A New Kinetic Assay Method for Effective Scale Inhibitor Concentration Determination with Low Detection Limit

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dc.citation.firstpage3196en_US
dc.citation.issueNumber5en_US
dc.citation.journalTitleSPE Journalen_US
dc.citation.lastpage3205en_US
dc.citation.volumeNumber27en_US
dc.contributor.authorDai, Zhaoyien_US
dc.contributor.authorKo, Saebomen_US
dc.contributor.authorWang, Xinen_US
dc.contributor.authorDai, Chongen_US
dc.contributor.authorPaudyal, Samridhdien_US
dc.contributor.authorZhao, Yueen_US
dc.contributor.authorLi, Weien_US
dc.contributor.authorLeschied, Ciannaen_US
dc.contributor.authorYao, Xuanzhuen_US
dc.contributor.authorLu, Yi-Tsungen_US
dc.contributor.authorKan, Amyen_US
dc.contributor.authorTomson, Masonen_US
dc.date.accessioned2022-11-03T14:38:41Zen_US
dc.date.available2022-11-03T14:38:41Zen_US
dc.date.issued2022en_US
dc.description.abstractScale inhibitors are widely used for mineral scale control in various industries, including oil and gas productions, geothermal energy acquisitions, and heat exchanger scale control to mention a few. In most applications, these scale inhibitors are effective at substoichiometric concentrations (e.g., 1 mg/L or lower), and the optimization of these applications is based on the ability to accurately measure the effective inhibitor concentration at such low concentrations. For example, the continuous treatment injection rate, the squeeze treatment frequency, or the batch treatment schedule need to be optimized to ensure the minimum inhibitor concentration (MIC) is achieved during production. However, the non- or low-phosphorous polymeric scale inhibitor concentration determination is difficult using inductively coupled plasma (ICP)-optic emission spectroscopy/mass spectrometry or ion chromatography, especially at mg/L level concentrations due to their high detection limits. The recently developed hyamine method or high-pressure liquid chromatography (HPLC) method involves intensive labor and high costs. Furthermore, in the complex oilfield operational conditions, the presence of other chemicals (e.g., surfactants, biocides, and corrosion inhibitors), the potential degradation of scale inhibitors and the use of combination scale inhibitors require the measurement of effective scale inhibitor concentration, which cannot be accomplished by the traditional methods. In this study, a new kinetic assay method has been developed to determine the effective scale inhibitor concentration with limits of detection (LODs) less than or around 0.1 mg/L for most cases. This method uses a continuous stirring tank reactor (CSTR) apparatus and is developed based on the linear correlation between the effective inhibition concentration and the measured critical time when laser signal changes. The results show that the inhibitor concentrations of various non- or low-phosphorous polymeric scale inhibitors in synthetic field brine, laboratory solutions, and real oilfield brines can be accurately determined at mg/L level, or lower, with less than 10% error. The method is robust, accurate, and much less time- or labor-consuming than other existing methods especially for non- or low-phosphorous polymeric scale inhibitors.en_US
dc.identifier.citationDai, Zhaoyi, Ko, Saebom, Wang, Xin, et al.. "A New Kinetic Assay Method for Effective Scale Inhibitor Concentration Determination with Low Detection Limit." <i>SPE Journal,</i> 27, no. 5 (2022) SPE: 3196-3205. https://doi.org/10.2118/209808-PA.en_US
dc.identifier.doihttps://doi.org/10.2118/209808-PAen_US
dc.identifier.urihttps://hdl.handle.net/1911/113801en_US
dc.language.isoengen_US
dc.publisherSPEen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by SPEen_US
dc.subject.keywordscale remediationen_US
dc.subject.keywordproduction chemistryen_US
dc.subject.keywordparaffin remediationen_US
dc.subject.keywordhydrate remediationen_US
dc.subject.keywordhydrate inhibitionen_US
dc.subject.keywordwax remediationen_US
dc.subject.keywordwax inhibitionen_US
dc.subject.keywordasphaltene inhibitionen_US
dc.subject.keywordupstream oil & gasen_US
dc.subject.keywordconcentrationen_US
dc.titleA New Kinetic Assay Method for Effective Scale Inhibitor Concentration Determination with Low Detection Limiten_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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