Neptune Installs Subsea Flowlines at Norwegian Projects

Neptune Energy has installed subsea oil and gas production flowlines and gas lift flowlines at the Duva and Gjoa P1 projects in the Norwegian North Sea, it said on July 23.

The tiebacks will connect two templates to the nearby Neptune-operated Gjoa platform. Their installation comes just one year after development plans for Duva and Gjoa P1 were filed. Where possible, drilling, engineering, fabrication and installation work at the projects was done in parallel.

"Despite challenges caused by the Covid-19 pandemic, the subsea execution schedule for Duva & Gjoa P1 has been accelerated in comparison with our original plans," Neptune said. "Developing these two live projects in parallel provides greater flexibility and allows Neptune and its partners to increase efficiency and reduce costs."

Fabrication of tie-in spools is ongoing at TechnipFMC’s spoolbase in Evanton, UK, and the manufacture of the projects' subsea manifolds is nearing completion. They will be installed later this year. Full system integration testing is also underway. Development drilling at Gjoa P1 and Duva will run until the end of February 2021.

The subsea manifolds are scheduled for installation later this year, followed by the associated tie-in operations. Development drilling on both Gjoa P1 and Duva will continue up to the end of February next year, and topside work at the Gjoa platform will take place after that.

First production at Gjoa P1 is expected later this year, with Duva due to come on stream in the third quarter of 2021. Neptune operates both projects with 30% interests. Its partners at Gjoa are Petoro, Wintershall Dea and Okea, while it is joined at Duva by Idemitsu, PGNiG and Sval Energi.