Geometry-coupled reactive fluid transport at the fracture scale -Application to CO 2 geologic storage

Handle URI:
http://hdl.handle.net/10754/575506
Title:
Geometry-coupled reactive fluid transport at the fracture scale -Application to CO 2 geologic storage
Authors:
Kim, Seunghee; Santamarina, Carlos ( 0000-0001-8708-2827 )
Abstract:
Water acidification follows CO2 injection and leads to reactive fluid transport through pores and rock fractures, with potential implications to reservoirs and wells in CO2 geologic storage and enhanced oil recovery. Kinetic rate laws for dissolution reactions in calcite and anorthite are combined with Navier-Stokes law and advection-diffusion transport to perform geometry-coupled numerical simulations in order to study the evolution of chemical reactions, species concentration and fracture morphology. Results are summarized as a function of two dimensionless parameters: the Damköhler number Da which is the ratio between advection and reaction times, and the transverse Peclet number Pe defined as the ratio between the time for diffusion across the fracture and the time for advection along the fracture. Reactant species are readily consumed near the inlet in a carbonate reservoir when the flow velocity is low (low transverse Peclet number and Da>10-1). At high flow velocities, diffusion fails to homogenize the concentration field across the fracture (high transverse Peclet number Pe>10-1). When the reaction rate is low as in anorthite reservoirs (Da<10-1) reactant species are more readily transported towards the outlet. At a given Peclet number, a lower Damköhler number causes the flow channel to experience a more uniform aperture enlargement along the length of the fracture. When the length-to-aperture ratio is sufficiently large, say l/d>30, the system response resembles the solution for 1-D reactive fluid transport. A decreased length-to-aperture ratio slows the diffusive transport of reactant species to the mineral fracture surface, and analyses of fracture networks must take into consideration both the length and slenderness of individual fractures in addition to Pe and Da numbers.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Geometry-coupled reactive fluid transport at the fracture scale -Application to CO 2 geologic storage 2015:n/a Geofluids
Publisher:
Wiley-Blackwell
Journal:
Geofluids
Issue Date:
19-Aug-2015
DOI:
10.1111/gfl.12152
Type:
Article
ISSN:
14688115
Additional Links:
http://doi.wiley.com/10.1111/gfl.12152
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Seungheeen
dc.contributor.authorSantamarina, Carlosen
dc.date.accessioned2015-08-23T10:33:12Zen
dc.date.available2015-08-23T10:33:12Zen
dc.date.issued2015-08-19en
dc.identifier.citationGeometry-coupled reactive fluid transport at the fracture scale -Application to CO 2 geologic storage 2015:n/a Geofluidsen
dc.identifier.issn14688115en
dc.identifier.doi10.1111/gfl.12152en
dc.identifier.urihttp://hdl.handle.net/10754/575506en
dc.description.abstractWater acidification follows CO2 injection and leads to reactive fluid transport through pores and rock fractures, with potential implications to reservoirs and wells in CO2 geologic storage and enhanced oil recovery. Kinetic rate laws for dissolution reactions in calcite and anorthite are combined with Navier-Stokes law and advection-diffusion transport to perform geometry-coupled numerical simulations in order to study the evolution of chemical reactions, species concentration and fracture morphology. Results are summarized as a function of two dimensionless parameters: the Damköhler number Da which is the ratio between advection and reaction times, and the transverse Peclet number Pe defined as the ratio between the time for diffusion across the fracture and the time for advection along the fracture. Reactant species are readily consumed near the inlet in a carbonate reservoir when the flow velocity is low (low transverse Peclet number and Da>10-1). At high flow velocities, diffusion fails to homogenize the concentration field across the fracture (high transverse Peclet number Pe>10-1). When the reaction rate is low as in anorthite reservoirs (Da<10-1) reactant species are more readily transported towards the outlet. At a given Peclet number, a lower Damköhler number causes the flow channel to experience a more uniform aperture enlargement along the length of the fracture. When the length-to-aperture ratio is sufficiently large, say l/d>30, the system response resembles the solution for 1-D reactive fluid transport. A decreased length-to-aperture ratio slows the diffusive transport of reactant species to the mineral fracture surface, and analyses of fracture networks must take into consideration both the length and slenderness of individual fractures in addition to Pe and Da numbers.en
dc.language.isoenen
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://doi.wiley.com/10.1111/gfl.12152en
dc.rightsThis is the peer reviewed version of the following article: Kim, Seunghee, and J. Carlos Santamarina. "Geometry‐coupled reactive fluid transport at the fracture scale‐Application to CO2 geologic storage." Geofluids (2015), which has been published in final form at http://doi.wiley.com/10.1111/gfl.12152. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.en
dc.subjectCO2 geologic storageen
dc.subjectMineral dissolutionen
dc.subjectReactive fluid transporten
dc.subjectRock fractureen
dc.subjectNavier-Stokes lawen
dc.titleGeometry-coupled reactive fluid transport at the fracture scale -Application to CO 2 geologic storageen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalGeofluidsen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Civil and Environmental Engineering; Western New England University; Springfield Massachusetts USAen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorSantamarina, Carlosen
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