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Fast Tracking of Fluid Invasion Using Time-Resolved Neutron Tomography

Jailin, C.; Etxegarai, M.; Tudisco, E. LU ; Hall, S. A. LU and Roux, S. (2018) In Transport in Porous Media 124(1). p.117-135
Abstract

Water flow in a sandstone sample is studied during an experiment in situ in a neutron tomography setup. In this paper, a projection-based methodology for fast tracking of the imbibition front in 3D is presented. The procedure exploits each individual neutron 2D radiograph, instead of the tomographic-reconstructed images, to identify the 4D (space and time) saturation field, offering a much higher time resolution than more standard reconstruction-based methods. Based on strong space and time regularizations of the fluid flow, with an a priori defined space and time shape functions, the front shape is identified at each projection time step. This procedure aiming at a fast tracking the fluid advance is explored through two examples. The... (More)

Water flow in a sandstone sample is studied during an experiment in situ in a neutron tomography setup. In this paper, a projection-based methodology for fast tracking of the imbibition front in 3D is presented. The procedure exploits each individual neutron 2D radiograph, instead of the tomographic-reconstructed images, to identify the 4D (space and time) saturation field, offering a much higher time resolution than more standard reconstruction-based methods. Based on strong space and time regularizations of the fluid flow, with an a priori defined space and time shape functions, the front shape is identified at each projection time step. This procedure aiming at a fast tracking the fluid advance is explored through two examples. The first one shows that the fluid motion that occurs during one single 180(Formula presented.) scan can be resolved at 5 Hz with a sub-pixel accuracy whereas it cannot be unraveled with plain tomographic reconstruction. The second example is composed of 42 radiographs acquired all along a complete fluid invasion in the sample. This experiment uses the very same approach with the additional difficulty of large fluid displacement in between two projections. As compared to the classical approach based on full reconstructions at each invasion stage, the proposed methodology in the studied examples is roughly 300 times faster offering an enhanced time resolution.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
4D in situ measurement, Model-driven inverse problem, Neutron tomography, Pressure-driven flow, Proper generalized decomposition
in
Transport in Porous Media
volume
124
issue
1
pages
117 - 135
publisher
Kluwer
external identifiers
  • scopus:85047425272
ISSN
0169-3913
DOI
10.1007/s11242-018-1055-9
language
English
LU publication?
yes
id
aa6b8b1a-9749-43ad-8c4e-10617ab43439
date added to LUP
2018-06-05 11:21:10
date last changed
2019-02-20 11:19:03
@article{aa6b8b1a-9749-43ad-8c4e-10617ab43439,
  abstract     = {<p>Water flow in a sandstone sample is studied during an experiment in situ in a neutron tomography setup. In this paper, a projection-based methodology for fast tracking of the imbibition front in 3D is presented. The procedure exploits each individual neutron 2D radiograph, instead of the tomographic-reconstructed images, to identify the 4D (space and time) saturation field, offering a much higher time resolution than more standard reconstruction-based methods. Based on strong space and time regularizations of the fluid flow, with an a priori defined space and time shape functions, the front shape is identified at each projection time step. This procedure aiming at a fast tracking the fluid advance is explored through two examples. The first one shows that the fluid motion that occurs during one single 180(Formula presented.) scan can be resolved at 5 Hz with a sub-pixel accuracy whereas it cannot be unraveled with plain tomographic reconstruction. The second example is composed of 42 radiographs acquired all along a complete fluid invasion in the sample. This experiment uses the very same approach with the additional difficulty of large fluid displacement in between two projections. As compared to the classical approach based on full reconstructions at each invasion stage, the proposed methodology in the studied examples is roughly 300 times faster offering an enhanced time resolution.</p>},
  author       = {Jailin, C. and Etxegarai, M. and Tudisco, E. and Hall, S. A. and Roux, S.},
  issn         = {0169-3913},
  keyword      = {4D in situ measurement,Model-driven inverse problem,Neutron tomography,Pressure-driven flow,Proper generalized decomposition},
  language     = {eng},
  month        = {05},
  number       = {1},
  pages        = {117--135},
  publisher    = {Kluwer},
  series       = {Transport in Porous Media},
  title        = {Fast Tracking of Fluid Invasion Using Time-Resolved Neutron Tomography},
  url          = {http://dx.doi.org/10.1007/s11242-018-1055-9},
  volume       = {124},
  year         = {2018},
}