Yes, you have a point, though the reality is even more complicated. There are physical limits to the heat capacity of the rock, and the heat flux into the regi

Yes, you have a point, though the reality is even more complicated. There are physical limits to the heat capacity of the rock, and the heat flux into the region. Deeper wells are not necessarily hotter. Going hotter adds other costs (drilling mud, water=>co2, casement, etc), so its a big multivariate optimization.