Urals crude differentials to dated Brent were stable in quiet trade, while Russian domestic refineries are expected to increase runs in August, leaving less oil for exports, Reuters calculations showed on Tuesday.
Russia's offline primary refining capacity for August is expected to reach 3.28 million tonnes, down from 4.1 million tonnes in July, the calculations based on data from industry sources showed.
A decline in idle capacity means that refineries increase runs and use more feedstock to produce fuel, potentially leaving less crude available for export.
Russia's daily oil exports from its western ports are set to be around 1.77 million barrels per day in August, down from 1.93 million bpd in July's plan, Reuters calculations based on data from two sources showed last week.
No bids or offers were made for Urals, Azeri BTC or CPC Blend in the Platts window on Tuesday.
The Indian owners of three vessels chartered to Nayara Energy have asked the Russian-backed firm to end their contracts following recent European Union sanctions on the refiner, six sources familiar with the matter said on Tuesday.
(Reporting by Reuters Editing by Rod Nickel)