Lundin Petroleum and its partner Gunvor Group have entered a heads of agreement with Rosneft Oil Co. to jointly sell 51% of LLC Petroresurs, Lundin said in a news release.

LLC Petroresurs is the 100% owner of the Lagansky block license located in the Russian part of the Caspian Sea. The Lagansky block license contains the Morskoye discovery with best estimate gross contingent resources of 157 MMboe, the release said. Lundin Petroleum currently has a 70% shareholding in LLC Petroresurs, with Gunvor holding the remaining 30%.

The consideration is related to historical costs spent on the Lagansky block license by Lundin Petroleum and Gunvor, and will be made in deferred payments. After the transaction is completed, Lundin Petroleum will have an indirect 34.3% interest in the Lagansky block licensee through its shareholding in LLC Petroresurs, according to the release.

As part of the agreement, Rosneft and Lundin Petroleum have agreed to investigate possible cooperation in the Norwegian and Russian offshore sectors.