Imperial College London
Alternate

Dr. Samuel Krevor

Faculty of Engineering, Department of Earth Science & Engineering

Reader in Carbon Sequestration Studies
 
 
 
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Contact

 

+44 (0)20 7594 2701s.krevor

 
 
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Location

 

1.43Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Boon:2017:10.1002/2016WR019912,
author = {Boon, M and Bijeljic, B and Krevor, S},
doi = {10.1002/2016WR019912},
journal = {Water Resources Research},
pages = {4624--4642},
title = {Observations of the impact of rock heterogeneity on solute spreading and mixing},
url = {http://dx.doi.org/10.1002/2016WR019912},
volume = {53},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Rock heterogeneity plays an important role in solute spreading and mixing in hydrogeologic systems. Few observations, however, have been made that can spatially resolve these processes in 3-D, in consolidated rocks. We make observations of the spatially resolved steady state concentration of a sodium iodide solute while flowing brine through cylindrical rock cores using X-ray CT imaging. Three rocks with an increasing level of heterogeneity are chosen: a Berea sandstone, a Ketton carbonate, and an Indiana carbonate. The impact of heterogeneity on solute transport is analyzed by: (1) quantifying spreading and mixing using metrics such as the transverse dispersion coefficient, the dilution index, the reactor ratio, and the scalar dissipation rate and (2) visualizing and analyzing flow structures such as meandering, flow-focusing, and flow-splitting using isoconcentration contour maps. The transverse dispersion coefficient, Dt, and the variation in Dt throughout the rock core, increases with Peclét number (Pe) and rock heterogeneity. The reactor ratio indicates that mixing is Fickian for the Berea sandstone and Ketton carbonate, but diverges for the Indiana carbonate. The temporal evolution of the scalar dissipation rate, a measure of the mixing rate, remains close to that of Fickian mixing for the Berea and Ketton rocks but not for the Indiana. Heterogeneous rock features are observed to cause meandering, focusing, or splitting of the plume depending on Pe.
AU  - Boon,M
AU  - Bijeljic,B
AU  - Krevor,S
DO  - 10.1002/2016WR019912
EP  - 4642
PY  - 2017///
SN  - 0043-1397
SP  - 4624
TI  - Observations of the impact of rock heterogeneity on solute spreading and mixing
T2  - Water Resources Research
UR  - http://dx.doi.org/10.1002/2016WR019912
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000405997000008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/49510
VL  - 53
ER  -
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