The Saudis have been saying this all along...
Saudi Arabia Calls The End of Russian Oil Prowess
https://oilprice.com/Energy/Crude-Oil/Saudi-Arabia-Calls-The-End-Of-Russias-Oil-Prowess.html
Looks like they need another 5 year plan.
From your link...anticipates that Russia’s oil exports “will have declined heavily if not disappeared” within the next 19 years...
From this article;Saudi Crown Prince Mohammed bin Salman stated in a recent interview with Bloomberg that within the next 19 years, Russia’s role in the oil markets could substantially decrease. He even suggested Moscow might stop exporting oil.
19 years, an odd interval?
Does not mesh with the 5 year plan system.
Must be the lunar calendar the Saudis use?