This still will be down by around 9% from September.

Idle primary oil refining capacity is seen declining by 63% next month to 1.642 million tons, according to Reuters calculations.

The decline in offline refining capacity usually leads to a decrease in available crude oil volumes and, subsequently, lower exports.

The offline capacity was increased from the initial plan this month due, in part, to the shutdown extension for the CDU-7 unit for the whole October at Gazprom Neft-owned Omsk oil refinery in Western Siberia.

The Rosneft-owned Saratov refinery in the Volga river also extended maintenance of the CDU-6 unit by 16 days until Oct. 28.

(Reporting by Reuters, Editing by Louise Heavens)