Kazakhstan journal for oil & gas industryKazakhstan journal for oil & gas industry2707-42262957-806XKMG Engineering10871610.54859/kjogi108716Research ArticleStudy of the rheological characteristics of high-viscosity oil from MangyshlakSayenkoOlga B.o.sayenko@kmge.kzSerkebayevaBazargul S.b.serkebayeva@kmge.kzhttps://orcid.org/0000-0002-0288-7210AyapbergenovYerbolat O.e.ayapbergenov@kmge.kzhttps://orcid.org/0000-0003-3133-222XBranch of KMG Engineering LLP KazNIPImunaigaz120720246288983101202410042024Copyright © 2024, Sayenko O.B., Serkebayeva B.S., Ayapbergenov Y.O.2024<p><strong>Background:</strong> Due to the exhaustibility of active reserves of light oil, every year it becomes more and more important to improve the developmental efficiency of heavy high-viscosity oil fields. There is a need for a deeper study of the properties of high-viscosity oil in order to improve enhanced oil recovery technologies.</p> <p><strong>Aim:</strong> The investigation of West Kazakhstan’s high-viscosity oils’ rheological properties by studying their physical and chemical characteristics and content of high-molecular compounds.</p> <p><strong>Materials and methods:</strong> As objects of the study, oils from Western Kazakhstan's Karazhanbas, Northern Buzachi and Zhalgyztobe oil fields were selected. To accomplish the given tasks, laboratory studies were conducted using contemporary methods of chemical and physicochemical analysis.</p> <p><strong>Results:</strong> This article presents the results of laboratory studies to determine the density, viscosity, and content of asphalt-resin-paraffin substances with a comparison of the results obtained. As well as the results of the study of the rheological characteristics of heavy high-viscosity oil with different water cut on the example of fields in Western Kazakhstan. The temperature limits and the influence of water cut on the manifestation of non-Newtonian properties were determined.</p> <p><strong>Conclusion:</strong> It was found that the rheological behavior of high-viscosity heavy oil with different water cut exhibits pronounced properties of pseudoplastic liquid, where the most pronounced non-Newtonian properties are manifested at the content of bound water exceeding 50%. The expression of non-Newtonian properties of West Kazakhstan oil is due to the increased content of high-molecular components. The obtained results are of practical interest in creating a composite model of hydrodynamic and technological system of collection and transportation of heavy, high-viscosity oil.</p>rheological studiesnon-Newtonian fluiddynamic viscosityshear gradientshear stresshigh-viscosity oilasphaltene-resin-paraffin substancesреологиялық зерттеулерньютонды емес сұйықтықдинамикалық тұтқырлықжылжу градиентіжылжу кернеуіжоғары тұтқырлы мұнайасфальтенді-шайырлы-парафинді заттарреологические исследованияненьютоновская жидкостьдинамическая вязкостьградиент сдвиганапряжение сдвигавысоковязкая нефтьасфальтосмолопарафиновые вещества1.Shaydakov VV, Golubev MV, Khaziyev NN, et al. Fiziko-khimicheskoye vozdeystviye na dobyvaemuyu produktsiyu neftyanykh skvazhin. Neftegazovoe delo. 2004;1:10–13. (In Russ).2.Nadirov NK. Vysokovyazkiye nefti i prirodnye bitumy (Istoriya. Basseyny. Svoystva). Almaty: Gylym; 2001. Iss.1. 256 p. (In Russ).3.Serkebayeva S.B. Issledovaniye reologicheskikh parametrov mangyshlakskoy nefti dlya truboprovodnoy transportirovki. Sbornik statey mezhdunarodnoy nauchnoy konferentsii «Nen'yutonovskie sistemy v neftegazovoy otrasli»; 2013; Baku. P. 229. (In Russ).4.Musabayev TT, Smagulov BA. Sostoyanie i perspektivy razvitiya mineral'no-syr'evoy bazy Respubliki Kazakhstan. Gornyy zhurnal Kazakhstana. 2014;1:11–15. (In Russ).5.Mamakhatov TM. Prognoz razvitiya netraditsionnykh istochnikov uglevodorodov v mirovoy energetike. Interekspo Geo-Sibir'. 2012;3:149–154. (In Russ).6.Espolov IT, Ayapbergenov EO, Serkebayeva BS. Features of rheological properties of high-viscosity oil at transportation on the pipeline. THNP. 2016;3:35–39.7.Sayenko OB, Posevich AG, Lozovaya SV, Babaev D. Osobennosti reologicheskikh svoystv vysokovyazkikh neftey. Sbornik trudov AO «NIPIneftegaz» «Problemy neftegazovoy otrasli Respubliki Kazakhstan i nauchnyy podkhod k ikh resheniyu». Aktau; 2015. Iss. 2. P. 153–159. (In Russ).8.Mullins OC. The asphaltenes. Annual Review of Analytical Chemistry. 2008;4:393–418. doi:10.1146/annurev-anchem-061010-113849.9.Lipayev AA. Razrabotka mestorozhdeniy tyazhyolykh neftey i prirodnykh bitumov. Izhevsk: Institute of Computer Science; 2013. 484 p. (In Russ).10.Shuhanova ZK, Oringoshen ES. Bituminous deposits in Kazakhstan. Vestnik KazNTU. 2014;1(101):7–9.11.Sayenko OB, Ryleyev AA, Lozovaya SV. Izucheniye svoystv neftey Mangistauskogo regiona i vybor variantov transportirovki. Sbornik trudov AO «NIPIneftegaz» «Aktual'nye voprosy neftegazovoy otrasli»; Aktau, 2016. Iss. 3. P. 117–126. (In Russ).