Assessment of CO2 Storage as Hydrates in Saline Aquifers using Machine Learning Algorithms




6. Conclusions

The challenge of CO2 storage as hydrates in Saline Aquifers was investigated. It was found that the rate of hydrate formation varied linearly or quadratically with respect to Porosity, Permeability, Volumetric Heat Capacity, Reference Pressure (Sea Depth), Rock Thermal Conductivity, as well as Injection Temperature, within the studied ranges. Permeability had a moderate effect on hydrate formation, Injection Temperature, and Rock Conductivity showed almost no effect within the investigated range. However, the hydrate formation rate was significantly more sensitive to changes in Porosity, Reference Pressure, Heat Capacity.

To sum up, our results indicate the possibility of long-term storage of CO2 in Saline Aquifers, although it depends on the reservoir characteristics. However, the results show that hydrate formation rate is strongly dependent on several parameters of the reservoir, which should be thoroughly considered before deciding on possible CO2 storage locations in the form of hydrates.