Crude oil mobility and its controlling factors in tight sand reservoirs in northern Songliao Basin, East China
FENG Jun,ZHANG Bowei,FENG Zihui,WANG Yachun,ZHANG Juhe,FU Xiaofei,SUN Yonghe,HUO Qiuli,SHAO Hongmei,ZENG Huasen,QU Bin,CHI Huanyuan
Table 1 NMR analysis data of fluid occurrence in tight reservoir samples.
No. Well Depth/
m		 Lithology Fm. Sedimentary facies Porosity/% Permeability/
10-3 μm2		 Average pore throat radius/nm C
value		 Movable fluid Irreducible fluid
Range/
nm		 Peak/
nm		 Saturation/% Range/
nm		 Peak/
nm		 Saturation/%
1 Long26 1 800.52 Fine
sandstone		 Gaotaizi Inner delta-front 8.5 0.19 121 41.4 28-1 1851 637 71 2-542 41 29
2 Long26 1 800.94 Siltstone Gaotaizi 9.6 0.12 101 36.6 56-5 431 505 59 2-505 68 41
3 Long 26 1 801.44 Siltstone Gaotaizi 7.9 0.15 81 43.4 30-1 411 189 41 2-313 53 59
4 Jin28 2 217.75 Siltstone Gaotaizi 11.1 0.16 88 64.9 52-7 293 326 51 2-372 52 49
5 YX58 2 123.17 Mud-bearing fine sandstone Fuyu Inner delta-front 12.4 0.46 268 31.9 20-7 131 383 65 4-502 50 35
6 YX58 2 124.45 Siltstone Fuyu 10.7 0.17 112 32.5 20-2 614 163 52 2-301 39 48
7 Jin28 2 214.40 Mud-bearing siltstone Gaotaizi Inner delta-front 8.4 0.09 56 65.0 20-2 031 189 23 2-353 40 77
8 Jin28 2 218.35 Argillaceous siltstone Gaotaizi 8.3 0.06 56 39.8 15-1 566 96 20 2-501 39 80
9 Jin 28 2 207.43 Argillaceous siltstone Gaotaizi 6.1 0.03 54 71.7 19-623 140 16 2-204 33 84
10 Long26 1 802.50 Argillaceous siltstone Gaotaizi 5.2 0.02 35 57.8 15-254 59 8 1-147 26 92
11 YX58 2 029.50 Argillaceous siltstone Gaotaizi Shore-
shallow lake		 4.8 0.01 11 60.3 15-191 49 9 3-199 34 91
12 YX58 2 127.15 Argillaceous siltstone Fuyu Outer delta-front 5.1 0.01 12 70.1 15-223 28 6 1-201 11 94