Zennor Wraps Up Finlaggan Subsea Installation Campaign

Zennor Petroleum has completed the 2019 Finlaggan subsea installation campaign utilizing six separate vessels.

Zennor is currently developing the 100% owned Finlaggan field in the UK Central North Sea block 21/05c and 21/05d.

The development project is targeting 30mmboe of gas condensate reserves from two subsea production wells tied back 20km to the Britannia platform.

The programme has seen the 20km long, 10” insulated (pipe-in-pipe) Finlaggan pipeline laid and trenched. After the flushing and pigging of the pipeline the 20km long infield umbilical was laid in the open trench adjacent to the pipeline.

Rock dumping of the pipeline and umbilical was completed with the rock-dumping vessel, the last to leave the field.

Critical work inside the Britannia 500 meter zone was also completed with the installation of the subsea isolation valve (SSIV) structure and the pull-in of the SSIV umbilical to the Britannia platform.

At year-end the Finlaggan project will be approaching 85% completion on a value of work done basis.

As previously reported, both Finlaggan production wells (F1 and F2) have already been drilled and tested, with each well flowing at more than 12,000 boepd at significantly higher than expected flowing wellhead pressures.

The remaining subsea scope, which includes the installation of a manifold at the Finlaggan location, will take place following the planned triennial Britannia/FPS shut down in 2020, the company informed.

The Finlaggan development project remains on schedule for first production in Q4 2020 as planned.

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. Finlaggan remains on track for first production in Q4 2020, taking our production towards 25,000 boepd in the near term.”