Production started on Nov. 15. The estimated field life is 15 years.
The project produces from the Harris and Barra oil fields, 160 km (99 mi) east of the Shetlands and 12 km (7.5 mi) west of the Tern field. Water depth is 165 m (541 ft).
The Western Isles development consists of production and water injection wells tied back to a newbuild FPSO with oil export using shuttle tankers. The cylindrical FPSO measures about 90 m (295 ft) at its widest and weighs more than 28,000 metric tons, with the capacity to produce 44,000 b/d of oil and store 400,000 bbl in its tanks.
Partners are Dana as operator with 77% and Cieco with 23%.
Brenda Wyllie, Northern North Sea Manager at the Oil & Gas Authority, said: “The first oil milestone from the Western Isles development is positive news and helps confirm the remaining potential of the UK continental shelf.
“Dana’s approach to intervention, when managing a complex and remote project, has seen them successfully achieve this goal. The OGA welcomes investment in a mature area of the North Sea and looks forward to more of these developments coming on stream and enabling MER UK.”