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In-situ pore-scale imaging and image-based modelling of capillary trapping for geological storage of CO2

Oren, Pal-Eric; Ruspini, Leonardo C.; Saadatfar, Mohammad; Sok, Robert; Knackstedt, Mark; Herring, Anna

Description

We describe an imaging and pore-scale modelling study of capillary trapping in the Paaratte Sandstone formation in the Otway Basin, Australia. Three-dimensional X-ray computed tomography (micro-CT) was used to characterize the pore structure of the reservoir core. We obtain in-situ pore-scale images of the distribution of CO2:brine analogue fluid pairs (octane:brine) within reservoir samples during low capillary number drainage and imbibition flooding experiments. The images were recorded using...[Show more]

dc.contributor.authorOren, Pal-Eric
dc.contributor.authorRuspini, Leonardo C.
dc.contributor.authorSaadatfar, Mohammad
dc.contributor.authorSok, Robert
dc.contributor.authorKnackstedt, Mark
dc.contributor.authorHerring, Anna
dc.date.accessioned2020-10-27T00:22:45Z
dc.identifier.issn1750-5836
dc.identifier.urihttp://hdl.handle.net/1885/213165
dc.description.abstractWe describe an imaging and pore-scale modelling study of capillary trapping in the Paaratte Sandstone formation in the Otway Basin, Australia. Three-dimensional X-ray computed tomography (micro-CT) was used to characterize the pore structure of the reservoir core. We obtain in-situ pore-scale images of the distribution of CO2:brine analogue fluid pairs (octane:brine) within reservoir samples during low capillary number drainage and imbibition flooding experiments. The images were recorded using time-lapse X-ray micro-tomography at elevated pressure. The observed two-phase fluid distributions are consistent with a water wet system. The micro-CT images are used directly as input to a geometrically accurate quasi-static pore-scale simulation model. The validity of the quasi-static assumption is investigated by comparing on a pore-by-pore basis the simulated and imaged fluid distributions. The pore filling states are in good agreement both for drainage and imbibition displacements and the computed capillary trapping curve agrees with experimental data. This indicate that quasi-static pore-scale physics can be used to obtain averaged or continuum flow properties for low capillary number displacements. We perform a sensitivity study of the impact of the advancing contact angle on capillary trapping. The magnitude of residual trapping increases with decreasing contact angle. Land's trapping coefficient increases with increasing contact angle. We compute capillary pressure and relative permeability scanning curves. Simulated relative permeability hysteresis is compared with that predicted by the industry-standard Carlson's and Killough's models. Killough's model reproduces the simulated data more accurately.
dc.description.sponsorshipThe authors wish to acknowledge financial assistance provided through Australian National Low Emissions Coal Research and Development (ANLEC R&D). ANLEC R&D is supported by Australian Coal Association Low Emissions Technology Limited and the Australian Government through the Clean Energy Initiative.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherElsevier BV
dc.rights© 2019 Elsevier Ltd
dc.sourceInternational Journal of Greenhouse Gas Control
dc.titleIn-situ pore-scale imaging and image-based modelling of capillary trapping for geological storage of CO2
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume87
dc.date.issued2019
local.identifier.absfor040608 - Surfacewater Hydrology
local.identifier.absfor090401 - Carbon Capture Engineering (excl. Sequestration)
local.identifier.ariespublicationu3102795xPUB4116
local.publisher.urlhttps://www.elsevier.com/en-au
local.type.statusPublished Version
local.contributor.affiliationOren, Pal-Eric, College of Science, ANU
local.contributor.affiliationRuspini, Leonardo C., Petricore Norway AS
local.contributor.affiliationSaadatfar, Mohammad, College of Science, ANU
local.contributor.affiliationSok, Robert, College of Science, ANU
local.contributor.affiliationKnackstedt, Mark, College of Science, ANU
local.contributor.affiliationHerring, Anna, College of Science, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage34
local.bibliographicCitation.lastpage43
local.identifier.doi10.1016/j.ijggc.2019.04.017
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
local.identifier.absseo970105 - Expanding Knowledge in the Environmental Sciences
local.identifier.absseo850699 - Energy Storage, Distribution and Supply not elsewhere classified
dc.date.updated2020-07-06T08:21:40Z
local.identifier.scopusID2-s2.0-85065774453
CollectionsANU Research Publications

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