“There is no economic oil in Ukraine” (paraphrase)
Maybe at $40/oil.
Ukraine has Europe’s third-largest shale oil and gas reserves at 1.2 trillion cubic meters (tcm) just with gas.
Historically, it was the gas depot of the Soviet Union. Corrupt companies like Biden’s screwed it up. But it’s there for the taking.
You’ve got bad information - there is a large NG deposit in the west of Ukraine which is what you are confusing with crude oil.
The info that there is lots of oil in the Donbas comes from some early Russian propaganda, not from actual fact.