A coal 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 may be produced
from the formation through a plurality of production wells. A selected number of
heat sources may be positioned in the formation for each production well.
