Cristin-resultat-ID: 1182549
Sist endret: 13. januar 2016 18:11
NVI-rapporteringsår: 2014
Vitenskapelig artikkel

Vertically averaged equations with variable density for CO2 flow in porous media

  • Odd Andersen
  • Sarah Eileen Gasda og
  • Halvor Møll Nilsen


Transport in Porous Media
ISSN 0169-3913
e-ISSN 1573-1634
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2015
Publisert online: 2014
Trykket: 2015
Volum: 107
Hefte: 1
Sider: 95 - 127
Open Access


Scopus-ID: 2-s2.0-84925521889



Miljøteknologi • Anvendt matematikk

Beskrivelse Beskrivelse


Vertically averaged equations with variable density for CO2 flow in porous media


Carbon capture and storage has been proposed as a viable option to reduce CO 2 emissions. Geological storage of CO 2 where the gas is injected into geological formations for practically indefinite storage, is an integral part of this strategy. Mathematical models and numerical simulations are important tools to better understand the processes taking place underground during and after injection. Due to the very large spatial and temporal scales involved, commercial 3D-based simulators for the petroleum industry quickly become impractical for answering questions related to the long-term fate of injected CO 2 . There is an interest in developing simplified modeling tools that are effective for this type of problem. One approach investigated in recent years is the use of upscaled models based on the assumption of vertical equilibrium (VE). Under this assumption, the simulation problem is essentially reduced from 3D to 2D, allowing much larger models to be considered at the same computational cost. So far, most work on VE models for CO 2 storage has either assumed incompressible CO 2 or only permitted lateral variations in CO 2 density (semi-compressible). In the present work, we propose a way to fully include variable CO 2 density within the VE framework, making it possible to also model vertical density changes. We derive the fine-scale and upscaled equations involved and investigate the resulting effects. In addition, we compare incompressible, semi-compressible, and fully compressible CO 2 flow for some model scenarios, using an in-house, fully-implicit numerical code based on automatic differentiation, implemented using the MATLAB reservoir simulation toolkit.


Odd Andersen

  • Tilknyttet:
    ved Mathematics and Cybernetics ved SINTEF AS
  • Tilknyttet:
    ved Matematisk institutt ved Universitetet i Bergen

Sarah Gasda

Bidragsyterens navn vises på dette resultatet som Sarah Eileen Gasda
  • Tilknyttet:
    ved NORCE Energi ved NORCE Norwegian Research Centre AS

Halvor Møll Nilsen

  • Tilknyttet:
    ved Mathematics and Cybernetics ved SINTEF AS
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