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dc.contributor.authorMedina, Sandra Constanza
dc.contributor.authorAnjum, Dalaver H.
dc.contributor.authorBehzad, Ali Reza
dc.contributor.authorVilagines, Regis D.
dc.contributor.authorTabatabai, S. Assiyeh Alizadeh
dc.contributor.authorLeiknes, TorOve
dc.date.accessioned2021-05-27T09:00:22Z
dc.date.available2021-05-27T09:00:22Z
dc.date.issued2021-05-26
dc.date.submitted2020-08-03
dc.identifier.citationMedina, S. C., Anjum, D. H., Behzad, A. R., Vilagines, R. D., Tabatabai, A., & Leiknes, T. (2021). Microscopy techniques applied to submicron characterization of oilfield produced water. Journal of Petroleum Science and Engineering, 108930. doi:10.1016/j.petrol.2021.108930
dc.identifier.issn0920-4105
dc.identifier.doi10.1016/j.petrol.2021.108930
dc.identifier.urihttp://hdl.handle.net/10754/669277
dc.description.abstractProduced water (PW) and formation water are complex mixtures of hydrocarbons and water produced at oil and gas upstream facilities. Submicron oil droplets represent a multitude of issues affecting the performance of downstream advanced water treatment processes, such as micro and ultra-filtration processes. Conventional de-oiling technologies do not efficiently remove submicron oil droplets in PW. An accurate characterization of submicron oil droplets and contaminants is required to improve PW treatment technology. In this study, a methodology for visualization and quantification of submicron oil droplets size distribution (DSD), using optical and electron microscopy techniques, was developed. Various microscopy techniques were evaluated, including epifluorescence microscopy (EpiFM), confocal laser scanning microscopy (CLSM), cryogenic scanning and transmission electron microscopy (cryo-SEM and cryo-TEM, respectively). Synthetic PW was used to improve and standardize the sample preparation and characterization methodology. The improved methodology was then tested with two PW samples from different oilfields in the Middle East region. Two methods were developed for the determination of DSD in oilfield PW samples. The first method is suitable for highly polydisperse PW samples with oil droplets larger than 250 nm. This method is based on using low-temperature agarose to immobilize the samples, avoiding coalescence, and allowing clear visualization of the oil droplets at high magnification in EpiFM. The second method is suitable for concentrated PW samples and oil droplets as small as 20 nm in size. This method is based on cryo-TEM with plunge freezing and without the use of agarose for sample immobilization. The agarose-immobilization technique was also applied for sample preparation in cryo-SEM. Cryo-SEM fixation by high-pressure freezing (HPF) preserved the morphology of oil droplets in synthetic oil-concentrated samples and allowed its visualization in a wide range of sizes from 50 nm up to 20 μm.
dc.description.sponsorshipThis work was supported by the King Abdullah University of Science and Technology (KAUST), Kingdom of Saudi Arabia. This research did not receive any specific grant from funding agencies in the public or commercial sector
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S092041052100591X
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Petroleum Science and Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Petroleum Science and Engineering, [, , (2021-05-26)] DOI: 10.1016/j.petrol.2021.108930 . © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleMicroscopy techniques applied to submicron characterization of oilfield produced water
dc.typeArticle
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentElectron Microscopy
dc.contributor.departmentWater Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalJournal of Petroleum Science and Engineering
dc.rights.embargodate2023-05-26
dc.eprint.versionPost-print
dc.contributor.institutionResearch and Development Center, Saudi Arabian Oil Company, Dhahran, 31311, Saudi Arabia.
dc.identifier.pages108930
kaust.personMedina, Sandra Constanza
kaust.personAnjum, Dalaver H.
kaust.personBehzad, Ali Reza
kaust.personTabatabai, Assiyeh
kaust.personLeiknes, TorOve
dc.date.accepted2021-05-06
refterms.dateFOA2021-05-27T09:03:25Z


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