Imbibition characteristics of sandstone cores with different permeabilities in nanofluids

QIU Rundong,GU Chunyuan,XUE Peiyu,XU Dongxing,GU Ming

Table 2. Imbibition and oil drainage effects in nanofluids with different concentrations

Core number Mass concentration of nanofluids/% Imbibition time/h Efficiency of oil discharge/% Y4 0 16 1.0 Y4 0.50 8 61.1 Y3 0.20 16 6.8 Y5 0.30 16 51.4