Lundin Petroleum said it has commenced drilling of exploration well 16/4-10 on the Fosen prospect.
The well is 27km south of the Edvard Grieg field and 11km south of the Luno II discovery on the Norwegian Continental Shelf.
The company said the main objective of the well is to test the hydrocarbon potential and reservoir properties at Jurassic sandstone level.
The Fosen prospect is estimated to contain gross unrisked prospective resources of 192 MMboe.
Lundin said the well will be drilled with the semi-submersible drilling unit the Island Innovator and is expected to take around 50 days.
The announcement comes on the same day Lundin announced it had hit oil offshore Malaysia.