Molecular-scale origins of wettability at petroleum–brine–carbonate interfaces

Abstract Wettability control of carbonates is a central concept for enhanced petroleum recovery, but a mechanistic understanding of the associated molecular-scale chemical processes remains unclear. We directly probe the interface of calcium carbonate (calcite) with natural petroleum oil, synthetic...

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Autores principales:	Paul Fenter, Tianzhu Qin, Sang Soo Lee, Mohammed B. AlOtaibi, Subhash Ayirala, Ali A. Yousef
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a18d757b2e6d4f269b293fbb5493349b
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spelling	oai:doaj.org-article:a18d757b2e6d4f269b293fbb5493349b2021-12-02T12:34:02ZMolecular-scale origins of wettability at petroleum–brine–carbonate interfaces10.1038/s41598-020-77393-42045-2322https://doaj.org/article/a18d757b2e6d4f269b293fbb5493349b2020-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-77393-4https://doaj.org/toc/2045-2322Abstract Wettability control of carbonates is a central concept for enhanced petroleum recovery, but a mechanistic understanding of the associated molecular-scale chemical processes remains unclear. We directly probe the interface of calcium carbonate (calcite) with natural petroleum oil, synthetic petroleum analogues, and aqueous brines to understand the molecular scale behavior at this interface. The calcite–petroleum interface structure is similar whether or not calcite was previously exposed to an aqueous brine, and is characterized by an adsorbed interfacial layer, significant structural changes within the calcite surface, and increased surface roughness. No evidence for an often-assumed thin-brine wetting layer at the calcite–petroleum interface is observed. These features differ from those observed at the calcite–brine interface, and for parallel measurements using model synthetic petroleum mixtures (consisting of representative components, including dodecane, toluene, and asphaltene). Changes to the interface after petroleum displacement by aqueous brines are also discussed.Paul FenterTianzhu QinSang Soo LeeMohammed B. AlOtaibiSubhash AyiralaAli A. YousefNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-12 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Paul Fenter Tianzhu Qin Sang Soo Lee Mohammed B. AlOtaibi Subhash Ayirala Ali A. Yousef Molecular-scale origins of wettability at petroleum–brine–carbonate interfaces
description	Abstract Wettability control of carbonates is a central concept for enhanced petroleum recovery, but a mechanistic understanding of the associated molecular-scale chemical processes remains unclear. We directly probe the interface of calcium carbonate (calcite) with natural petroleum oil, synthetic petroleum analogues, and aqueous brines to understand the molecular scale behavior at this interface. The calcite–petroleum interface structure is similar whether or not calcite was previously exposed to an aqueous brine, and is characterized by an adsorbed interfacial layer, significant structural changes within the calcite surface, and increased surface roughness. No evidence for an often-assumed thin-brine wetting layer at the calcite–petroleum interface is observed. These features differ from those observed at the calcite–brine interface, and for parallel measurements using model synthetic petroleum mixtures (consisting of representative components, including dodecane, toluene, and asphaltene). Changes to the interface after petroleum displacement by aqueous brines are also discussed.
format	article
author	Paul Fenter Tianzhu Qin Sang Soo Lee Mohammed B. AlOtaibi Subhash Ayirala Ali A. Yousef
author_facet	Paul Fenter Tianzhu Qin Sang Soo Lee Mohammed B. AlOtaibi Subhash Ayirala Ali A. Yousef
author_sort	Paul Fenter
title	Molecular-scale origins of wettability at petroleum–brine–carbonate interfaces
title_short	Molecular-scale origins of wettability at petroleum–brine–carbonate interfaces
title_full	Molecular-scale origins of wettability at petroleum–brine–carbonate interfaces
title_fullStr	Molecular-scale origins of wettability at petroleum–brine–carbonate interfaces
title_full_unstemmed	Molecular-scale origins of wettability at petroleum–brine–carbonate interfaces
title_sort	molecular-scale origins of wettability at petroleum–brine–carbonate interfaces
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/a18d757b2e6d4f269b293fbb5493349b
work_keys_str_mv	AT paulfenter molecularscaleoriginsofwettabilityatpetroleumbrinecarbonateinterfaces AT tianzhuqin molecularscaleoriginsofwettabilityatpetroleumbrinecarbonateinterfaces AT sangsoolee molecularscaleoriginsofwettabilityatpetroleumbrinecarbonateinterfaces AT mohammedbalotaibi molecularscaleoriginsofwettabilityatpetroleumbrinecarbonateinterfaces AT subhashayirala molecularscaleoriginsofwettabilityatpetroleumbrinecarbonateinterfaces AT aliayousef molecularscaleoriginsofwettabilityatpetroleumbrinecarbonateinterfaces
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Molecular-scale origins of wettability at petroleum–brine–carbonate interfaces

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