The Exquisite Comparison of Shale Mineralogical-Geochemical Characteristics between Chang 7 Member and Chang 9 Member in Yanchang Formation, Ordos Basin
Table 6
Porosity and permeability of the Yanchang shale samples.
Number
Depth (m)
Way of drilling
Member/SM
Length (cm)
Diameter (cm)
Porosity (%)
Permeability (mD)
1
1409.31
Vertical
C7-2SM
4.039
2.489
0.646
0.002933
2
1414.15
Vertical
C7-2SM
5.065
2.494
0.400
0.000961
3
1415.67
Vertical
C7-2SM
2.821
2.497
1.385
0.000927
4
1417.73
Vertical
C7-2SM
2.735
2.492
0.964
0.000331
5
1418.95
Vertical
C7-2SM
3.933
2.494
0.857
0.000303
6
1420.88
Vertical
C7-2SM
2.958
2.492
1.331
0.000501
7
1419.66
Parallel
C7-2SM
2.757
2.494
2.229
0.001192
8
1141.92
Parallel
C7-2SM
2.870
2.460
2.690
0.001634
9
1386.12
Parallel
C7-3SM
4.920
2.458
2.262
0.000468
10
1388.72
Parallel
C7-3SM
2.755
2.478
2.062
0.001002
11
1392.62
Parallel
C7-3SM
2.946
2.496
2.779
0.000201
12
1392.77
Parallel
C7-3SM
2.783
2.479
2.375
0.000178
13
1399.25
Parallel
C7-3SM
2.686
2.482
2.585
0.007016
14
1399.78
Parallel
C7-3SM
3.302
2.490
2.976
0.000047
15
1398.37
Parallel
C7-3SM
3.470
2.490
2.118
0.002029
16
1608.28
Parallel
C7-3SM
2.972
2.483
1.341
0.004561
17
1613.38
Parallel
C7-3SM
3.892
2.494
2.030
0.002188
18
1619.22
Parallel
C7-3SM
3.808
2.492
1.631
0.000664
19
1621.85
Parallel
C7-3SM
4.249
2.499
2.135
0.000197
20
1611.12
Vertical
C7-3SM
4.779
2.491
0.786
0.000068
21
1611.86
Vertical
C7-3SM
2.839
2.489
0.615
0.000535
22
1620.68
Parallel
C7-3SM
2.778
2.495
1.962
0.000428
23
1360.75
Parallel
C9M
3.000
2.470
3.790
0.001289
24
1600.19
Parallel
C9M
2.880
2.480
2.550
0.002533
25
1671.34
Parallel
C9M
2.770
2.470
3.330
0.001781
Vertical: drilling orientation perpendicular to sedimentary stratification. Parallel: drilling orientation parallel to sedimentary stratification.
