Enhanced oil recovery techniques - petrofed.winwinho...

Thermal EOR Process•Steam Flooding Process: In this process, steam iscontinuously introduced into an injection well. When steam isinjected into the reservoir, heat is transferred to the oilbearing formation, reservoir fluids and some of the adjacentcap and base rock. The heat reduces the oil viscosity. Thisincreases the mobility of oil.•As the steam loses heat energy it condenses to yield amixture of steam and hot water. Because of pressure gradienttowards producing well, an oil bank is formed ahead of steamzone. This enables the immobile oil to get produced from thereservoir. In general steam reduces the oil saturation in thesteam zone to very low value (about 10±%. Some oil is alsotransported by steam distillation.