Analysis of the Influence of Fractured Reservoir Heterogeneity and Injection Rate on Oil Displacement Effect

Abstract

Based on the characteristics of actual fractured heterogeneous reservoirs, similarity criteria are designed. This paper carried out physical experiments considering the fracture density and matrix permeability. The heterogeneity of fractured reservoirs and the displacement effect under different injection rates of displacement fluids are studied. The results show that under the same injection rate, the degree of recovery decreases with the increase of
permeability. The average reduction range of different displacement fluids is 6-20%. The degree of recovery increases as the injection rate increases. But the increase will be reduced, and different injection media will be different. This research provides a reliable basis and guiding significance for the rational combination of development layers and the determination of a reasonable injection rate.