The deal raises offshore pay by $4,500 a year and lifts shift and night supplements, averting disruption at 8,100 workers' platforms.
On Friday, unions Styrke, Safe, and Lederne reached a last-minute wage agreement with Offshore Norway, averting a strike involving 8,000 offshore employees, the industry group announced.
Negotiations entered a government-brokered mediation process as a potential strike by more than 600 workers threatened operations in Western Europe's top oil and gas producer.
The final deal includes a general annual pay increase of $4,500, or 42,000 NOK, for affected staff, alongside increased shift and night supplements.
"By standing together, we have achieved a better result than we would have managed individually," leaders from the three trade unions said.
Norway remains Europe's primary gas supplier after replacing Russia in 2022, a strategic role that heightens the global significance of any production disruption amid the Middle East crisis.