The deal will end a guessing game over the real owners of the 240,000 barrels-per-day oil producer. Rosneft had said it sold half of Tomskneft in July after buying the unit in May at a state auction of assets of bankrupt company Yukos.
Tomskneft would become the first Yukos asset that Rosneft has agreed to share. The deal comes days after President Vladimir Putin blessed Gazprom chairman Dmitry Medvedev's candidacy to succeed him at a presidential election next year.
"Tomsk's