Dynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media

Abstract Understanding the pore-scale dynamics of two-phase fluid flow in permeable media is important in many processes such as water infiltration in soils, oil recovery, and geo-sequestration of CO2. The two most important processes that compete during the displacement of a non-wetting fluid by a...

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Autores principales:	Kamaljit Singh, Hannah Menke, Matthew Andrew, Qingyang Lin, Christoph Rau, Martin J. Blunt, Branko Bijeljic
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b4d6dc158a2044f0b45cd9e6f7607b29
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spelling	oai:doaj.org-article:b4d6dc158a2044f0b45cd9e6f7607b292021-12-02T15:05:07ZDynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media10.1038/s41598-017-05204-42045-2322https://doaj.org/article/b4d6dc158a2044f0b45cd9e6f7607b292017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05204-4https://doaj.org/toc/2045-2322Abstract Understanding the pore-scale dynamics of two-phase fluid flow in permeable media is important in many processes such as water infiltration in soils, oil recovery, and geo-sequestration of CO2. The two most important processes that compete during the displacement of a non-wetting fluid by a wetting fluid are pore-filling or piston-like displacement and snap-off; this latter process can lead to trapping of the non-wetting phase. We present a three-dimensional dynamic visualization study using fast synchrotron X-ray micro-tomography to provide new insights into these processes by conducting a time-resolved pore-by-pore analysis of the local curvature and capillary pressure. We show that the time-scales of interface movement and brine layer swelling leading to snap-off are several minutes, orders of magnitude slower than observed for Haines jumps in drainage. The local capillary pressure increases rapidly after snap-off as the trapped phase finds a position that is a new local energy minimum. However, the pressure change is less dramatic than that observed during drainage. We also show that the brine-oil interface jumps from pore-to-pore during imbibition at an approximately constant local capillary pressure, with an event size of the order of an average pore size, again much smaller than the large bursts seen during drainage.Kamaljit SinghHannah MenkeMatthew AndrewQingyang LinChristoph RauMartin J. BluntBranko BijeljicNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kamaljit Singh Hannah Menke Matthew Andrew Qingyang Lin Christoph Rau Martin J. Blunt Branko Bijeljic Dynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media
description	Abstract Understanding the pore-scale dynamics of two-phase fluid flow in permeable media is important in many processes such as water infiltration in soils, oil recovery, and geo-sequestration of CO2. The two most important processes that compete during the displacement of a non-wetting fluid by a wetting fluid are pore-filling or piston-like displacement and snap-off; this latter process can lead to trapping of the non-wetting phase. We present a three-dimensional dynamic visualization study using fast synchrotron X-ray micro-tomography to provide new insights into these processes by conducting a time-resolved pore-by-pore analysis of the local curvature and capillary pressure. We show that the time-scales of interface movement and brine layer swelling leading to snap-off are several minutes, orders of magnitude slower than observed for Haines jumps in drainage. The local capillary pressure increases rapidly after snap-off as the trapped phase finds a position that is a new local energy minimum. However, the pressure change is less dramatic than that observed during drainage. We also show that the brine-oil interface jumps from pore-to-pore during imbibition at an approximately constant local capillary pressure, with an event size of the order of an average pore size, again much smaller than the large bursts seen during drainage.
format	article
author	Kamaljit Singh Hannah Menke Matthew Andrew Qingyang Lin Christoph Rau Martin J. Blunt Branko Bijeljic
author_facet	Kamaljit Singh Hannah Menke Matthew Andrew Qingyang Lin Christoph Rau Martin J. Blunt Branko Bijeljic
author_sort	Kamaljit Singh
title	Dynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media
title_short	Dynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media
title_full	Dynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media
title_fullStr	Dynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media
title_full_unstemmed	Dynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media
title_sort	dynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b4d6dc158a2044f0b45cd9e6f7607b29
work_keys_str_mv	AT kamaljitsingh dynamicsofsnapoffandporefillingeventsduringtwophasefluidflowinpermeablemedia AT hannahmenke dynamicsofsnapoffandporefillingeventsduringtwophasefluidflowinpermeablemedia AT matthewandrew dynamicsofsnapoffandporefillingeventsduringtwophasefluidflowinpermeablemedia AT qingyanglin dynamicsofsnapoffandporefillingeventsduringtwophasefluidflowinpermeablemedia AT christophrau dynamicsofsnapoffandporefillingeventsduringtwophasefluidflowinpermeablemedia AT martinjblunt dynamicsofsnapoffandporefillingeventsduringtwophasefluidflowinpermeablemedia AT brankobijeljic dynamicsofsnapoffandporefillingeventsduringtwophasefluidflowinpermeablemedia
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Dynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media

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