Alligin is 140 km (87 mi) west of Shetland in a water depth of 475 m (1,558 ft). It forms part of the Greater Schiehallion Area.
The Alligin development will consist of two wells tied-back into the existing Schiehallion and Loyal subsea infrastructure, using the processing and export facilities of the FPSOGlen Lyon.
The development will include new subsea infrastructure, consisting of gas lift and water injection pipeline systems, and a new controls umbilical. The wells will be drilled by the semisubmersibleDeepsea Aberdeen.
The project will target 20 MMboe and is expected to produce 12,000 boe/d (gross) at peak. It is expected to come onstream in 2020.
Alligin (BP 50% operator; Shell 50%) is part of a series of infrastructure-led subsea tieback developments in the North Sea, accessing new production from fields located near to established producing infrastructure.
BP North Sea regional president Ariel Flores said: “We announced our intention to develop Alligin in April and six months later we have achieved regulatory approval. Always maintaining our focus on safety, we are modernizing and transforming how we work in the North Sea to fully realize the potential of our portfolio.
“Alligin is part of our advantaged oil story, rescuing stranded reserves and tying them back into existing infrastructure. Developments like this have shorter project cycles, allowing us to bring on new production quicker. These subsea tiebacks complement our major start-ups and underpin BP’s commitment to the North Sea.”
Brenda Wyllie, West of Shetland and Northern North Sea area manager at the OGA, said: “… This fasttracked project will maximize economic recovery through using capacity in theGlen Lyon FPSO and is a good example of the competitive advantage available to operators from the extensive infrastructure installed in the UKCS.”
This is BP’s second North Sea development approval in the past two months.Vorlich, which targets 30 MMboe, received regulatory approval in September.