NOVELTY - Insitu treatment of hydrocarbon containing formation (212), involves supplying portion(s) of formation with heat from heat source(s), allowing heat to transfer from heat source(s) to a selected section of the formation, controlling the heat from source(s) such that average temperature within at least a majority of selected section of the formation is less than 375degreesC, and producing a mixture from formation.    USE - For producing ammonia used in fertilizers; hydrogen, hydrocarbon and novel product streams; and synthetic gas from underground hydrocarbon containing formations such as formation containing shale, oil shale, carbonaceous shale, shungites, ferogen, oil, heavy hydrocarbons, asphaltites and natural mineral waxes. Synthetic gas formed can be used as fuel in down hole gas heaters such as flame less combustors, for synthesizing a wide range of organic (phenol and/or substituted phenol) and/or inorganic compounds and energy generation in molten carbonate fuel cell, solid oxide fuel cell and other fuel cells, in catalytic methanation process to produce methane, for production of methanol, gasoline, diesel, fuel, ammonia and middle distillates and also to heat the formation. Hydrogen sulfide separated from the non-condensable hydrocarbon is used for producing sulfuric acid, fertilizer/elemental sulfur. The olefin can be separated and used as feed stock for production of other compounds.    ADVANTAGE - The electrical energy cost associated with heating at least portion of formation with an electric heater is reduced. Hence the method enables economical production of hydrogen, hydrocarbon and/or other products from hydrocarbon containing formation in comparison to heating by conventional method. By controlling formation condition, qualities of the produced fluids are improved. Pyrolysis of a portion of formation produce a uniform permeability through out the portion which results in high recovery efficiency of synthesis gas. The oxidization of hydrocarbon portion(s) in formation, significantly reduces energy input during heating. By using carbon as fuel in the formation, energy cost saving of natural distributed combustor is enabled. Production of hydrocarbon fluids having low API gravity value is inhibited.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (i) Insitu method for heating hydrocarbon containing formation;    (ii) Insitu method for producing hydrogen from hydrocarbon containing formation;    (iii) Method for forming or installing heater wells in hydrocarbon containing formation;    (iv) System configured to heat a hydrocarbon containing formation;    (v) A mixture such as condensable mixture produced from a portion of hydrocarbon containing formation;    (vi) Method for insitu production of synthetic gas from hydrocarbon containing formation;    (vii) Method for forming spent portion of formation within hydrocarbon containing formation;    (viii) Method of sequestering carbon dioxide within hydrocarbon containing formation;    (ix) Method for insitu production of energy from hydrocarbon containing formation;    (x) Method for producing ammonia using a carbon containing formation.    DESCRIPTION OF DRAWING(S) - The figure shows several heater wells formed in hydrocarbon containing formation.    Hydrocarbon containing formation (212)