Modeling Gaseous CO2 Flow Behavior in Layered Basalts Dimensional Analysis and Aquifer Response

Modeling Gaseous CO2 Flow Behavior in Layered Basalts : Dimensional Analysis and Aquifer Response

© 2021 National Ground Water Association.

Bibliographische Detailangaben
Veröffentlicht in:Ground water. - 1979. - 59(2021), 5 vom: 02. Sept., Seite 677-693
1. Verfasser: D'Aniello, Andrea (VerfasserIn)
Weitere Verfasser: Tómasdóttir, Sigrún, Sigfússon, Bergur, Fabbricino, Massimiliano
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Ground water
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Silicates basalt Carbon Dioxide 142M471B3J
Beschreibung
Zusammenfassung:© 2021 National Ground Water Association.
Particular attention is paid to the risk of carbon dioxide (CO2 ) leakage in geologic carbon sequestration (GCS) operations, as it might lead to the failure of sequestration efforts and to the contamination of underground sources of drinking water. As carbon dioxide would eventually reach shallower formations under its gaseous state, understanding its multiphase flow behavior is essential. To this aim, a hypothetical gaseous leak of carbon dioxide resulting from a well integrity failure of the GCS system in operation at Hellisheiði (CarbFix2) is here modeled. Simulations show that migration of gaseous carbon dioxide is largely affected by formation stratigraphy, intrinsic permeability, and retention properties, whereas the initial groundwater hydraulic gradient (0.0284) has practically no effect. In two different scenarios, about 18.3 and 30.6% of the CO2 that would have been injected by the GCS system for 3 days could be potentially released again into the atmosphere due to a sustained leakage of the same duration. As the gaseous leak occurs, the aquifer experiences high pressure buildups, and the presence of a less conductive layer further magnifies these. Strikingly, the dimensional analysis showed that buoyant and viscous forces can be comparable over time within the predicted gaseous plumes, even far from the leakage source. Local pressure gradients, buoyant, viscous, and capillary forces all play an important role during leakage. Therefore, neglecting one or more of these contributions might lead to a partial prediction of gaseous CO2 flow behavior in the subsurface, giving space to incorrect interpretations and wrong operational choices
Beschreibung:Date Completed 22.09.2021
Date Revised 22.09.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1745-6584
DOI:10.1111/gwat.13090