"Talley-Frac will employ a ""true"" in situ processing technique to effect recovery of shale oil. Briefly, this process involves fracturing the oil shale using chemical explosives and in-place combustion retorting. Under controlled conditions , a minimum amount of residue kerogen is used in the combustion process - the majority of the recoverable oil will be transported to t be production well region located ahead of the flame front. To sustain and control the combustion process , air (and possibly, a portion of the product gases) will be continuously injected into the retort zone. Since the technique employs no conventional mining and minimal surface perturbation , the degree of environmental impact is less than with other oil shale processing methods."