The Evaluation of the Impact of Wettability Alteration and Oil Relative Permeability Changes With Temperature During Cyclic Steam Injection in Naturally Fractured Reservoirs Using Horizontal Wells

In this communication, first, cyclic steam injection process in an Iranian heavy oil reservoir was simulated using three horizontal wells and the effect of various operational parameters on the performance was studied. This study has been done on the fractured reservoirs, as there are few studies on cyclic steam injection and the effect of temperature changes on the oil relative permeability in such reservoirs. Then, some practical values of irreducible water saturation and residual oil saturation at different temperatures have been considered for study of their effects on the oil recovery and oil relative permeability, because these practical values are so useful for prediction of production performance. The conclusions indicate that irreducible water saturation and residual oil saturation have significant impact on recovery factor and cumulative steam oil ratio. Comparison of four various methods show the difference in calculated oil relative permeability at various water saturations.