acquisition has recently been achieved in the Barents Sea. In September 2020, Ramform Tethys conducted a seismic survey with a penta-source configuration delivering 315 meter total separation.
In the examples from two adjacent surveys in the Barents Sea, reservoir targets can be found above the first water-bottom multiples. Near-offset information is critical for accurately delineating prospects and to conduct AVO studies. The first figure below illustrates the gain in ultra-near offset coverage achieved with the respective wide-tow triple and penta-source configurations. The ultra-wide penta-source solution demonstrates excellent coverage which is free of near-offset gaps between sail lines.
Details of the shallow complex geology are revealed both on timeslices and cross-sections, including diffractions (figure below). The comparison exemplifies how modern towed-streamer acquisition can be tailored to meet the geophysical and geological challenges in a time and cost-effective manner. The processing and velocity model building have started and the first imaging results will be available very soon.