Articles | Volume 7, issue 1
Solid Earth, 7, 37–53, 2016

Special issue: From orogenesis to geoscience in the service of society: the...

Solid Earth, 7, 37–53, 2016

Research article 15 Jan 2016

Research article | 15 Jan 2016

Qualitative and quantitative changes in detrital reservoir rocks caused by CO2–brine–rock interactions during first injection phases (Utrillas sandstones, northern Spain)

E. Berrezueta et al.

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Cited articles

Alonso, J. L., Pulgar, J. A., García-Ramos, J. C., and Barba, P.: Tertiary basins and Alpine tectonics in the Cantabrian Mountains (NW Spain), in: Tertiary basins of Spain: The stratigraphic record of crustal Kinematics, edited by: Friend, P. F. and Dabrio, C. J., Cambridge University Press, Cambridge, 214–227, 1996.
André, L., Audigane, P., Azaroual, M., and Menjoz, A.: Numerical modelling of fluid-rock chemical interactions at the supercritical CO2-liquid interface during CO2 injection into a carbonate reservoir, the Dogger aquifer (Paris Basin, France), Energ. Convers. Manage., 48, 1782–1797, 2007.
Bacci, G., Korre, A., and Durucan, S.: An experimental and numerical investigation into the impact of dissolution/precipitation mechanisms on CO2 injectivity in the wellbore and far field regions, Int. J. Greenh. Gas Con., 5, 579–588, 2011.
Bachu, S.: Sequestration of CO2 in geological media: criteria and approach for site selection in response to climate change, Energ. Convers. Manage., 41, 953–970, 2000.
Benson, S. M. and Cole, D. R.: CO2 sequestration in deep sedimentary formations, Elements, 4, 325–331, 2008.
Short summary
The aim of this article is to describe and interpret qualitative and quantitative changes at the rock matrix scale of Cretaceous sandstones (northern Spain) exposed to supercritical CO2 and brine. Experimental CO2-rich brine injection was performed in a reactor chamber under realistic conditions of deep saline formations (P ≈ 7.8 MPa, T ≈ 38 °C and 24 h exposure time). SEM and optical microscopy, aided by optical image processing and chemical analyses were used to study the rock samples.