Russian crude processing was broadly unchanged at about 4 million barrels a day from September 10 to 16, according to people familiar with the matter. According to Sina Finance, some facilities were shut after Ukrainian attacks, while other units resumed production, offsetting the overall impact.

During the period, throughput increased at Novatek's Ust-Luga condensate processing plant on the Baltic coast, as well as at the Yaroslavl refinery, which is jointly owned by Gazprom Neft and Rosneft. Throughput also rose at the Ufa refinery operated by Bashneft, a Rosneft unit.

The note said Russia's September 10 to 16 refinery operating data did not include the effects of later attacks, including strikes on the Yaroslavl refinery on September 17, the Moscow refinery on September 20, and the Ufa and Kuibyshev refineries on September 22. Earlier this month, Rosneft's Saratov and Ryazan refineries were shut after attacks, while Tatneft's Taneco complex cut processing load after a September 13 strike.

The Surgutneftegas Kirishi refinery, hit on August 30, and Rosneft's Tuapse refinery, which was attacked several times in April and struck again on May 1, remained offline. Rosneft, Gazprom Neft, Novatek, Surgutneftegas and Tatneft did not immediately respond to Bloomberg's requests for comment.