An oil shale formation may be treated using an in situ thermal process.
Heat may be provided to a portion of the formation. Heat may be allowed to
transfer from one or more heat sources to a section of the formation.
Hydrocarbons, H.sub.2, and/or other formation fluids may be produced from
the formation through a production well. Conditions at the production well
may be controlled to inhibit coking at or near the production well.
