Method of moderate water injection and its application in ultra-low permeability oil reservoirs of Yanchang Oilfield, NW China
Xiangzeng WANG,Hailong DANG,Tao GAO
Table 1 Basic parameters of core samples.
Core number Length/
cm		 Diameter/
cm		 Gas permeability/
10-3 μm2		 Porosity/
%
1 5.041 2.51 0.040 3.74
2 5.050 2.51 0.124 6.41
3 5.059 2.50 0.213 8.01
4 5.028 2.50 0.325 8.85
5 5.017 2.51 0.261 8.64
6 5.016 2.50 0.272 8.74
7 5.025 2.51 0.268 8.34
8 5.104 2.51 0.262 8.67
9 5.003 2.51 0.265 8.74
10 5.122 2.50 0.262 8.34
11 4.990 2.51 0.253 8.26
12 5.140 2.51 0.265 9.12
13 5.149 2.51 0.257 8.74
14 5.158 2.50 0.258 8.82
15 5.167 2.51 0.231 8.25
16 5.122 2.50 0.182 8.17
17 5.185 2.51 0.053 5.24