TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The superposition of heat from two heat sources, pyrolyzes the coal in selected section of formation, and temperature of the selected section is maintained within pyrolysis temperature.Pressure of the formation is controlled as function of temperature, or vice versa.The average heating rate of selected section of formation is controlled to less than 1 degreesC/day during pyrolysis.The selected volume (V) of the formation is heated, and the formation has average heat capacity (Cv).The heating energy per day (Pwr) is given by relation:Pwr = h x V x Cv x rhoB,where h is average heating rate of the formation and rhoB is formation bulk density.The coal is heated at a rate less than 10 degreesC/day.The heat is transferred by conduction, and the coal is heated such the selected portion has thermal conductivity of greater than 0.5 W/m(degreesC).The pressure of the selected section is controlled to 2 bar absolute to inhibit production of fluids having carbon number above 25.A portion of hydrogen in the mixture is recirculated, and portion of mixture produced is hydrogenated using the hydrogen.The hydrogen sulfide and carbon dioxide in non-condensable hydrocarbon are separated and removed.The mixture is produced in the production well, and at least about 7 heat sources are disposed in the formation for each production well.The mixture is separated into a gas stream and liquid stream.The minimum pyrolysis temperature is about 270 degreesC.The pressure is reduced to increase production of condensable hydrocarbons and to reduce API gravity, and is increased to increase production of non-condensable hydrocarbons. Preferred Composition: The obtained mixture comprises (in weight%) condensable hydrocarbons containing olefins (0.1-15) with API gravity of at least 25 degrees, and non-condensable hydrocarbons containing ethene and ethane in molar ratio of 0.001-0.15.The condensable hydrocarbons comprise olefins (0.1-15), less than 1 wt.% of each of nitrogen, oxygen and sulfur, phenols (5-30), aromatic compounds (20 or more), multi-ring aromatics (5 or less), asphaltene (0.3 or less) and cycloalkane (5-30).The non-condensable hydrocarbons comprises 10-80 volume% of hydrogen.The mixture comprises greater than 0.05 wt.% of ammonia.    TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Heat Source: The heat source(s) are electric heaters, surface burners, flameless distributed combustors and/or natural distributed combustors.