Journal ArticleDOI
Tomographic imaging of three‐phase flow experiments
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TLDR
In this article, the authors describe how CT is used to measure the volume fraction of pore space occupied by up to three discrete phases, such as oil, water, and gas.Abstract:
The medical x‐ray computerized tomography (CT) scanner has proved to be a useful tool for studies of fluid flow in porous media, with particular applications in reservoir engineering and enhanced oil recovery. This paper explains how CT is used to measure the volume fraction of pore space occupied by up to three discrete phases, such as oil, water, and gas. The image processing system, x‐ray transparent high‐pressure flow equipment, choice of fluid dopants, and x‐ray energies are described for scanning of core flood experiments. Examples are given of tertiary miscible carbon dioxide displacements in Berea sandstone.read more
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Journal ArticleDOI
Pore-scale imaging and modelling
Martin J. Blunt,Branko Bijeljic,Hu Dong,Oussama Gharbi,Stefan Iglauer,Peyman Mostaghimi,Adriana Paluszny,Christopher H. Pentland +7 more
TL;DR: Pore-scale imaging and modelling is becoming a routine service in the oil and gas industry as discussed by the authors, and has potential applications in contaminant transport and carbon dioxide storage, which has been shown to transform our understanding of multiphase flow processes.
Journal ArticleDOI
High-resolution X-ray computed tomography in geosciences: A review of the current technology and applications
Veerle Cnudde,Matthieu Boone +1 more
TL;DR: A review of the principle, the advantages and limitations of X-ray CT itself are presented, together with an overview of some current applications of micro-CT in geosciences.
Journal ArticleDOI
X-ray imaging and analysis techniques for quantifying pore-scale structure and processes in subsurface porous medium systems
TL;DR: X-ray microtomographic imaging is a non-destructive technique for quantifying these processes in three dimensions within individual pores, and as reported here, with rapidly increasing spatial and temporal resolution.
Journal ArticleDOI
Real-time 3D imaging of Haines jumps in porous media flow
Steffen Berg,Holger Ott,Stephan A Klapp,Alexander G. Schwing,R. Neiteler,Niels Brussee,A. Makurat,Leon Leu,Leon Leu,Frieder Enzmann,Jens-Oliver Schwarz,Michael Kersten,S. Irvine,S. Irvine,Marco Stampanoni,Marco Stampanoni +15 more
TL;DR: Real-time imaging provided a more detailed fundamental understanding of the elementary processes in porous media, such as hysteresis, snap-off, and nonwetting phase entrapment, and it opens the way for a rigorous process for upscaling based on thermodynamic models.
Journal ArticleDOI
Using X-ray computed tomography in hydrology: systems, resolutions, and limitations
Dorthe Wildenschild,Dorthe Wildenschild,Dorthe Wildenschild,Carlos Manoel Pedro Vaz,Carlos Manoel Pedro Vaz,Mark L. Rivers,Mark L. Rivers,D. Rikard,D. Rikard,B.S.B. Christensen,B.S.B. Christensen +10 more
TL;DR: A combination of advances in experimental techniques and mathematical analysis has made it possible to characterize phase distribution and pore geometry in porous media using non-destructive X-ray computed tomography (CT) as discussed by the authors.
References
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Journal ArticleDOI
Energy-selective reconstructions in X-ray computerized tomography.
TL;DR: It is shown that for any material, complete energy spectral information may be summarized by a few constants which are independent of energy, and a technique is presented which uses simple, low-resolution, energy spectrum measurements and conventional computerized tomography techniques to calculate these constants.
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Principles of computer assisted tomography (CAT) in radiographic and radioisotopic imaging.
Rodney A. Brooks,G Di Chiro +1 more
TL;DR: In this paper, the limitations of present techniques, and new developments and trends are outlined, compared with conventional focal plane tomography, and methods of reconstruction-back projection, iterative reconstruction and analytic reconstruction are described.
Journal ArticleDOI
Photon cross sections from 0.1 keV to 1 MeV for elements Z = 1 to Z = 94*
TL;DR: In this paper, photoelectric and measured photoelectric cross sections from 1 keV to 1 MeV were fitted by a least-squares procedure, and theoretical scattering cross sections were then added to the resulting values to obtain total attenuation coefficients.