DC FieldValueLanguage
dc.contributor.authorHefny, Mahmoud-
dc.contributor.authorQin, Chao Zhong-
dc.contributor.authorSaar, Martin O.-
dc.contributor.authorEbigbo, Anozie-
dc.date.accessioned2022-09-12T07:29:37Z-
dc.date.available2022-09-12T07:29:37Z-
dc.date.issued2020-12-01-
dc.identifier.issn17505836-
dc.description.abstractDepleted oil fields in the Gulf of Suez (Egypt) can serve as geothermal reservoirs for power generation using a CO₂-Plume Geothermal (CPG) system, while geologically sequestering CO₂. This entails the injection of a substantial amount of CO₂ into the highly permeable brine-saturated Nubian Sandstone. Numerical models of two-phase flow processes are indispensable for predicting the CO₂-plume migration at a representative geological scale. Such models require reliable constitutive relationships, including relative permeability and capillary pressure curves. In this study, quasi-static pore-network modelling has been used to simulate the equilibrium positions of fluid–fluid interfaces, and thus determine the capillary pressure and relative permeability curves. Three-dimensional images with a voxel size of 0.65 μm3 of a Nubian Sandstone rock sample have been obtained using Synchrotron Radiation X-ray Tomographic Microscopy. From the images, topological properties of pores/throats were constructed. Using a pore-network model, we performed a sequential primary drainage, main imbibition cycle of quasi-static invasion in order to quantify (1) the CO₂ and brine relative permeability curves, (2) the effect of initial wetting-phase saturation (i.e. the saturation at the point of reversal from drainage to imbibition) on the residual-trapping potential, and (3) study the relative permeability-saturation hysteresis. The results improve our understanding of the potential magnitude of capillary trapping in Nubian Sandstone, essential for future field-scale simulations.de_DE
dc.description.sponsorshipHydromechanikde_DE
dc.language.isoengde_DE
dc.relation.ispartofInternational Journal of Greenhouse Gas Controlde_DE
dc.subjectCarbon capture and storagede_DE
dc.subjectCO₂-plume geothermalde_DE
dc.subjectNubian Sandstone (Egypt)de_DE
dc.subjectPore-network modellingde_DE
dc.subjectResidual trappingde_DE
dc.subjectPhysics - Geophysicsde_DE
dc.titleSynchrotron-based pore-network modeling of two-phase flow in Nubian Sandstone and implications for capillary trapping of carbon dioxidede_DE
dc.typeArticlede_DE
dc.identifier.doi10.1016/j.ijggc.2020.103164-
dc.identifier.scopus2-s2.0-85092443322-
dcterms.bibliographicCitation.volume30de_DE
dcterms.bibliographicCitation.articlenumber103164de_DE
dc.identifier.urlhttp://arxiv.org/abs/2004.06792v1-
local.submission.typeonly-metadatade_DE
dc.description.peerReviewedYesde_DE
dc.type.articleScientific Articlede_DE
item.fulltext_sNo Fulltext-
item.fulltextNo Fulltext-
item.grantfulltextnone-
item.languageiso639-1en-
item.openairetypeArticle-
crisitem.author.deptHydromechanik-
crisitem.author.orcid0000-0003-3972-3786-
crisitem.author.parentorgFakultät für Maschinenbau und Bauingenieurwesen-
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