A nice slide From the first Bloomberg report:



Of course the usual caveats like inter alia apply.

“In the short-term, the falling oil price will be a big blow to the economy, especially if it reaches $80 a barrel,” Alexei Kudrin, the finance minister from 2000 to 2011 who helped return Russia’s budget to surplus, said by phone today. “However, in the long run, the sanction will have a more serious impact.”

Russia will require an oil price of about $104 to balance its budget in 2015, Sberbank estimates. Brent crude, a benchmark for more than half the world’s oil including Urals, Russia’s main export blend, declined more than $20 since its 2014 peak in June and traded at about $92 a barrel today. It closed at $92.31 on Oct. 3, the lowest since June 2012.
The oil price might well rise, but every month around the current level will have it's negative impact. Sure, Russia's budget should handle it but it will sap fiancial strenght. I already talked before about the long term harm the sanction plus the counter-sanctions have should do.