Research Article
Methane Hydrate Distribution from Prolonged and Repeated Formation in Natural and Compacted Sand Samples: X-Ray CT Observations
Table 1
Summary of tests conducted on the Mount Elbert core.
| | Sample phase no. | Test no. | Formation method | Pressure start (MPa) | Pressure end (MPa) | Temp
(°C) | Time in hydrate stability zone | Time to hydrate formation | Hydrate saturation |
| | 1 | ME1.1 | Pressurization | 4.36
*(5) | 4.14
*(4.6) | 3.34 | 2 days | 13 minutes | 60.3% | | ME1.2 | Cooling | 4.41
*(5.2) | 4.16
*(4.6) | 3.50 | 3 days | 95 minutes | 59.3% |
| | 2 | ME2.1 | Pressurization | 4.83
*(6.1) | 4.58
*(5.6) | 3.99 | 60 days | 9 minutes | 59.5% | | ME2.2 | Cooling |
*a |
*a | ~4 | >42 days |
*a | 60% *b |
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*Equilibrium temperature for methane hydrate at given pressure (°C).
*a A power failure temporarily stopped data logger.
*b Estimated from CT scans.
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