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Geofluids
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2021
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Article
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Tab 2
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Research Article
Integration of NMR and NMRC in the Investigation of the Pore Size Distribution of Tight Sandstone Reservoirs: A Case Study in the Upper Paleozoic of Dongpu Depression
Table 2
Petrophysical parameters and results of FESEM image extracted by PCAS.
Sample
Reservoir types
Helium porosity (%)
Gas permeability (mD)
Region percentage (%)
Pore numbers/mm
2
Average form factor
Probability entropy
1
Type I
7.21
0.0997
7.62
2652
0.5812
0.7384
2
Type I
8.85
0.409
8.56
3089
0.6147
0.7926
3
Type I
7.81
0.332
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/
/
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4
Type I
7.63
0.188
/
/
/
/
6
Type II
5.93
0.0803
/
/
/
/
7
Type II
4.29
0.0601
5.03
3681
0.5093
0.8813
10
Type II
6.19
0.043
7.49
4174
0.4855
0.8601
8
Type III
3.72
0.0479
2.08
1725
0.5122
0.9904
5
Type III
4.36
0.0426
/
/
/
/
9
Type IV
3.16
0.0438
/
/
/
/
11
Type IV
2.13
0.0309
0.46
472
0.4537
0.9913
12
Type IV
2.63
0.0245
0.82
589
0.4662
0.9885