Abstract:

The management-level and enhanced recovery of the complicated fault block oil field were restricted seriously by the complication of structure, the heterogeneity of reservoir properties and the great difference of fluid properties. The development potentialities for the reservoir of the high and low permeability were influenced directly by the fuzzy formation concept and the rude formation division. Since 1997, the Dongxin Oil Production Plant of Shengli Oil Field has used many methods, including subdivision of formation, supplementary injection for the formation which did not have enough injection, and unsteady water-injection, toadjust synthetically the development pattern of the Xin-16 Fault Block. Based on the above measures, the recoverable oil reserve is increased 560,000 ton. The recovery was enhanced to 37.79% from 32.55%. And a complete set of mating techniques and methods were put forward to enhance the recovery for the complicated fault block oil field which is in the stage of super-high water cut. These methodsprovided in this paper will have an important guidance and reference meaning in enhancing the recovery of the complicated fault block oil field

Key words: complex fault block reservoir, subdivision of formation, enhanced recovery