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Title: Linking pore-scale interfacial curvature to column-scale capillary pressure

Abstract

Synchrotron-based tomographic datasets of oil-water drainage and imbibition cycles have been analyzed to quantify phase saturations and interfacial curvature as well as connected and disconnected fluid configurations. This allows for close observation of the drainage and imbibition processes, assessment of equilibrium states, and studying the effects of fluid phase disconnection and reconnection on the resulting capillary pressures and interfacial curvatures. Based on this analysis estimates of capillary pressure calculated from interfacial curvature can be compared to capillary pressure measured externally with a transducer. Results show good agreement between curvature-based and transducer-based measurements when connected phase interfaces are considered. Curvature measurements show a strong dependence on whether an interface is formed by connected or disconnected fluid and the time allowed for equilibration. The favorable agreement between curvature-based and transducer-based capillary pressure measurements shows promise for the use of image-based estimates of capillary pressure for interfaces that cannot be probed with external transducers as well as opportunities for a detailed assessment of interfacial curvature during drainage and imbibition.

Authors:
; ;  [1];  [2]
  1. (Oregon State U.)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
National Science Foundation (NSF)
OSTI Identifier:
1047301
Resource Type:
Journal Article
Journal Name:
Adv. Water Resour.
Additional Journal Information:
Journal Volume: 46; Journal Issue: 09, 2012; Journal ID: ISSN 0309-1708
Country of Publication:
United States
Language:
ENGLISH
Subject:
02 PETROLEUM; 42 ENGINEERING; CAPILLARY FLOW; DRAINAGE; EQUILIBRIUM; FLUIDS; INTERFACES; PRESSURE MEASUREMENT; TRANSDUCERS

Citation Formats

Armstrong, Ryan T., Porter, Mark L., Wildenschild, Dorthe, and LANL). Linking pore-scale interfacial curvature to column-scale capillary pressure. United States: N. p., 2012. Web. doi:10.1016/j.advwatres.2012.05.009.
Armstrong, Ryan T., Porter, Mark L., Wildenschild, Dorthe, & LANL). Linking pore-scale interfacial curvature to column-scale capillary pressure. United States. doi:10.1016/j.advwatres.2012.05.009.
Armstrong, Ryan T., Porter, Mark L., Wildenschild, Dorthe, and LANL). Wed . "Linking pore-scale interfacial curvature to column-scale capillary pressure". United States. doi:10.1016/j.advwatres.2012.05.009.
@article{osti_1047301,
title = {Linking pore-scale interfacial curvature to column-scale capillary pressure},
author = {Armstrong, Ryan T. and Porter, Mark L. and Wildenschild, Dorthe and LANL)},
abstractNote = {Synchrotron-based tomographic datasets of oil-water drainage and imbibition cycles have been analyzed to quantify phase saturations and interfacial curvature as well as connected and disconnected fluid configurations. This allows for close observation of the drainage and imbibition processes, assessment of equilibrium states, and studying the effects of fluid phase disconnection and reconnection on the resulting capillary pressures and interfacial curvatures. Based on this analysis estimates of capillary pressure calculated from interfacial curvature can be compared to capillary pressure measured externally with a transducer. Results show good agreement between curvature-based and transducer-based measurements when connected phase interfaces are considered. Curvature measurements show a strong dependence on whether an interface is formed by connected or disconnected fluid and the time allowed for equilibration. The favorable agreement between curvature-based and transducer-based capillary pressure measurements shows promise for the use of image-based estimates of capillary pressure for interfaces that cannot be probed with external transducers as well as opportunities for a detailed assessment of interfacial curvature during drainage and imbibition.},
doi = {10.1016/j.advwatres.2012.05.009},
journal = {Adv. Water Resour.},
issn = {0309-1708},
number = 09, 2012,
volume = 46,
place = {United States},
year = {2012},
month = {10}
}