Research Article
Assessment of Chemical Effects on Wellbore Stability in Transition Shale Formation
Table 7
Parameters used in the wellbore stability analysis considering the strength degradation due to the chemical effect.
| | Parameters | Values |
| | Shale matrix cohesion, (MPa) | 8 | | Internal friction angle of shale matrix, (°) | 35 | | Bedding plane cohesion, (MPa) | 6 | | Internal friction angle of bedding plane, (°) | 26.25 | | Bedding plane cohesion, (MPa) | 5.2 | | Internal friction angle of bedding plane, (°) | 22.75 |
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