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| Titel |
From pore- to field-scale modelling of kinetic interface sensitive tracers for monitoring CO2 plume migration in deep saline aquifers |
| VerfasserIn |
Alexandru Bogdan A.C. Tatomir, Matthias Halisch, Aaron Peche, Friedrich Maier, Apoorv Jyoti, Tobias Licha, Jacob Bensabat, Auli Niemi, Martin Sauter |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250111653
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| Publikation (Nr.) |
 EGU/EGU2015-11793.pdf |
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| Zusammenfassung |
| We describe a workflow of modeling kinetic interface sensitive (KIS) tracers for monitoring CO2 plume migration in deep saline aquifers.
Existing CO2 injection and storage sites and a large number of enhanced oil and gas recovery projects have shown that the geological storage of CO2 is a feasible and viable technology. KIS tracers are intended to characterize the CO2-brine interfacial area during the supercritical injection of CO2 into the deep saline aquifers. Based on high resolution micro-CT images representing the complex geometrical characteristics of reservoir samples from Heletz, Israel, a complex high resolution modeling domain is obtained. First, we present an FEM numerical pore-scale two-phase flow model solving Navier-Stokes equations (including the surface tension) to track and quantify the propagating fluid-fluid interfacial area within a porous media REV. Further, the pore-scale modeling results are used to quantify system's specific capillary pressure-wetting phase saturation - interfacial area relationship (pc-Sw-awn). Additionally, the model is used to determine several essential flow and transport parameters (porosity, permeability, dispersivity, etc.) which are compared to the ones from laboratory and field experiments. The workflow includes a procedure to reduce the geometrical degree of complexity based on REV-analysis.
Consequently, the KIS tracer migration and reaction across the interface at the field scale is considered in a second FVM numerical model which is a non-isothermal multiphase multicomponent one. It is determined that the constitutive relationship pc-Sw-awn together with the kinetic rate are the two key parameters for the KIS tracer experiments.
Taken in total, this work provides a realistic way to model KIS tracers in CO2-brine systems by addressing to the pore-and field-scales, and demonstrates that the KIS tracers represent a potential accurate monitoring technique. |
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