Dissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties

Abstract Despite many efforts into the study of fluids interaction in low salinity water flooding, they are not probing the basics of transport phenomena between the involved phases. This work is aimed to bring new understanding of fluid–fluid interaction during low salinity water flooding through a...

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Autores principales:	Rasoul Mokhtari, Shahab Ayatollahi
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2018
Materias:	Ionic strength Oil–brine interaction Physical properties Contact time Polar components Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/a8cfcb02de154d8caa23d2d40d066aee
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spelling	oai:doaj.org-article:a8cfcb02de154d8caa23d2d40d066aee2021-12-02T09:24:13ZDissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties10.1007/s12182-018-0275-51672-51071995-8226https://doaj.org/article/a8cfcb02de154d8caa23d2d40d066aee2018-11-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-018-0275-5https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract Despite many efforts into the study of fluids interaction in low salinity water flooding, they are not probing the basics of transport phenomena between the involved phases. This work is aimed to bring new understanding of fluid–fluid interaction during low salinity water flooding through a series of organized experiments in which a crude oil sample with known properties was kept in contact with different brine solutions of various ionic strengths. Measuring brine pH, conductivity and crude oil viscosity and density for a period of 45 days illustrates the strong effect of the contact time and ionic strength on the dissociation of polar components and physical properties of the crude oil and brine. Besides, the interfacial tension (IFT) measurements show that the interfacial interactions are affected by several competitive interfacial processes. By decreasing the ionic strength of the brine, the solubility of naphthenic acids in the aqueous solution increases, and hence, the conductivity and the pH of the aqueous phase decrease. To verify this important finding, UV–Vis spectroscopy and 1H NMR analysis were also performed on aged brine samples. Notably, there is an ionic strength of brine in which the lowest IFT is observed, while the other physical properties are remained relatively unchanged.Rasoul MokhtariShahab AyatollahiKeAi Communications Co., Ltd.articleIonic strengthOil–brine interactionPhysical propertiesContact timePolar componentsScienceQPetrologyQE420-499ENPetroleum Science, Vol 16, Iss 2, Pp 328-343 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ionic strength Oil–brine interaction Physical properties Contact time Polar components Science Q Petrology QE420-499
spellingShingle	Ionic strength Oil–brine interaction Physical properties Contact time Polar components Science Q Petrology QE420-499 Rasoul Mokhtari Shahab Ayatollahi Dissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties
description	Abstract Despite many efforts into the study of fluids interaction in low salinity water flooding, they are not probing the basics of transport phenomena between the involved phases. This work is aimed to bring new understanding of fluid–fluid interaction during low salinity water flooding through a series of organized experiments in which a crude oil sample with known properties was kept in contact with different brine solutions of various ionic strengths. Measuring brine pH, conductivity and crude oil viscosity and density for a period of 45 days illustrates the strong effect of the contact time and ionic strength on the dissociation of polar components and physical properties of the crude oil and brine. Besides, the interfacial tension (IFT) measurements show that the interfacial interactions are affected by several competitive interfacial processes. By decreasing the ionic strength of the brine, the solubility of naphthenic acids in the aqueous solution increases, and hence, the conductivity and the pH of the aqueous phase decrease. To verify this important finding, UV–Vis spectroscopy and 1H NMR analysis were also performed on aged brine samples. Notably, there is an ionic strength of brine in which the lowest IFT is observed, while the other physical properties are remained relatively unchanged.
format	article
author	Rasoul Mokhtari Shahab Ayatollahi
author_facet	Rasoul Mokhtari Shahab Ayatollahi
author_sort	Rasoul Mokhtari
title	Dissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties
title_short	Dissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties
title_full	Dissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties
title_fullStr	Dissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties
title_full_unstemmed	Dissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties
title_sort	dissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties
publisher	KeAi Communications Co., Ltd.
publishDate	2018
url	https://doaj.org/article/a8cfcb02de154d8caa23d2d40d066aee
work_keys_str_mv	AT rasoulmokhtari dissociationofpolaroilcomponentsinlowsalinitywateranditsimpactoncrudeoilbrineinterfacialinteractionsandphysicalproperties AT shahabayatollahi dissociationofpolaroilcomponentsinlowsalinitywateranditsimpactoncrudeoilbrineinterfacialinteractionsandphysicalproperties
_version_	1718398139993423872

Dissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties

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