Investigation of waterflood front digitations during immiscible displacements in porous media

In this work, unstable displacements were conducted using special equipment designed to run in-situ CT-scanner experiments. All the displacements were conducted on a homogeneous Bentheimer sandstone plug, of 10 cm in diameter and 40 cm in length. Digitations (or fingering) have been observed under v...

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Autores principales:	Mascle Matthieu, Rosenberg Elisabeth, Roboele Berit, Kowalewski Espen, Youssef Souhail
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Chemical technology TP1-1185 Energy industries. Energy policy. Fuel trade HD9502-9502.5
Acceso en línea:	https://doaj.org/article/4258f423982b4147a10f7d7bfc80bb06
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spelling	oai:doaj.org-article:4258f423982b4147a10f7d7bfc80bb062021-11-08T15:21:30ZInvestigation of waterflood front digitations during immiscible displacements in porous media1294-44751953-818910.2516/ogst/2021053https://doaj.org/article/4258f423982b4147a10f7d7bfc80bb062021-01-01T00:00:00Zhttps://ogst.ifpenergiesnouvelles.fr/articles/ogst/full_html/2021/01/ogst210126/ogst210126.htmlhttps://doaj.org/toc/1294-4475https://doaj.org/toc/1953-8189In this work, unstable displacements were conducted using special equipment designed to run in-situ CT-scanner experiments. All the displacements were conducted on a homogeneous Bentheimer sandstone plug, of 10 cm in diameter and 40 cm in length. Digitations (or fingering) have been observed under varying conditions of injection flowrate, displaced fluid viscosity, and core wettability. They have been characterized at both the core scale, using the core average oil saturation and the water breakthrough; and at the local scale, using the local saturations and had-hoc image processing analysis. It was found that the effect of the different flowing conditions on the front digitations could not be interpreted independently. The oil recovery at brine breakthrough showed a good correlation with the viscous fingering number for the water-wet case. However, a different scaling was observed for the oil-wet case. The interplay of the different flowing conditions mitigates the possibility of constructing a unique scaling number to account for all experimental condition. The local saturation monitoring has provided a new insight to characterize the finger shapes and analyze the production mechanisms. It allowed to distinguish two independent contributions to early breakthrough: viscous dominated digitations and capillary dominated digitations. A two-phases diagram has been constructed to plot and compare these contributions for all flowing conditions. Their evolutions show the main production mechanisms during the flooding. We observed that the viscous digitations were not causing phase trapping at core scale: the core is completely swept after breakthrough. For the water-wet case, we found that the local oil recovery of swept zone remained constant before and after breakthrough while for the oil-wet case it is improving during all the water flooding process.Mascle MatthieuRosenberg ElisabethRoboele BeritKowalewski EspenYoussef SouhailEDP SciencesarticleChemical technologyTP1-1185Energy industries. Energy policy. Fuel tradeHD9502-9502.5ENFROil & Gas Science and Technology, Vol 76, p 71 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Chemical technology TP1-1185 Energy industries. Energy policy. Fuel trade HD9502-9502.5
spellingShingle	Chemical technology TP1-1185 Energy industries. Energy policy. Fuel trade HD9502-9502.5 Mascle Matthieu Rosenberg Elisabeth Roboele Berit Kowalewski Espen Youssef Souhail Investigation of waterflood front digitations during immiscible displacements in porous media
description	In this work, unstable displacements were conducted using special equipment designed to run in-situ CT-scanner experiments. All the displacements were conducted on a homogeneous Bentheimer sandstone plug, of 10 cm in diameter and 40 cm in length. Digitations (or fingering) have been observed under varying conditions of injection flowrate, displaced fluid viscosity, and core wettability. They have been characterized at both the core scale, using the core average oil saturation and the water breakthrough; and at the local scale, using the local saturations and had-hoc image processing analysis. It was found that the effect of the different flowing conditions on the front digitations could not be interpreted independently. The oil recovery at brine breakthrough showed a good correlation with the viscous fingering number for the water-wet case. However, a different scaling was observed for the oil-wet case. The interplay of the different flowing conditions mitigates the possibility of constructing a unique scaling number to account for all experimental condition. The local saturation monitoring has provided a new insight to characterize the finger shapes and analyze the production mechanisms. It allowed to distinguish two independent contributions to early breakthrough: viscous dominated digitations and capillary dominated digitations. A two-phases diagram has been constructed to plot and compare these contributions for all flowing conditions. Their evolutions show the main production mechanisms during the flooding. We observed that the viscous digitations were not causing phase trapping at core scale: the core is completely swept after breakthrough. For the water-wet case, we found that the local oil recovery of swept zone remained constant before and after breakthrough while for the oil-wet case it is improving during all the water flooding process.
format	article
author	Mascle Matthieu Rosenberg Elisabeth Roboele Berit Kowalewski Espen Youssef Souhail
author_facet	Mascle Matthieu Rosenberg Elisabeth Roboele Berit Kowalewski Espen Youssef Souhail
author_sort	Mascle Matthieu
title	Investigation of waterflood front digitations during immiscible displacements in porous media
title_short	Investigation of waterflood front digitations during immiscible displacements in porous media
title_full	Investigation of waterflood front digitations during immiscible displacements in porous media
title_fullStr	Investigation of waterflood front digitations during immiscible displacements in porous media
title_full_unstemmed	Investigation of waterflood front digitations during immiscible displacements in porous media
title_sort	investigation of waterflood front digitations during immiscible displacements in porous media
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/4258f423982b4147a10f7d7bfc80bb06
work_keys_str_mv	AT masclematthieu investigationofwaterfloodfrontdigitationsduringimmiscibledisplacementsinporousmedia AT rosenbergelisabeth investigationofwaterfloodfrontdigitationsduringimmiscibledisplacementsinporousmedia AT roboeleberit investigationofwaterfloodfrontdigitationsduringimmiscibledisplacementsinporousmedia AT kowalewskiespen investigationofwaterfloodfrontdigitationsduringimmiscibledisplacementsinporousmedia AT youssefsouhail investigationofwaterfloodfrontdigitationsduringimmiscibledisplacementsinporousmedia
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Investigation of waterflood front digitations during immiscible displacements in porous media

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