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Role of partial miscibility on pressure buildup due to constant rate injection of CO2 into closed and open brine aquifers

Mathias, S.A.; Gluyas, J.G.; González Martínez de Miguel, G.J.; Hosseini, S.A.

Role of partial miscibility on pressure buildup due to constant rate injection of CO2 into closed and open brine aquifers Thumbnail


Authors

G.J. González Martínez de Miguel

S.A. Hosseini



Abstract

[1] This work extends an existing analytical solution for pressure buildup because of CO2 injection in brine aquifers by incorporating effects associated with partial miscibility. These include evaporation of water into the CO2 rich phase and dissolution of CO2 into brine and salt precipitation. The resulting equations are closed-form, including the locations of the associated leading and trailing shock fronts. Derivation of the analytical solution involves making a number of simplifying assumptions including: vertical pressure equilibrium, negligible capillary pressure, and constant fluid properties. The analytical solution is compared to results from TOUGH2 and found to accurately approximate the extent of the dry-out zone around the well, the resulting permeability enhancement due to residual brine evaporation, the volumetric saturation of precipitated salt, and the vertically averaged pressure distribution in both space and time for the four scenarios studied. While brine evaporation is found to have a considerable effect on pressure, the effect of CO2 dissolution is found to be small. The resulting equations remain simple to evaluate in spreadsheet software and represent a significant improvement on current methods for estimating pressure-limited CO2 storage capacity.

Citation

Mathias, S., Gluyas, J., González Martínez de Miguel, G., & Hosseini, S. (2011). Role of partial miscibility on pressure buildup due to constant rate injection of CO2 into closed and open brine aquifers. Water Resources Research, 47(12), Article W12525. https://doi.org/10.1029/2011wr011051

Journal Article Type Article
Publication Date Dec 17, 2011
Deposit Date Nov 10, 2011
Publicly Available Date Mar 28, 2024
Journal Water Resources Research
Print ISSN 0043-1397
Electronic ISSN 1944-7973
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 47
Issue 12
Article Number W12525
DOI https://doi.org/10.1029/2011wr011051

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Published Journal Article (545 Kb)
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Copyright Statement
Mathias, S. A., J. G. Gluyas, G. J. Gonza´lez Martnez de Miguel, and S. A. Hosseini (2011), Role of partial miscibility on pressure buildup due to constant rate injection of CO2 into closed and open brine aquifers, Water Resources Research, 47, W12525, 10.1029/2011WR011051 (DOI). To view the published open abstract, go to http://dx.doi.org and enter the DOI.





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