"Interfax". "Orsknefteorgsintez" has in 11 months increased oil stock refining by 5.6% Orenburg, December 11. INTERFAX. In January-November of the current year OAO “Orsknefteorgsintez” has refined 4 million 530 thousand tons of oil stock, which is 5.6% more than in the analogous period of the last year, says the press-release of the refinery.