Table 1.
General characteristics of the six claystone samples imaged by FIB/SEM [8, 31] and analyzed herein for GBP. Porosity is determined after segmentation by the Yen algorithm available in ImageJ
| Sample name (core no. + number) | Sample orientation | Sample size (μm3) | Voxel size (nm3) | Porosity (%) (Yen segmentation algorithm) | Connectivity |
|---|---|---|---|---|---|
| EST27405-1 | Perpendicular to bedding planes | 53.8 | 8.49×10.78×10 | 2.80 | Yes, only through cracks |
| 0.79 (connected only) | |||||
| EST27405-2 | Perpendicular to bedding planes | 27.8 | 5.94×7.54×10 | 4.90 | Yes, only through cracks |
| 2.10 (connected only) | |||||
| EST26095-1 | Parallel to bedding planes | 146.7 | 8.48×10.77×20 | 1.70 | No |
| 0 (connected only) | |||||
| EST26095-2 | Parallel to bedding planes | 88.9 | 8.48×10.77×20 | 5.90 | Yes no cracks |
| 0.73 (connected only) | |||||
| EST26095-3 | Parallel to bedding planes | 111.4 | 8.49×10.78×20 | 5.21 | No |
| 0 (connected only) | |||||
| Tournemire-1 | Perpendicular to bedding planes | 553.1 | 8.49×10.78×50 | 3.64 (with cracks) 0.68 (connected only) | Yes, only through cracks |