Russia's revenue from sales of crude oil and oil products declined in August to one of the lowest levels seen since the start of the conflict in Ukraine, the International Energy Agency said on Thursday.
Russia's energy industry has been challenged by Ukrainian drone strikes on oil refineries and export pipelines as well as Western sanctions.
The IEA said the revenues fell by $920 million from July to $13.51 billion following a decline in crude oil and fuel exports as well as the widening discount to the Russian flagship Urals oil blend's price to around $56 per barrel, below the Western-imposed price cap of $60 per barrel.
"Russia's oil export revenues remain near five-year lows, reducing tax revenues and exacerbating Russia's economic slowdown," the Paris-based IEA said.
Russian oil and fuel exports eased by 70,000 barrels per day to 7.3 million bpd in August as crude fell 30,000 bpd and products 40,000 bpd, according to the agency.
The IEA also said that Russian oil production declined last month by 30,000 bpd to 9.3 million bpd, in line with the output quotas set by the Organization of the Petroleum Exporting Countries and its allies, a group, known as OPEC+.
In earlier September, the price cap for UK, Swiss and EU companies transporting Russian crude and providing services fell to $47.60 per barrel.
According to the IEA, Kazakhstan's crude oil supply dipped 50,000 barrels per day from July last month to 1.8 million bpd amid exports disruptions and an oil spill at the Black Sea terminal, which handles Caspian Pipeline Consortium supplies.
The level was above Kazakhstan's quota of 1.53 million bpd for August under a deal agreed with producer group OPEC+.
Based on Reuters calculations and source-based information, Kazakhstan's daily crude oil output, excluding gas condensate, a type of light oil, rose to 1.88 million bpd in August from 1.84 million bpd in July.
(Reporting by Olesya Astakhova and Vladimir Soldatkin, Editing by Louise Heavens)