steam-oil ratio — Oil & Gas Glossary
Parameter used to monitor the efficiency of oil production processes based on steam injection. Commonly abbreviated as SOR, it measures the volume of steam required to produce one unit volume of oil. Typical values of SOR for cyclic steam stimulation are in the range of three to eight, while typical SOR values for steam assisted gravitydrainage are in the range
Detailed Explanation
of two to five. The lower the SOR, the more efficiently the steam is utilized and the lower the associated fuel costs.