Test case 17, non-isothermal model: time evolution of (a) total gas pressure, (b) CO₂ partial pressure, (c) gas saturation, (d) water saturation, and (e) CO₂ hydrate saturation at 2, 12, 20, and 40 months after start of injection process. Parameters are as given in Table 1 except initial mole fractions of CO₂ and CH₄ gases which are, x _c0 = 0 and x _m0 = 1 respectively.