Research Article
Effects of Irreducible Fluid Saturation and Gas Entry Pressure on Gas Production from Hydrate-Bearing Clayey Silt Sediments by Depressurization
Table 1
Main hydrate reservoir properties and conditions in site SH2.
| Overburden layer thickness, | 30 m | Underlying layer thickness, | 30 m | HBL thickness, | 40 m | Completion interval () | 20 m (in the middle of HBL) | Borehole radius | 0.1 m | Initial pressure, (at base of HBL) | 14.97 MPa | Initial temperature, (at base of HBL) | 14.87 °C | Gas composition | CH4 | Porosity, (all formations) | 38% | Initial saturation in the HBL | , | Intrinsic permeability, (all formations) | 10 mD | Water salinity (mass fraction) | 3.05% | Grain density, (all formations) | 2600 kg/m3 | Dry thermal conductivity, (all formations) | 1.0 W/m/°C | Wet thermal conductivity, (all formations) | 3.1 W/m/°C | Composite thermal conductivity model | | Capillary pressure model |
| | 0.45 | Relative permeability model | | | 3.572 [38] | | 3.572 [38] |
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