Research Article
Pressure-Predicting Model for Ultralow-Permeability Reservoirs considering the Water Absorption Characteristics of Mudstone Formations
Table 1
Basic parameters and compositions of core samples from the inspection wells.
| | Core number | Length (cm) | Diameter (cm) | Permeability (10-3μm2) | Porosity (%) | Mineral type and content (%) | Clay content (%) | | Quartz | Potash feldspar | Soda feldspar |
| | M-1 | 8.2 | 2.5 | 0.012 | 4.2 | 26.6 | 3.2 | 17.6 | 52.6 | | M-2 | 7.8 | 2.5 | 0.016 | 3.3 | 25.7 | 2.8 | 22.9 | 48.6 | | M-3 | 7.4 | 2.5 | 0.015 | 3.2 | 27.2 | 1.7 | 19.4 | 51.7 | | M-4 | 7.6 | 2.5 | 0.009 | 4.7 | 29.1 | 3.2 | 16.6 | 51.1 | | M-5 | 7.7 | 2.5 | 0.007 | 4.2 | 28.6 | 3.9 | 17.7 | 49.8 | | M-6 | 7.8 | 2.5 | 0.011 | 3.8 | 22.8 | 2.2 | 27.4 | 47.6 | | M-7 | 7.9 | 2.5 | 0.006 | 3.9 | 27.2 | 2.4 | 21.6 | 48.8 | | M-8 | 8 | 2.5 | 0.011 | 5.1 | 26.1 | 1.8 | 22.9 | 49.2 | | M-9 | 7.6 | 2.5 | 0.01 | 4.5 | 23.9 | 3.3 | 22.6 | 50.2 | | M-10 | 7.8 | 2.5 | 0.008 | 4.6 | 24.5 | 2.6 | 22.1 | 50.8 | | M-11 | 8.2 | 2.5 | 0.009 | 3.1 | 25.4 | 4.2 | 19.1 | 51.3 | | M-12 | 8.1 | 2.5 | 0.007 | 3.5 | 27.5 | 3.3 | 13.8 | 55.4 | | M-13 | 7.7 | 2.5 | 0.012 | 3.9 | 27.8 | 2.7 | 18.3 | 51.2 | | M-14 | 7.8 | 2.5 | 0.013 | 3.7 | 25.2 | 2.9 | 21.6 | 50.3 | | M-15 | 7.9 | 2.5 | 0.008 | 4.1 | 24.4 | 3.4 | 24.1 | 48.1 | | M-16 | 8.1 | 2.5 | 0.016 | 4.4 | 25.7 | 3.7 | 21.9 | 48.7 | | M-17 | 8 | 2.5 | 0.008 | 3.2 | 24.9 | 4.1 | 21.4 | 49.6 | | M-18 | 7.9 | 2.5 | 0.011 | 4 | 25.7 | 2.6 | 22.5 | 49.2 | | M-19 | 7.8 | 2.5 | 0.006 | 3.8 | 23.6 | 2.3 | 22.9 | 51.2 | | M-20 | 7.9 | 2.5 | 0.014 | 3.6 | 29.2 | 2.1 | 16.4 | 52.3 | | M-21 | 8.2 | 2.5 | 0.006 | 4.5 | 27.1 | 3.1 | 19.1 | 50.7 |
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