TGS and Partners Announce Successful Completion of the Utsira OBN Reprocessing Project
TGS, a leading global provider of energy data and intelligence, in partnership with Aquila Holdings ASA and Viridien, has announced the completion and delivery of the reprocessing of the Utsira ocean bottom node (OBN) seismic survey in the Norwegian North Sea. This project has garnered significant industry support and capitalizes on the growing demand for high-definition seismic imaging in this highly prospective region.
The Utsira OBN survey involved over 144,000 node deployments, more than 5.5 million shots, and covers an area of 2,077 square kilometers in a mature part of the North Sea. The survey was conducted in 2018 and 2019, with initial processing results delivered in 2020, and remains the largest OBN survey on the Norwegian Continental Shelf.
The reprocessing project utilized raw offshore field data and advanced technologies such as time-lag full waveform inversion and advanced velocity model building techniques. These advancements have significantly improved image resolution and frequency content, enhancing fault interpretation and reservoir characterization workflows. The reprocessed products will significantly advance the Utsira OBN survey and provide valuable support for clients managing existing petroleum production and reservoir operations.
David Hajovsky, Executive Vice President of Multi-Client at TGS commented, “Through the reprocessing of this OBN data, TGS, in collaboration with Viridien and Aquila Holdings, can equip our clients with the resources to unlock the full potential of this well-established and highly productive petroleum basin. Whether through uncovering new reserves or optimizing current operations, this data offers valuable insights that will greatly enhance understanding of the region.”
The Utsira area is home to several significant oil and gas fields, including Edvard Grieg, Ivar Aasen, Balder, Gina Krog, Gudrun, and Johan Sverdrup, as well as a number of undeveloped discoveries and prospects.
