Turbosina,

I'll make a not very brave prediction here--petroleum won't be replaced in transportation in this century. Oil has too much of a lead in energy density over any foreseeable electrical source. It's something like 20 times more energy-dense than any electrical power source.

The energy density of jet fuel is 12,000 Wh/kg versus the best current rechargeable battery is about 250 Wh/kg. It will take a major breakthrough or nuclear power to replace oil.

GF