Energy giant BP said there had been a gas leak on the Ula field operated by the company in the Norwegian North Sea.
Gas was detected in the separator module on the production platform on Wednesday, September 12.
BP said the installation’s safety system shut down production immediately, and all workers were safely accounted for. It added: “After the incident, a minor oil sheen was observed on the sea surface, which dispersed naturally after a short period. BP has initiated an internal investigation.”
The leak at Ula was considered serious because its location posed a risk to the platform but the spill was contained and did not pose an environment risk, according to the Petroleum Safety Authority.