I don`t think anyone can deny that oil will run out eventually, but as geologists cant agree when, or how much is left, that a bit of a red herring.
The American oil industry decreed that worldwide oil production had peaked prior to 1920, and the doom mongers have been wrong ever since.
On-shore oil-wells are abandoned when they still have 60% of their reserves left for economic reasons, and I have no reason to believe that off-shore ones are any different.
UK on-shore wells which were shut are now being looked at or re-drilled as new techniques such as horizontal boring are producing oil from worked-out wells.
Yes, it will `run out` as will coal, but certainly not in my lifetime and probably not in my kids either