Steam Injection in a Waterflooding, Light Oil Reservoir

Steam injection, one of commercial technologies widely used to develop heavy oil reservoir, has brought reservoir engineer’s<br>attention to improve performance of waterflooding, light oil reservoir and enhance its oil recovery. Sarto reservoir, located at<br>the transitional belt in Daqing Oil Field, is the case of steam injection utilized. It is a typical multi-layer sandstone fluvial and<br>deltaic deposit with depth of 1000~1200m, permeability of 500~2000md and porosity of 20~30%, surface oil viscosity of<br>50~100cp @ 50oC, wax content of 25~30% and freezing point of 30~35 °C.