Practice of in-depth profile control at high water cut stage

Fesearch and promotion of deep profile control technology has been launched for many years in Dagang Oilfield to solve the problems of strong heterogeneity and poor water flooding effect.A series of achievements have been made,such as evaluation of profile control agents,decision for occasion of profile control,rapid identification for water flooding situation and process design optimization.These technologies were applied all in scale and remarkable results have been achieved.Deep profile technique was used for more than 640 well times and the efficiency came to 80.3%.44.1×104 tons of oil in total has been recovered.The results show that the deep profile control technology improved the development of oil field effectively and is now one of the most potential technologies for oil recovery in Dagang Oil Field of high water cut and high degree of recovery stage.