An Experimental Study of the Influence of the Preflush Salinity on Enhanced Oil Recovery Using Silica-Based Nanofluids

The underlying effect of preflush salinity and silica nanofluid (Si-NF) on oil production is examined. The influence of salinity on the stability of Si-NFs is studied. A series of sand-pack floodings evaluating oil production was conducted at different concentrations of preflush salinity (0 to 4 wt....

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Autores principales:	Tola Sreu, Kyuro Sasaki, Yuichi Sugai, Ronald Nguele
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	enhanced oil recovery sand-pack flooding silica nanofluid precipitation sedimentation saline water Technology T
Acceso en línea:	https://doaj.org/article/6cf64fd8415b4c1d93cb932083ae2966
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spelling	oai:doaj.org-article:6cf64fd8415b4c1d93cb932083ae29662021-11-11T15:45:14ZAn Experimental Study of the Influence of the Preflush Salinity on Enhanced Oil Recovery Using Silica-Based Nanofluids10.3390/en142169221996-1073https://doaj.org/article/6cf64fd8415b4c1d93cb932083ae29662021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/6922https://doaj.org/toc/1996-1073The underlying effect of preflush salinity and silica nanofluid (Si-NF) on oil production is examined. The influence of salinity on the stability of Si-NFs is studied. A series of sand-pack floodings evaluating oil production was conducted at different concentrations of preflush salinity (0 to 4 wt.%), followed by the injection of a Si-NF (0.5 wt.%) at the trail of which postflush water was injected. The effluent water and solids were collected and analyzed using X-ray fluorescence (XRF). Interfacial tension (IFT) and contact angle measurements were conducted on the Si-NF in the presence of salinity to confirm the effect. The Si-NF became unstable and formed precipitate in the presence of salinity. The sand-pack flooding showed that when the preflush salinity was increased, the displacement efficiency (<i>E<sub>D</sub></i>) using the Si-NF and postflush injection was increased (<i>E<sub>D</sub></i> = 44%). The XRF of the precipitated effluent revealed that the preflush salinity and Si-NF caused mineral leaching, which triggered pore clogging. The IFT value reduced from 13.3 to 8.2 mN/m, and the wettability was altered to be more strongly water-wet when the salinity increased. The primary mechanisms of oil recovery using the Si-NF after preflush salinity is attributed mainly to the clogging mechanism. This clogging helps block the high-perm area, shift the fluid flow to the oil-trapped zone, and free the oil out. Other contribution mechanisms are IFT reduction and wettability alteration.Tola SreuKyuro SasakiYuichi SugaiRonald NgueleMDPI AGarticleenhanced oil recoverysand-pack floodingsilica nanofluidprecipitationsedimentationsaline waterTechnologyTENEnergies, Vol 14, Iss 6922, p 6922 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	enhanced oil recovery sand-pack flooding silica nanofluid precipitation sedimentation saline water Technology T
spellingShingle	enhanced oil recovery sand-pack flooding silica nanofluid precipitation sedimentation saline water Technology T Tola Sreu Kyuro Sasaki Yuichi Sugai Ronald Nguele An Experimental Study of the Influence of the Preflush Salinity on Enhanced Oil Recovery Using Silica-Based Nanofluids
description	The underlying effect of preflush salinity and silica nanofluid (Si-NF) on oil production is examined. The influence of salinity on the stability of Si-NFs is studied. A series of sand-pack floodings evaluating oil production was conducted at different concentrations of preflush salinity (0 to 4 wt.%), followed by the injection of a Si-NF (0.5 wt.%) at the trail of which postflush water was injected. The effluent water and solids were collected and analyzed using X-ray fluorescence (XRF). Interfacial tension (IFT) and contact angle measurements were conducted on the Si-NF in the presence of salinity to confirm the effect. The Si-NF became unstable and formed precipitate in the presence of salinity. The sand-pack flooding showed that when the preflush salinity was increased, the displacement efficiency (<i>E<sub>D</sub></i>) using the Si-NF and postflush injection was increased (<i>E<sub>D</sub></i> = 44%). The XRF of the precipitated effluent revealed that the preflush salinity and Si-NF caused mineral leaching, which triggered pore clogging. The IFT value reduced from 13.3 to 8.2 mN/m, and the wettability was altered to be more strongly water-wet when the salinity increased. The primary mechanisms of oil recovery using the Si-NF after preflush salinity is attributed mainly to the clogging mechanism. This clogging helps block the high-perm area, shift the fluid flow to the oil-trapped zone, and free the oil out. Other contribution mechanisms are IFT reduction and wettability alteration.
format	article
author	Tola Sreu Kyuro Sasaki Yuichi Sugai Ronald Nguele
author_facet	Tola Sreu Kyuro Sasaki Yuichi Sugai Ronald Nguele
author_sort	Tola Sreu
title	An Experimental Study of the Influence of the Preflush Salinity on Enhanced Oil Recovery Using Silica-Based Nanofluids
title_short	An Experimental Study of the Influence of the Preflush Salinity on Enhanced Oil Recovery Using Silica-Based Nanofluids
title_full	An Experimental Study of the Influence of the Preflush Salinity on Enhanced Oil Recovery Using Silica-Based Nanofluids
title_fullStr	An Experimental Study of the Influence of the Preflush Salinity on Enhanced Oil Recovery Using Silica-Based Nanofluids
title_full_unstemmed	An Experimental Study of the Influence of the Preflush Salinity on Enhanced Oil Recovery Using Silica-Based Nanofluids
title_sort	experimental study of the influence of the preflush salinity on enhanced oil recovery using silica-based nanofluids
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/6cf64fd8415b4c1d93cb932083ae2966
work_keys_str_mv	AT tolasreu anexperimentalstudyoftheinfluenceofthepreflushsalinityonenhancedoilrecoveryusingsilicabasednanofluids AT kyurosasaki anexperimentalstudyoftheinfluenceofthepreflushsalinityonenhancedoilrecoveryusingsilicabasednanofluids AT yuichisugai anexperimentalstudyoftheinfluenceofthepreflushsalinityonenhancedoilrecoveryusingsilicabasednanofluids AT ronaldnguele anexperimentalstudyoftheinfluenceofthepreflushsalinityonenhancedoilrecoveryusingsilicabasednanofluids AT tolasreu experimentalstudyoftheinfluenceofthepreflushsalinityonenhancedoilrecoveryusingsilicabasednanofluids AT kyurosasaki experimentalstudyoftheinfluenceofthepreflushsalinityonenhancedoilrecoveryusingsilicabasednanofluids AT yuichisugai experimentalstudyoftheinfluenceofthepreflushsalinityonenhancedoilrecoveryusingsilicabasednanofluids AT ronaldnguele experimentalstudyoftheinfluenceofthepreflushsalinityonenhancedoilrecoveryusingsilicabasednanofluids
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An Experimental Study of the Influence of the Preflush Salinity on Enhanced Oil Recovery Using Silica-Based Nanofluids

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