In situ thermal processing of a hydrocarbon containing formation to produce a hydrocarbon condensate

A method of treating a hydrocarbon containing formation in situ, comprising:

• providing heat from one or more heaters to at least a portion of the formation;
• allowing the heat to transfer from at least the portion to a selected section of the formation substantially by conduction of heat;
• pyrolyzing at least some hydrocarbons within the selected section of the formation;
• controlling a pressure within the selected section of the formation, wherein the controlled pressure is at or above a selected value;
• and
• producing a mixture from the formation.

A method of treating a hydrocarbon containing formation in situ, compnisig:

• providing heat from one or more heaters to at least a portion of the formation, wherein the one orntore heaters c onprise at least two heaters;
• allowing the heat to transfer from at least the portion to a part of the formation substantially by conduction of heat;
• pyrolyzing at least some hydrocarbons within the part of the formation, wherein controlled superposition of heat from at least the two heaters pyrolyzes at least some hydrocarbons within the part of the formation;
• controlling a pressure within at least a majority of the part of the formation, wherein the controlled pressure is at or about a selected value;
• and
• producing a mixture from the formation.