Onset of density-driven instabilities in fractured aquifers

Physical Review. E
Seyed Mostafa Jafari Raad, Hassan Hassanzadeh

Abstract

Linear stability analysis is conducted to study the onset of density-driven convection involved in solubility trapping of CO_{2} in fractured aquifers. The effect of physical properties of a fracture network on the stability of a diffusive boundary layer in a saturated fractured porous media is investigated using the dual porosity concept. Linear stability analysis results show that both fracture interporosity flow and fracture storativity play an important role in the stability behavior of the system. It is shown that a diffusive boundary layer under the gravity field in fractured porous media with lower fracture storativity and/or higher fracture interporosity flow coefficient is more stable. We present scaling relations for the onset of convective instability in fractured aquifers with single and variable matrix block size distribution. These findings improve our understanding of density-driven flow in fractured aquifers and are important in the estimation of potential storage capacity, risk assessment, and storage site characterization and screening.

References

Jun 14, 2003·Science·Klaus S Lackner
May 24, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jeanne Therese H Andres, Silvana S S Cardoso
Mar 15, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·P M J TrevelyanA De Wit
Dec 15, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Seyed Mostafa Jafari Raad, Hassan Hassanzadeh
Feb 17, 2018·Physical Review. E·C MezonP M Adler

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