Research Article
Modelling of Time-Dependent Wellbore Collapse in Hard Brittle Shale Formation under Underbalanced Drilling Condition
Table 2
Relative content of clay minerals.
| Well | Relative content (%) | Interlayer ratio (%) | Illite (I) | Montmorillonite (S) | Illite/montmorillonite (I/S) | Kaolinite (K) | Chlorite (C) |
| W-81 | 49.78 | 0.00 | 12.63 | 6.27 | 31.33 | 15.00 | W-82 | 56.54 | 0.00 | 6.72 | 0.00 | 36.74 | 10.00 | W-96 | 34.47 | 0.00 | 39.74 | 10.62 | 15.17 | 25.00 |
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