Norwegian oil firm Det Norske said it will appeal a government decision to give it a smaller stake in the Johan Sverdrup oilfield than it had been seeking.
The company revealed their plans as it reported lower than expected second quarter earnings for 2015.
Det Norske believes it should have been given a larger share than the percentage proposed by operator Statoil of 11.89%.
Following that estimate, the Ministry of Petroleum and Energy has reduced the stake further to 11.57%.
Chief executive Karl Johnny said: “For Det norske, it is a decisive principle that the ownership interests in Johan Sverdrup are to be distributed according to a combination of volume and
value.
“We do not see this principle reflected in The Ministry of Petroleum & Energy decision on the unitization split.”
The Johan Sverdrup field is estimated to have recoverable resources of between 1.4 and 2.5billion barrels of oil equivalent.
The project could operate for 50 years and is Europe’s costliest offshore energy project.