Saudi Arabia is believed to have about 3% of world oil demand in spare capacity that can be rapidly activated. UAE is another ~1%, and Iraq and Kuwait together another 1%. That alone would replace half of Russia's entire production. Which is exactly why convincing Saudi Arabia to produce more oil could do significant harm to Russia.

Russia disappearing tomorrow wouldn't be a big deal.

Anyway, if you're actually worried about that, you should have been preparing for it years ago. It was obvious to anyone with a brain that Ukraine can defeat Russia, and that Russian oil and gas production is highly vulnerable.

This is just one of dozens of videos of Russian oil infrastructure getting blown up that has come out in the past month: