Non-isothermal modeling of CO2 injection into saline aquifers at a low temperature
| Autor: | Jianmei Cheng, Ruirui Zhao |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Hydrology
Global and Planetary Change geography geography.geographical_feature_category Mathematical model Soil Science Geology Aquifer Soil science Pollution Signal Isothermal process Plume chemistry.chemical_compound chemistry Carbon dioxide Transition zone Environmental Chemistry Mass fraction Earth-Surface Processes Water Science and Technology |
| Zdroj: | Environmental Earth Sciences. 73:5307-5316 |
| ISSN: | 1866-6299 1866-6280 |
| Popis: | To investigate the effects of temperature on the CO2 storage in the deep saline aquifers, we set up a 2-D non-isothermal numerical model with simulating the CO2 injection into the aquifers at a low temperature. The evolution of the CO2 plume and the temperature in the aquifer were studied, and using temperature signal to monitor the arrival of CO2 plume was also evaluated. In addition, the deviance of the isothermal model was analyzed. The results show when the cold CO2 is injected into the aquifers, the aquifer can be divided into three zones in the direction away from the injection well during the injection period: temperature drop zone, temperature transition zone, and temperature rise zone. The temperature rise can reach approximately 1 °C in the temperature rise zone during the injection period, which should be enough for the temperature sensor to detect the arrival of the CO2 plume. However, the value of the temperature rise reduces with distance from the injection well. Consequently, we indicate that it is not suitable to monitor the long-term migration of the CO2 plume using temperature signal, especially after the injection stops. The initial formation temperature strongly affects the evolution of the CO2 plume and the temperature distribution after the CO2 injection. Not only the storage is safer, but also using temperature signal to monitor CO2 plume is more feasible in the cold aquifer. The deviance of the isothermal model is small in the mass fraction of dissolved CO2 and the arrival time of CO2 plume throughout the simulation. However, the deviance of pressure buildup is great and increases with time (up to 15 %) during the injection period. The non-isothermal model is necessary to accurately assess the pressure buildup around the injection well during the CO2 injection period. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink