What will replace oil wells-?

Yes, geothermal works.
Will the seaflum work as sketched, no.
Read the notes.
"Gravity pushes the water up at a speed of 32 feet per second."
Since when does gravity push anything up ?
Ken

Your link states: "As of 2008, geothermal power supplies less than 1% of the world's energy."

Within 15-20 years oil will no longer be able to sustain the world’s energy needs. You can google annual oil consumption and divide that into known world oil reserves and you will see that we are running out. In fact world oil reserves are being depleted at a rate of 3% a year. You can also compute the energy returns using solar and wind combined compared to the energy return we are now getting from oil. From this you will see that wind and solar combined can never replace the energy return we are now getting from oil.

Having said that it becomes clear that we need to find a replacement for oil in a big way and wind and solar is not the solution. It will help but it can never meet the energy needs of the world.

Having said that.,.,,there is only one other source of energy that can replace oil and that is geothermal. That is why I have presented this energy machine. There is no other way.