Russia is like 36% of EU gas imports (the cheapest 36% at that), mostly pipeline contracts tied to price of oil.
At the same time we're like 30% of oil imports, but those are sold through oil traders (of which the largest are Trafigura and Glencore), and we don't have our own stable oil futures benchmark, with Urals traded as Brent with discount.
So looking into the situation closely, I don't really buy that "energy weapon" thingie pushed to EU.
Also I'm positive that desintegrated Europe = warring Europe. And there's very little way for Russia to benefit from that, because we tend to be involved into european wars ourselves, and we don't like that shit :)