Research And Field Application Of Profile Control Technology In Kunbei Oilfield

Kun Bei oilfield belongs to low-porosity and low permeability reservoir. In Qie-6 block E31 reservoir, the average porosity is 14.4%, and the average permeability is 35.1mD, the block belongs to low-porosity and low permeability reservoir. In Qie-6 block E1+2 reservoir, the average porosity is 9.1%, and the average permeability is 10.2mD, with natural fracture and man-made fracture; In Qie-6 block E1+2 reservoir, the average porosity is 9.1%, and the average permeability is 10.2mD5 with natural fracture and man-made fracture; Both the Qie-6 block and the Qie-12 block belongs to ultra-low porosity and low permeability reservoir. Kun Bei oilfield shifts to water flooding in 2011. Kunbei oilfield has entered the high water cut stage, vertical and horizontal heterogeneity is serious. As a result, the conflicts of single layer and interlayers are more intensified, and the water flooding efficiency of the injection water is reduced, then the oil recovery is impacted correspondingly.According to the above situation, deep profile control technology is introduced in water injection wells. In view of temperature, degree of mineralization and reservoir characteristics, the profile control agent is filtered and demonstrated particularly by means of experiments. On the basis of the above research, the formation, agent and method of profile controls are optimized and decided. After the field conduct, injection pressure increased; while the intake profile obtains obviously improved and increased 13181 tons of oil.