It's the year 2100, oil reserves are mostly used up. In this hard times Evil Corp has invented time travel and it send back engineers and material to drill for oil in the Creaceous.
The question: Is there oil to be found in the Cretaceous? If so will it be at the same places as on todays Earth?
EDIT: Evil Corp invented timetravel using a rift in spacetime and it ONLY goes back to the Creaceous. So no other possible destinations in time are reachable.