Energy giant BP is to develop two new North Sea fields capable of producing up to 30,000 barrels of oil a day, the company has announced.
Alligin, west of Shetland, and Vorlich - in the central North Sea - are expected to come on stream in 2020.
BP said investment in the fields would total about £420m.
BP said Alligin and Vorlich would lead to "significant production gains" and further demonstrated a commitment to the North Sea.
BP and Shell each hold 50% stakes in Alligin, while BP has 66% of Vorlich alongside Ithaca Energy's 34% share.