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dc.contributor.authorGasda, S. E.
dc.contributor.authorNordbotten, J. M.
dc.contributor.authorCelia, M. A.
dc.date.accessioned2016-02-28T06:44:11Z
dc.date.available2016-02-28T06:44:11Z
dc.date.issued2009-04-23
dc.identifier.citationGasda SE, Nordbotten JM, Celia MA (2009) Vertical equilibrium with sub-scale analytical methods for geological CO2 sequestration. Computational Geosciences 13: 469–481. Available: http://dx.doi.org/10.1007/s10596-009-9138-x.
dc.identifier.issn1420-0597
dc.identifier.issn1573-1499
dc.identifier.doi10.1007/s10596-009-9138-x
dc.identifier.urihttp://hdl.handle.net/10754/600166
dc.description.abstractLarge-scale implementation of geological CO2 sequestration requires quantification of risk and leakage potential. One potentially important leakage pathway for the injected CO2 involves existing oil and gas wells. Wells are particularly important in North America, where more than a century of drilling has created millions of oil and gas wells. Models of CO 2 injection and leakage will involve large uncertainties in parameters associated with wells, and therefore a probabilistic framework is required. These models must be able to capture both the large-scale CO 2 plume associated with the injection and the small-scale leakage problem associated with localized flow along wells. Within a typical simulation domain, many hundreds of wells may exist. One effective modeling strategy combines both numerical and analytical models with a specific set of simplifying assumptions to produce an efficient numerical-analytical hybrid model. The model solves a set of governing equations derived by vertical averaging with assumptions of a macroscopic sharp interface and vertical equilibrium. These equations are solved numerically on a relatively coarse grid, with an analytical model embedded to solve for wellbore flow occurring at the sub-gridblock scale. This vertical equilibrium with sub-scale analytical method (VESA) combines the flexibility of a numerical method, allowing for heterogeneous and geologically complex systems, with the efficiency and accuracy of an analytical method, thereby eliminating expensive grid refinement for sub-scale features. Through a series of benchmark problems, we show that VESA compares well with traditional numerical simulations and to a semi-analytical model which applies to appropriately simple systems. We believe that the VESA model provides the necessary accuracy and efficiency for applications of risk analysis in many CO2 sequestration problems. © 2009 Springer Science+Business Media B.V.
dc.description.sponsorshipThis work was funded in part by a grantto from BP through funding of the Carbon Mitigation Initiativeat Princeton University, and the King Abdullah University ofScience and Technology through a research fellowship for S.Gasda (Award no. KUS-F1-026-41)
dc.publisherSpringer Nature
dc.subjectGeological CO2 sequestration
dc.subjectNumerical simulation
dc.subjectSharp interface models
dc.subjectSub-scale analytical methods
dc.subjectVertical equilibrium method
dc.subjectWellbore leakage
dc.titleVertical equilibrium with sub-scale analytical methods for geological CO2 sequestration
dc.typeArticle
dc.identifier.journalComputational Geosciences
dc.contributor.institutionThe University of North Carolina at Chapel Hill, Chapel Hill, United States
dc.contributor.institutionUniversitetet i Bergen, Bergen, Norway
dc.contributor.institutionPrinceton University, Princeton, United States
kaust.grant.numberKUS-F1-026-41
dc.date.published-online2009-04-23
dc.date.published-print2009-12


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