It offends conventional wisdom. It will also seem nasty to the doom-sayers, who for decades have predicted an oil scarcity that never came. But the 21st century is very likely to overflow with oil. There are at least three main reasons for this.

First, oil reserves are finite. This is incontrovertible. But even so, no one knows how finite they are. And since we don't know the total amount of oil resources existing underground, it's impossible to calculate the curve of future supply.

The...