INVESTIGATION ON THE EFFECT OF THE RESERVOIR VARIABLES AND OPERATIONAL PARAMETERS ON SAGD PERFORMANCE

摘要: Steam injection is the most important thermal enhanced oil recovery method. One typical procedure Steam-Assisted Gravity Drainage (SAGD), which a promising process to produce heavy and bitumen. The method ensures stable displacement of steam at economical rates by using gravity as driving force pair horizontal wells for injection/production. There are numerous studies done on SAGD in conventional reservoirs, but majority them focus investigation microscopic scale. In this study, we investigate with preheating period, circulation well field synthetic homogenous model was constructed CMG simulated STARS module. effects operational parameters, such vertical spacing, length, quality production pressure, reservoir variables, rock porosity permeability, vertical-to-horizontal permeability ratio, conductivity formation heat capacity, performance were investigated. results show that period affects mainly initial stages production. Due preheating, communication higher distances also established; therefore, there no considerable difference between productions various spacing cases. As increases, later times increases. At shorter pair, more can be injected per unit length well, but, other hand, recovers less heated area; therefore should optimized all By decreasing bottom-hole near region produced; raises depleted area. simulations very low leads fully unsuccessful process. lower range, effect not so considerable. increases when capacity decrease. Finally main parameters affecting reservoirs listed follows: BHP, porosity, quality, permeability. They carefully accounted any