Abstract: Systems, methods, and heaters for treating a subsurface formation are described herein. At least one method for producing transportation fuel is described herein. The method for producing transportation fuel may include providing formation fluid having a boiling range distribution between ?5° C. and 350° C. from a subsurface in situ heat treatment process to a subsurface treatment facility. A liquid stream may be separated from the formation fluid. The separated liquid stream may be hydrotreated and then distilled to produce a distilled stream having a boiling range distribution between 150° C. and 350° C. The distilled liquid stream may be combined with one or more additives to produce transportation fuel.

Abstract: A fuel composition useful for operating a jet engine or a diesel engine containing a petroleum derived kerosene fuel and a Fischer-Tropsch derived kerosene fuel is provided. The Fischer-Tropsch derived kerosene fuel contains normal and iso-paraffins in a weight ratio of greater than 1:1 and/or the freeze point of the composition is lower than the freeze points of both of the petroleum derived kerosene fuel and the Fischer-Tropsch derived kerosene fuel.