A hydrocarbon containing formation may be treated using an in situ thermal process.
A mixture of hydrocarbons, H2, and/or other formation fluids may be
produced from the formation. Heat may be applied to the formation to raise a temperature
of a portion of the formation to a pyrolysis temperature. The mixture produced
from the formation may have a relatively high hydrogen partial pressure, and a
large portion of the pressure within the formation may be attributable to hydrogen
partial pressure.
