2010
DOI: 10.2516/ogst/2010006
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Integrative Modeling of Caprock Integrity in the Context of CO2Storage: Evolution of Transport and Geochemical Properties and Impact on Performance and Safety Assessment

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Cited by 57 publications
(41 citation statements)
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“…Studies generally show that for a low-permeability caprock, over thousand of years of exposure, only the lowest few meters of the caprock may be affected by the CO 2 -rich fluid, and the effect on hydraulic and mechanical properties appears to be very small (Gaus et al 2005;Ojala 2011;Fleury et al 2010;Hangx et al 2010;Bildstein et al 2010). The potential for CO 2 replacing interlayer water leading to shrinkage of the clay minerals is an open issue (Gaus 2010).…”
Section: Caprock Sealing Performacementioning
confidence: 99%
“…Studies generally show that for a low-permeability caprock, over thousand of years of exposure, only the lowest few meters of the caprock may be affected by the CO 2 -rich fluid, and the effect on hydraulic and mechanical properties appears to be very small (Gaus et al 2005;Ojala 2011;Fleury et al 2010;Hangx et al 2010;Bildstein et al 2010). The potential for CO 2 replacing interlayer water leading to shrinkage of the clay minerals is an open issue (Gaus 2010).…”
Section: Caprock Sealing Performacementioning
confidence: 99%
“…Therefore, even though the injection activity spans tens to hundreds of years, assessments of the post-closure risk in the much longer time scale are needed. The studies of modeling works on caprock integrity are still relatively scarce, and recently some insights on CO 2 -brine-caprock interactions have been gained (Johnson et al, 2004(Johnson et al, , 2005Gaus et al, 2005;Xu et al, 2005;Gherardi et al, 2007;Credoz et al, 2009;Bildstein et al, 2010). Gherardi et al (2007) performed both batch, 1-D, and 2-D reactive transport simulations in the caprock of a depleted gas reservoir for CO 2 sequestration, using the TOUGHREACT code (Xu et al, 2004).…”
Section: Insights From Modeling Workmentioning
confidence: 99%
“…In general, the measured permeabilities are around 1 microDarcy. With such values and using two phase flow simulations [19], it can be shown that the CO 2 migration will be limited to a few meters when the overpressure is maintained during a few hundred years. For carbonated rocks, a low porosity may also play an important role.…”
Section: Discussion Conclusion and Perspectivesmentioning
confidence: 99%