Imbibition characteristics of sandstone cores with different permeabilities in nanofluids

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

Table 1. Basic parameters of experiment cores

Core No. Diameter/ cm Length/ cm Porosity/ % Permeability/ 10-3 μm2 Saturated oil volume/mL Wettability Core type Y1 2.52 4.67 28.49 1663 6.66 Weak hydrophilic Artificial sandstone Y2 2.50 2.55 19.64 1400 2.47 Weak hydrophilic Artificial sandstone Y3 2.52 3.03 34.60 1250 4.40 Weak hydrophilic Artificial sandstone Y4 2.51 2.88 36.20 1150 4.09 Weak hydrophilic Artificial sandstone Y5 2.52 3.01 34.40 1100 4.47 Weak hydrophilic Artificial sandstone Y6 2.50 5.42 28.77 527 7.68 Weak hydrophilic Artificial sandstone Y7 2.50 3.21 31.78 300/1500 5.03 Weak hydrophilic Artificial sandstone Y8 2.52 2.87 25.93 16.500 3.72 Weak hydrophilic Artificial sandstone Y9 2.53 2.91 10.26 8.150 1.50 Weak hydrophilic Artificial sandstone Y10 2.50 2.58 15.06 0.710 2.80 Hydrophilic Natural sandstone Y11 2.51 4.99 11.95 0.077 1.78 Hydrophilic Natural sandstone Y12 2.51 4.99 10.20 0.013 1.45 Hydrophilic Natural sandstone