This is interesting. Although so far there have been few, if any, sanctions directly targeting the Russian oil&gas industry it appears it is still caught in the crossfire from the financial sanctions that have been broadly imposed.
https://www.bbc.co.uk/news/business-60584798
"On Tuesday, oil trader Trafigura offered a cargo load of Russian crude oil at a record discount of $18.60 per barrel below the market rate for Brent, but could not find a buyer willing to take the risk."
Whilst once failed sale doesn't equate a massive problem it does sound like it could be reflective of an industry trend. For now it looks more like the rising oil&gas prices is benefiting Russia, but how much longer?