Micro- and Nanoscale Pore Structure Characterization of Carbonates from the Xiaoerbulake Formation in the Tarim Basin, Northwest China
Table 1
Pore structure properties from routine core and MIP tests.
Sample no.
Median pore-throat diameter (nm) Volumea
Average pore-throat diameter (nm)
Effective tortuosity
Geometrical tortuosity
Porosity (%)
Porosity# (%)
Permeability (mD)
10-100 nm
>100 nm
10-100 nm
>100 nm
SGT 1-4-3
988
40.3
599
12
1.37
0.51
0.98
0.84
0.0545
SGT 1-7-A
89.4
105
233
9
0.71
0.15
1.35
1.19
0.00233
SGT 4-28-F
7967
37.1
5351
5
4.22
0.14
3.61
1.82
0.00505
SGT 4-30-E
277
149
83
23
2.21
1.20
5.16
2.78
0.0248
SGT 5-47-A
2246
178
436
9
2.19
0.35
3.45
6.71
0.140
SGT 6-49-A
66.3
63.1
589
8
3.05
0.77
0.49
2.30
0.00122
SGT 6-56-2
12.0
12.6
1951
4
2.90
0.83
2.48
1.85
0.463
SHY 1-002-3
456
34.1
989
8
2.07
0.50
1.24
2.08
0.00135
SHY 1-008-2
304
14.5
167
47
1.46
0.78
2.04
1.52
1.14
SHY 1-011-2
92.7
78.6
365
15
1.27
0.37
0.71
3.23
0.0758
SHY 1-018-1
529
84.3
814
9
2.42
0.45
1.09
2.90
0.00448
SHY 3-030-3
4143
403
433
10
1.54
0.23
2.37
1.83
0.00341
SHY 3-041-3
3712
719
489
6
1.46
0.17
1.83
1.27
0.296
SHY 3-098
2644
181
1427
8
2.55
0.23
2.13
2.63
0.0649
SHY 4-091-D
87.3
82.2
167
22
1.61
0.70
2.06
3.02
0.00333
SHY 5-107-3
22.1
120
167
9
2.22
0.57
1.06
2.79
0.0998
SHY 5-108-D
221
205
234
37
1.92
0.77
1.07
1.50
0.0154
SHY 6-133-1
486
234
233
19
1.57
0.45
2.44
2.55
0.00545
aWhen pore-throat diameter corresponds to 50% of total cumulative intrusion volume (by volume); ;. Porosity and permeability obtained from gas (helium) measurements. #Porosity obtained from vacuum saturation (DI water).
