TGS, in partnership with Aquila Holdings and Viridien, has completed reprocessing of the Utsira ocean-bottom node (OBN) seismic survey in the Norwegian North Sea.
The program comprised more than 144,000 node deployments, over 5.5 million shots and covered a 2,077-sq-km area. Acquisition took place in 2018-2019, with initial results delivered in 2020.
Viridien reprocessed the dataset with OBN imaging technologies, such as time-lag full-waveform inversion and advanced velocity model building techniques, to improve image resolution and frequency content for fault interpretation and reservoir characterization workflows.
The mature Utsira region includes the Edvard Grieg, Ivar Aasen, Balder, Gina Krog, Gudrun and Johan Sverdrup fields as well as various undeveloped discoveries and prospects.
