Gazprom Neft, Mubadala Petroleum and the Russian Direct Investment Fund (RDIF) on Sept. 5 announced the completion of a transaction establishing a joint venture to develop oil fields in the Tomsk and Omsk Regions of Western Siberia.

Gazprom Neft has now completed its sale of a 49% interest in Gazpromneft-Vostok LLC, operator of 13 fields, to Mubadala Petroleum and RDIF. Following the completion of this transaction Gazprom Neft now holds a 51% interest in the joint venture, with Mubadala Petroleum and RDIF holding 44% and 5% equity, respectively. Gazpromneft-Vostok remains a subsidiary of Gazprom Neft, and will continue to operate the fields.

The Gazpromneft-Vostok joint venture represents Mubadala Petroleum’s first investment in the Russian oil and gas sector.

The partners will determine the long-term strategy of the joint-venture, focusing on efficiency in exploration and production activities at the fields as well as at pre-Jurassic hydrocarbon deposits.