Global crude oil giant BP has announced the flow of first oil from Alligin field located west of Shetland in the UK North Sea.

The Alligin oilfield is jointly owned by BP (50%) and Shell (50%), with BP serving as the sole operator of the field.

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It forms part of the Greater Schiehallion Area, situated 140km west of Shetland. Estimates suggest it contains approximately 20 million barrels of recoverable oil equivalent.

Since its start-up in late December, peak production of the oil field has reached 15,000boe/d.

BP said that the development includes new subsea infrastructure. This comprises of a gas lift, water injection pipeline systems and a new control umbilical.

Shell and BP are developing the oil field as a two-well subsea tie-back. It will tie-back into the existing Schiehallion and Loyal subsea infrastructure network and the Glen Lyon floating, production, storage and offloading (FPSO) vessel via subsea pipelines.

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BP North Sea regional president Ariel Flores said: “Achieving first oil from the Alligin field safely, under budget and ahead of schedule is testament to the performance of the project team and their agile approach to planning and execution.

“Alligin is part of BP’s advantaged oil strategy, a development with a shorter project cycle time with oil that is economic to produce and low risk to bring to market. Subsea tiebacks like this complement our major start-ups and help underpin our growing portfolio west of Shetland.”

In October 2018, BP and Shell secured approval from the Oil and Gas Authority (OGA) to proceed with the Alligin development.