All issues Volume 76 (2021) Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles, 76 (2021) 73 Full HTMLAdhesion force values between the cantilever tip and shale surface, measured at nine locations (Fig. 3).
| Spot | Measurement, nN | Mineral | ||
|---|---|---|---|---|
| 1 | 55.5 | 62.0 | 59 | Quartz |
| 2 | 52.8 | 52.8 | 54.5 | Quartz |
| 3 | 30.4 | 34.5 | 29.0 | Clay |
| 4 | 63.7 | 63.7 | 58 | Quartz |
| 5 | 47.8 | 54.6 | 55.2 | Quartz |
| 6 | 42.2 | 39.2 | 43.7 | Clay |
| 7 | 47.8 | 51.1 | 51.1 | Quartz |
| 8 | 61.1 | 58.4 | 60.3 | Quartz |
| 9 | 31.4 | 29.8 | 29.8 | Clay |
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