Neptune addresses pipe corrosion at North Sea Cygnus complex
Third-quarter gas production from the Cygnus field in the UK southern North Sea was 8% higher than in the corresponding period for 2017, according to operator Neptune Energy.
However, two shutdowns took place due to corrosion failures in the vent line, although the corroded section of the piping has now been replaced.
During next year’s scheduled shutdown, Neptune will replace the entire line with a permanent corrosion-resistant alloy section to ensure better performance in future.
Drilling continues on the Cygnus FB9 exploration well – any commercial volumes discovered could be tied into the existing offshore infrastructure.
In the Norwegian North Sea, Neptune plans tiebacks to Gjøa subsea infrastructure of theCara field in license PL636 and the PL153 P1 accumulation.
The company is aiming for project sanction in both cases early next year followed by start-up by end-2020.
Preparations have started for removal of the company’s L10 C/D/G platforms in the Dutch North Sea, with heavy-lift operations scheduled for mid-2019. In the UK, discussions and planning are under way for removal of the Minke and Juliette subsea tieback facilities.