Private equity-backed North Sea operator Zennor Petroleum has completed this year’s subsea infrastructure installation campaign at its upcoming Finlaggan gas condensate development.
The work, which wrapped up over the weekend, has used six separate vessels over the summer, Zennor said on Tuesday.
Finlaggan, due on stream late next year as a two-well tie-back to the Britannia platform, is now about 85% complete.
The programme has included the laying and trenching of the 20-kilometre 10-inch insulated Finlaggan pipeline between the field and Britannia, which since yesterday is operated by Chrysaor after the UK independent completed its $2.68 billion acquisition of assets from ConocoPhillips.
After the flushing and pigging of the pipeline, the 20-kilometre long infield umbilical was also laid.
Rock dumping of the pipeline and umbilical was completed last weekend, with the rock-dumping vessel the last to leave the field, Zennor said.
Critical work inside the Britannia 500-metre zone was also completed with the installation of the subsea isolation valve structure and the pull-in of the SSIV umbilical to the Britannia platform.
The remaining subsea work, which includes the installation of a manifold at the Finlaggan location, will take place following the planned triennial Britannia-Forties Pipeline System shutdown in 2020.
Martin Rowe, Zennor’s managing director, said: “The completion of this 2019 subsea construction campaign is a significant step forward in the Finlaggan project.
“The success of the campaign is very clearly attributed to the time and effort invested in the planning and preparation phases, the professionalism of the offshore teams and the close working relationships between the Britannia operator, installation contractor and Zennor teams.”
Rowe said Finlaggan remains on track for first production in the fourth quarter next year and once on stream will take Zennor's production towards 25,000 barrels of oil equivalent per day in the near term.
Rowe told Upstream last week Zennor is aiming to reach production between 30,000 and 35,000 boepd by 2023 once other development come on stream.