Table 1
Working conditions.
| Triaxial cell | MRI | SXRCT | Microscope | |
|---|---|---|---|---|
| Specimen | Cylindrical (50 mm in diameter; 100 mm in height) | Cylindrical (38 mm in diameter; 76 mm in height) | Cylindrical (38 mm in 4.67; 200 mm in height) | Few sand grains |
| Hydrate formation conditions | Gas pressure: 7 MPa | Gas pressure: 7 MPa | Gas pressure: 7 MPa | Gas pressure: 7 MPa |
| Temperature: 3–5 °C | Temperature: 2 °C | Temperature: 1–2 °C | Temperature: 2 °C | |
| Characterisation | Triaxial compression behaviour | MRI signal intensity (total and 1D profile) | 3D images of X-ray attenuation | Optical images |
| Compressional wave velocities | ||||
| Test duration | Several days | Several days | Several days | Several hours |
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