It's a storage tank farm. Likely a couple of large storage tanks will need replacement afterwards. But petrochemical facilities are built by code to withstand fire damage so the concrete and a majority of the tanks will be okay.

Still expensive though. Assuming it was full, a tank of crude oil that size is worth about 30 million dollars even at the extremely depressed sale value that Russia is forced to endure. The lost profit, ie finished products coming out of the shut-down refinery would have been worth much more.

Crude oil is not that expensive. At $64/bbl and 0.15 m3/bbl, a 1000 m3 storage tank filled to the top holds crude worth just about $400k. The tank itself would be something like $2-4 million.

The value in striking that particular refinery, which isn't connected to the oil export ports on the black Sea but serves primarily the Russian military and civilian needs in that region (ie it doesn't earn export money), is in denying fuel to the military. Rostov is the hub for Donbas offensive.

Russia runs a very large army conducting an offensive in the Donbas. The Ukrainian strategy over the past months as far as it pertains to strategic attacks targets rail infrastructure and oil production in Southern Russia in order to slow down and limit the Russian supply effort.

hmm. 🤨 The numbers I found said that typically a crude oil refinery would have an onsite storage capacity up to half a million barrels, and 500K * 60$ is how I got to 30$M. I suppose my mistake was thinking that was "A" tank, when in reality it's many tanks

Yeah they have a lot of tanks. And not all of them would be full. Depending on logistics and production planning, a lot may be empty. Inventory is idle product, like in any industry.