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| Titel |
A Method for Incorporating Chemical Reactions into Multiphase Flow Models for CO2 Injection |
| VerfasserIn |
M. W. Saaltink, V. Vilarrasa, F. De Gaspari, O. Silva, J. Carrera |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250063090
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| Zusammenfassung |
| CO2 injection in deep saline aquifers involves many different processes, including multiphase
flow, heat and mass transport, rock deformation and minerals precipitation and dissolution.
All these processes are coupled. Therefore, their modeling is difficult and requires complex
computer codes to describe and assess them numerically. We developed a method
for incorporating chemical reactions into multiphase flow codes. It is limited to
chemical systems that can be calculated as a function of the state variables of the
multiphase flow model (e.g. liquid pressure, gas pressure, temperature). It consists of
calculating the chemical composition of this system as a function of these state
variables by means of chemical speciation codes and redefining the components of the
multiphase flow code (e.g., water, CO2). We applied this method to incorporate chemical
reactions of a H2O–CO2–NaCl–CaCO3 system into CodeBright, a code that can
handle multiphase flow, heat transport, mass transport and deformation. We used this
code to model CO2 injection into a saline aquifer containing calcite. The model
could simulate well the interaction between the development of the CO2 bubble,
dissolution of CO2 into the brine, calcite dissolution and density dependent flow. |
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