The company said hydrocarbons were discovered in an exploration well.
"Drilling operations are ongoing and final results are thus not yet available," the company said.
Lundin Petroleum, which holds a 20 percent stake in the project, said last month the Langlitinden prospect may have the potential to contain unrisked, gross prospective resources of 220 million barrels of oil equivalent.
Drilling operations started last month and are expected to continue into March, the companies said.
The Norwegian government estimates its continental shelf holds 88 billion barrels of petroleum reserves.
Vote yes for oil, Scottish energy minister says
Kinder Morgan eyes Maine for gas line