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Characterization of capillary pressure–saturation relationships for double-porosity medium using light transmission visualization technique

Capillary pressure saturation (Pc–Sw) relationship plays a central role in the description of fluid flow in porous media. In this research, the light transmission visualization (LTV) technique was applied to characterize the Pc–Sw relationship in a double-porosity medium. Four experiments were condu...

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Main Authors: Alazaiza, Motasem Y. D., Copty, Nadim K., Ngien, S. K., Bob, Mustafa M., Aburas, Maher M.
Format: Article
Language:English
Published: Springer International Publishing 2019
Subjects:
GB Physical geography
QE Geology
TA Engineering (General). Civil engineering (General)
Online Access:http://umpir.ump.edu.my/id/eprint/26802/1/Characterization%20of%20capillary%20pressure%E2%80%93saturation%20relationships%20for%20double-porosity%20.pdf
http://umpir.ump.edu.my/id/eprint/26802/
https://doi.org/10.1007/s11242-019-01322-x
https://doi.org/10.1007/s11242-019-01322-x
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spelling my.ump.umpir.268022020-03-12T08:29:11Z http://umpir.ump.edu.my/id/eprint/26802/ Characterization of capillary pressure–saturation relationships for double-porosity medium using light transmission visualization technique Alazaiza, Motasem Y. D. Copty, Nadim K. Ngien, S. K. Bob, Mustafa M. Aburas, Maher M. GB Physical geography QE Geology TA Engineering (General). Civil engineering (General) Capillary pressure saturation (Pc–Sw) relationship plays a central role in the description of fluid flow in porous media. In this research, the light transmission visualization (LTV) technique was applied to characterize the Pc–Sw relationship in a double-porosity medium. Four experiments were conducted in two-dimensional (2-D) flow chambers packed with a double-porosity medium composed of a mixture of silica sand and sintered kaolin clay spheres. In each experiment, a different volumetric fraction of macropores and micropores was used. The experiment was also repeated by compacting the flow chamber with silica sand only to represent single-porosity medium. Variable saturations of water across the height of the system were applied by controlling the capillary pressure. Images of the 2-D model were collected using a digital camera and analyzed pixel by pixel to determine water saturation in the double-porosity medium. Results from the LTV technique showed that the Pc–Sw relationships for all experiments in double-porosity soil medium were similar in shape but varied depending on the porous media composition. Comparison with the pressure cell test results showed that the Pc–Sw curves for all experiments consistent comparable to those obtained by the LTV technique. The Pc–Sw curves were also fit to van Genuchten model for comparison and validation. For double-porosity media, the best-fit parameters were consistent with published data for sandy clay. Moreover, little variability was observed in the best-fit α and n values for the different double porosity. Overall, this study proves that the LTV technique is a noninvasive laboratory tool that can provide high-resolution spatial data for water saturation distribution in different types of porous media and is capable of producing highly resolved Pc–Sw relationships. Springer International Publishing 2019-08-07 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/26802/1/Characterization%20of%20capillary%20pressure%E2%80%93saturation%20relationships%20for%20double-porosity%20.pdf Alazaiza, Motasem Y. D. and Copty, Nadim K. and Ngien, S. K. and Bob, Mustafa M. and Aburas, Maher M. (2019) Characterization of capillary pressure–saturation relationships for double-porosity medium using light transmission visualization technique. Transport in Porous Media, 130 (2). pp. 513-528. ISSN 0169-3913 https://doi.org/10.1007/s11242-019-01322-x https://doi.org/10.1007/s11242-019-01322-x
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic GB Physical geography
QE Geology
TA Engineering (General). Civil engineering (General)
spellingShingle GB Physical geography
QE Geology
TA Engineering (General). Civil engineering (General)
Alazaiza, Motasem Y. D.
Copty, Nadim K.
Ngien, S. K.
Bob, Mustafa M.
Aburas, Maher M.
Characterization of capillary pressure–saturation relationships for double-porosity medium using light transmission visualization technique
description Capillary pressure saturation (Pc–Sw) relationship plays a central role in the description of fluid flow in porous media. In this research, the light transmission visualization (LTV) technique was applied to characterize the Pc–Sw relationship in a double-porosity medium. Four experiments were conducted in two-dimensional (2-D) flow chambers packed with a double-porosity medium composed of a mixture of silica sand and sintered kaolin clay spheres. In each experiment, a different volumetric fraction of macropores and micropores was used. The experiment was also repeated by compacting the flow chamber with silica sand only to represent single-porosity medium. Variable saturations of water across the height of the system were applied by controlling the capillary pressure. Images of the 2-D model were collected using a digital camera and analyzed pixel by pixel to determine water saturation in the double-porosity medium. Results from the LTV technique showed that the Pc–Sw relationships for all experiments in double-porosity soil medium were similar in shape but varied depending on the porous media composition. Comparison with the pressure cell test results showed that the Pc–Sw curves for all experiments consistent comparable to those obtained by the LTV technique. The Pc–Sw curves were also fit to van Genuchten model for comparison and validation. For double-porosity media, the best-fit parameters were consistent with published data for sandy clay. Moreover, little variability was observed in the best-fit α and n values for the different double porosity. Overall, this study proves that the LTV technique is a noninvasive laboratory tool that can provide high-resolution spatial data for water saturation distribution in different types of porous media and is capable of producing highly resolved Pc–Sw relationships.
format Article
author Alazaiza, Motasem Y. D.
Copty, Nadim K.
Ngien, S. K.
Bob, Mustafa M.
Aburas, Maher M.
author_facet Alazaiza, Motasem Y. D.
Copty, Nadim K.
Ngien, S. K.
Bob, Mustafa M.
Aburas, Maher M.
author_sort Alazaiza, Motasem Y. D.
title Characterization of capillary pressure–saturation relationships for double-porosity medium using light transmission visualization technique
title_short Characterization of capillary pressure–saturation relationships for double-porosity medium using light transmission visualization technique
title_full Characterization of capillary pressure–saturation relationships for double-porosity medium using light transmission visualization technique
title_fullStr Characterization of capillary pressure–saturation relationships for double-porosity medium using light transmission visualization technique
title_full_unstemmed Characterization of capillary pressure–saturation relationships for double-porosity medium using light transmission visualization technique
title_sort characterization of capillary pressure–saturation relationships for double-porosity medium using light transmission visualization technique
publisher Springer International Publishing
publishDate 2019
url http://umpir.ump.edu.my/id/eprint/26802/1/Characterization%20of%20capillary%20pressure%E2%80%93saturation%20relationships%20for%20double-porosity%20.pdf
http://umpir.ump.edu.my/id/eprint/26802/
https://doi.org/10.1007/s11242-019-01322-x
https://doi.org/10.1007/s11242-019-01322-x
_version_ 1662754740413399040
score 13.211869

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