Wettability alteration of calcite oil wells: Influence of smart water ions

Abstract Further enhancement of crude oil recovery in the enhanced recovery stage from calcite oil wells is a major global challenge for oil industry. Experimental results suggest that ions present in sea water, also called smart water, have a significant influence on the wettability alteration (les...

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Autores principales:	Sanjay Prabhakar, Roderick Melnik
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/231bd27143c3417eb1650ebe1958b682
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spelling	oai:doaj.org-article:231bd27143c3417eb1650ebe1958b6822021-12-02T15:06:06ZWettability alteration of calcite oil wells: Influence of smart water ions10.1038/s41598-017-17547-z2045-2322https://doaj.org/article/231bd27143c3417eb1650ebe1958b6822017-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-17547-zhttps://doaj.org/toc/2045-2322Abstract Further enhancement of crude oil recovery in the enhanced recovery stage from calcite oil wells is a major global challenge for oil industry. Experimental results suggest that ions present in sea water, also called smart water, have a significant influence on the wettability alteration (less oil wet) of calcite surface. In this paper, by utilizing Density Functional Theory (DFT) and Quantum Molecular Dynamics (QMD) simulations, we investigate the effect of additive ions of sea water in oil recovery by using acetic acid as a model compound of crude oil molecules. We find that Na+ ions precipitate to the calcite surface and form Na acetate. The binding energy of Na acetate is larger than original oil molecule (acetic acid), which reduces oil recovery. On the other hand, Mg2+ and $${\rm{S}}{{\rm{O}}}_{4}^{2-}$$ S O 4 2 − ions can also reach to the calcite surface in proximity and modify the calcite surface. The binding energy of oil molecule on modified calcite surface is smaller than on pure calcite surface, which enhances oil recovery. Our results might help in understanding interaction among oil, water and additives ions of smart water for further experimental investigations.Sanjay PrabhakarRoderick MelnikNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sanjay Prabhakar Roderick Melnik Wettability alteration of calcite oil wells: Influence of smart water ions
description	Abstract Further enhancement of crude oil recovery in the enhanced recovery stage from calcite oil wells is a major global challenge for oil industry. Experimental results suggest that ions present in sea water, also called smart water, have a significant influence on the wettability alteration (less oil wet) of calcite surface. In this paper, by utilizing Density Functional Theory (DFT) and Quantum Molecular Dynamics (QMD) simulations, we investigate the effect of additive ions of sea water in oil recovery by using acetic acid as a model compound of crude oil molecules. We find that Na+ ions precipitate to the calcite surface and form Na acetate. The binding energy of Na acetate is larger than original oil molecule (acetic acid), which reduces oil recovery. On the other hand, Mg2+ and $${\rm{S}}{{\rm{O}}}_{4}^{2-}$$ S O 4 2 − ions can also reach to the calcite surface in proximity and modify the calcite surface. The binding energy of oil molecule on modified calcite surface is smaller than on pure calcite surface, which enhances oil recovery. Our results might help in understanding interaction among oil, water and additives ions of smart water for further experimental investigations.
format	article
author	Sanjay Prabhakar Roderick Melnik
author_facet	Sanjay Prabhakar Roderick Melnik
author_sort	Sanjay Prabhakar
title	Wettability alteration of calcite oil wells: Influence of smart water ions
title_short	Wettability alteration of calcite oil wells: Influence of smart water ions
title_full	Wettability alteration of calcite oil wells: Influence of smart water ions
title_fullStr	Wettability alteration of calcite oil wells: Influence of smart water ions
title_full_unstemmed	Wettability alteration of calcite oil wells: Influence of smart water ions
title_sort	wettability alteration of calcite oil wells: influence of smart water ions
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/231bd27143c3417eb1650ebe1958b682
work_keys_str_mv	AT sanjayprabhakar wettabilityalterationofcalciteoilwellsinfluenceofsmartwaterions AT roderickmelnik wettabilityalterationofcalciteoilwellsinfluenceofsmartwaterions
_version_	1718388565483716608

Wettability alteration of calcite oil wells: Influence of smart water ions

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