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Table 1

Parameters and their numerical values used in base case simulation.

Physical meaning Value
Hydration number (N h) 6
Porosity (ϕ) 0.28
Initial temperature of reservoir (T init) 279 K
Initial gas pressure in reservoir (P init) 2.51 MPa
Initial water saturation (S w0) 0.9
Initial hydrate saturation (S h0) 0
Initial gas saturation (S g0) 0.1
Aqueous phase density () 1000 kg/m3
Solid rock phase density () 2675.1 kg/m3
CO2 hydrate phase density () 1100 kg/m3
CO2 hydrate heat capacity () 2220 J/kg K
Perimeter of the cross-section (Pcs) 22 m
Area of the cross-section (Acs) 10 m2
Hydrate formation rate constant (K f) 0.35 m mol/Pa s m2
Specific area of hydrates (A SH) 375 000 m2/m3
Activation energy for CO2 hydrate (∆E) 81 084 J/mol
Aqueous phase viscosity () 1 mPa s
Viscosity of CO2 in gas phase () 1.48 × 10−5 Pa s
Entry capillary pressure (P ec) 5000.0 Pa
Constant for capillary pressure () 0.65
Irreducible gas phase saturation (S gr) 0.0
Irreducible aqueous phase saturation (S lr) 0.2
Relative permeability constant for liquid () 4
Relative permeability constant for gas (n g) 2
CO2 hydrate heat capacity () 2220 J/kg-K
CO2 gas injection pressure (P inj) 4 MPa
CO2 gas injection temperature (T inj) 279 K

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