OSLO, Norway (18 November 2025) – TGS, a leading provider of energy data and intelligence, is pleased to announce that a major international energy company has extended its current contracts for the provision of reservoir monitoring and source services related to Permanent Reservoir Monitoring (PRM) and 4D Ocean Bottom Node (OBN) surveys on the Norwegian continental shelf. Both extensions have a nominal five-year duration, until 2030, with options to extend for a further five-year period. Kristian Johansen, ...