 |
| Titel |
Feedback between reactive transport and convective flow during CO2 migration in a saline aquifer |
| VerfasserIn |
Elena Abarca, Albert Nardi, Fidel Grandia, Jorge Molinero |
| Konferenz |
EGU General Assembly 2013
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250078867
|
|
|
|
|
|
| Zusammenfassung |
| A configuration of denser CO2-enriched brine overlying a lighter water leads to convective flow and the formation of gravity fingers of dense fluid sinking into the resident brine. This process has been acknowledged as an enhancer of supercritical CO2(g) dissolution in saline aquifers. Given the non-linear feedback between reactive transport (dissolution/precipitation), porosity and permeability changes and density driven flow, chemical reactions may affect fingering and convection patterns.
In this work, we use a numerical framework to analyze the interaction between flow and reactive transport processes associated with the dissolution of CO2 in brine in a carbonated aquifer. Fingering of acidic CO2-rich brine leads to non uniform calcite dissolution patterns that result in preferential flow paths that control flow dynamics in later times. The numerical simulations have been performed with a java interface that couples the high performance code COMSOL Multiphysics with the reactive transport code PHREEQC. |
|
|
|
|
|
|