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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Advanced modeling of enhanced CO2 dissolution trapping in saline aquifers
https://orcid.org/0000-0003-0125-5841
https://orcid.org/0000-0002-5399-1755
Abstract A consistent thermodynamic model based on a combination of the Peng-Robinson equation of state for gas components with an activity model for the aqueous phase is utilized in this study to accurately evaluate the performance of geologic CO2 storage in saline aquifers. To account for thermal effects, the phase enthalpy and conductivity are derived with consideration of CO2 dissolution in brines. Several conceptual numerical setups with variations in parameters and physics are constructed to investigate the enhanced CO2 dissolution in saline aquifers. In addition, a realistic geological structure is considered to evaluate the potential for storing CO2 at the field scale. Our simulation results show that the presence of a capillary transition zone (CTZ) can significantly reduce the onset time and enhance the dissolution rate. The temperature has a crucial effect on the dissolution trapping compared to isothermal assumptions. Thermal conduction and convection suspend the onset of mass convection, while the final mass flux is augmented. Heat conduction smears out the temperature difference between rocks and fluids, thus suppressing thermal fingering. We demonstrate that the dissolution trapping in realistic 3D aquifers can be significantly different from their 2D analogues. The field-scale simulation results show that the dissolution rate increases sharply once the convection dominates the CO2 migration which corresponds to a reduction of residual trapping. Besides, a high-resolution 3D model is required for accurately resolving the enhanced CO2 dissolution in realistic heterogeneous reservoirs. An efficient multi-scale framework for an accurate evaluation of CO2 trapping is proposed for this purpose.
Highlights Efficient numerical framework for predicting geologic CO2 storage in saline aquifers. Quantifying capillary pressure and thermal effects via high-resolution simulations. Multi-scale framework for an evaluation of field-scale enhanced CO2 dissolution.
Advanced modeling of enhanced CO2 dissolution trapping in saline aquifers
https://orcid.org/0000-0003-0125-5841
https://orcid.org/0000-0002-5399-1755
Abstract A consistent thermodynamic model based on a combination of the Peng-Robinson equation of state for gas components with an activity model for the aqueous phase is utilized in this study to accurately evaluate the performance of geologic CO2 storage in saline aquifers. To account for thermal effects, the phase enthalpy and conductivity are derived with consideration of CO2 dissolution in brines. Several conceptual numerical setups with variations in parameters and physics are constructed to investigate the enhanced CO2 dissolution in saline aquifers. In addition, a realistic geological structure is considered to evaluate the potential for storing CO2 at the field scale. Our simulation results show that the presence of a capillary transition zone (CTZ) can significantly reduce the onset time and enhance the dissolution rate. The temperature has a crucial effect on the dissolution trapping compared to isothermal assumptions. Thermal conduction and convection suspend the onset of mass convection, while the final mass flux is augmented. Heat conduction smears out the temperature difference between rocks and fluids, thus suppressing thermal fingering. We demonstrate that the dissolution trapping in realistic 3D aquifers can be significantly different from their 2D analogues. The field-scale simulation results show that the dissolution rate increases sharply once the convection dominates the CO2 migration which corresponds to a reduction of residual trapping. Besides, a high-resolution 3D model is required for accurately resolving the enhanced CO2 dissolution in realistic heterogeneous reservoirs. An efficient multi-scale framework for an accurate evaluation of CO2 trapping is proposed for this purpose.
Highlights Efficient numerical framework for predicting geologic CO2 storage in saline aquifers. Quantifying capillary pressure and thermal effects via high-resolution simulations. Multi-scale framework for an evaluation of field-scale enhanced CO2 dissolution.
Advanced modeling of enhanced CO2 dissolution trapping in saline aquifers
https://orcid.org/0000-0003-0125-5841
https://orcid.org/0000-0002-5399-1755
Abstract A consistent thermodynamic model based on a combination of the Peng-Robinson equation of state for gas components with an activity model for the aqueous phase is utilized in this study to accurately evaluate the performance of geologic CO2 storage in saline aquifers. To account for thermal effects, the phase enthalpy and conductivity are derived with consideration of CO2 dissolution in brines. Several conceptual numerical setups with variations in parameters and physics are constructed to investigate the enhanced CO2 dissolution in saline aquifers. In addition, a realistic geological structure is considered to evaluate the potential for storing CO2 at the field scale. Our simulation results show that the presence of a capillary transition zone (CTZ) can significantly reduce the onset time and enhance the dissolution rate. The temperature has a crucial effect on the dissolution trapping compared to isothermal assumptions. Thermal conduction and convection suspend the onset of mass convection, while the final mass flux is augmented. Heat conduction smears out the temperature difference between rocks and fluids, thus suppressing thermal fingering. We demonstrate that the dissolution trapping in realistic 3D aquifers can be significantly different from their 2D analogues. The field-scale simulation results show that the dissolution rate increases sharply once the convection dominates the CO2 migration which corresponds to a reduction of residual trapping. Besides, a high-resolution 3D model is required for accurately resolving the enhanced CO2 dissolution in realistic heterogeneous reservoirs. An efficient multi-scale framework for an accurate evaluation of CO2 trapping is proposed for this purpose.
Highlights Efficient numerical framework for predicting geologic CO2 storage in saline aquifers. Quantifying capillary pressure and thermal effects via high-resolution simulations. Multi-scale framework for an evaluation of field-scale enhanced CO2 dissolution.
Advanced modeling of enhanced CO2 dissolution trapping in saline aquifers
Lyu, Xiaocong (Autor:in) / Voskov, Denis (Autor:in)
07.05.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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