Test cases 1, 6, and 7: non-isothermal model: time evolution of (a) gas pressure, (b) hydrate saturation at 6 and 36 months of CO₂ injection, (c) schematic showing the difference between P _inj and P _eq, and (d) total mass of CO₂ gas injected after 40 months of injection for three different values of initial reservoir temperature (T _i) in porous layer. Injection parameters are same as given in Table 1 except T _i.