An oil refinery isand exceptionally complex facility where crude oil is processed and refined into moren useful products such as naphtha, gasoline, diesel fuel, asphalt base, heating oil, kerosene, and various other products.  As a resul to of the shear complexity of  the refining process it has been expected that  feed stocks and process compounents could never be balanced, however our resident  expert  has utlized Refinery Stream Modeling techiques to make balance these systems.  Here is a very comprehensive overview of Refinery stream modeling process.