Method for treating a hydrocarbon containing formation

A method of treating a hydrocarbon containing formation, comprising:

• providing steam to at least a portion of a hydrocarbon containing formation from a plurality of locations in a wellbore, wherein the wellbore extends from the surface into the portion of the hydrocarbon formation, and wherein the steam has a higher temperature than the portion of the hydrocarbon containing formation;
• heating the steam in the wellbore by combusting a stream comprising hydrogen sulfide in the wellbore, wherein heat from the combustion transfers to the steam, wherein the steam is heated such that steam provided to the portion at a first location in the wellbore is hotter than steam provided at a second location in the wellbore, and wherein the first location is further along the length of the wellbore, as measured from the surface, than the second location;
• transferring at least a portion of the heat at the first location to at least a portion the hydrocarbon containing formation;
• transferring at least a portion of the heat at the second location to at least a portion of the hydrocarbon formation;
• and
• mobilizing at least a portion of formation fluids in the heated portion of the hydrocarbon formation.