The current daily output of crude oil corresponds to ca 82 million barrels. It is estimated in 2030 it may increase to 120 million barrels a day.
Providing no significant change in extraction technology of crude oil deposits will take place or no gigantic deposits are discovered its reserves estimated at ca 1-2.2 trillion barrels will be exhausted within the next approx. 90 years. It is obvious that compensation for this non-renewable and presently irreplaceable source of energy has to be intensely looked for.