Benefit of OBS PP and PS Data for Structural Interpretation on Snøhvit and Albatross Fields

In this case study from Snohvit and Albatross we show how Ocean Bottom Seismic (OBS) PP and PS data is used to improve the structural interpretation of reservoirs below overburden shallow gas anomalies. Comprehensive processing, velocity model building and data integration were crucial to achieve good results. The OBS PS has a good quality below the shallow gas anomaly on both Albatross and Snohvit. On Snohvit, OBS PP data shows better quality compare to streamer data. This clearly reduces uncertainties related to structural interpretation compare to streamer data alone. However, on Albatross the quality of both OBS PP and streamer data are poor, and high quality OBS PS data has given largest impact on structural interpretation. Updated structural interpretation greatly improved our geological understanding and may change the reservoir management of the field.