RESEARCH OF PHYSICAL AND CHEMICAL FEATURES OF HIGH VISCOUS OILS TO INCREASE OF OIL DISPLACEMENT

Abstract

Based on the results of theoretical and experimental studies were identified indicators of density, depth of occurrence and sulfur content of Kazakh oils. A search for effective ways of generating hard-to-recover fields, which are unique by its area, the capacity of productive stratum, reserves density, the behaviour of saturating fluids and etc. The physical and chemical natures of oils, of formation water and oil-water system from the Kumsay and Kokzhide fields were investigated. It has been established that oils of researched fields are highly viscous, paraffinic and contain a significant amount of surfactants such as tars, asphaltenes and aromatic hydrocarbon compounds which have an influence on formation interfacial oil layer's composition and the patterns of distribution in the pore space. High viscosity as a factor of flow affects the oil's mobility and the possibility of pumping in fluids, so oil recovery from such fields is difficult, production becomes more complicated. The analysis of oil to determine the amount of water in its composition by the Dean-Stark method and mineralogical analysis of formation water were carried out. The high water content with the dissolved chloride salts as a disperse phase also strengthens the resistance of displacement and phase distribution of liquids.

References

[1] Ruzin L.M. Metody povysheniya nefteotdachi plastov. Uhta: UGTU, 2014. 127 p.
[2] Bajkov N.M. Zarubezhnyj opyt vnedreniya metodov uvelicheniya nefteotdachi // Neftyanoe hozyajstvo. 2006. N 7. P. 120-122.
[3] Kumar R., Jha R., Rojas D., Lolley C. Integrated Primary and Thermal Development of a Large Extraheavy-Oil Field // SPE reservoir evaluation & engineering. 2017. 20(4). P. 924-936. DOI:10.2118/180732-PA.
[4] Khaledialidusti R., Kleppe J., Enayatpour S. Evaluation of surfactant flooding using interwell tracer analysis // Journal of petroleum exploration and production technology. 2017. 7(3). P. 853-872. DOI:10.1007/s13202-016-0288-9.
[5] Memon M.K., Elraies K.A., Al-Mossawy M.I. Impact of new foam surfactant blend with water alternating gas injection on residual oil recovery // Journal of petroleum exploration and production technology. 2017. 7(3). P. 843-851. DOI:10.1007/s13202-016-0303-1.
[6] Manrique E., Ahmadi M., Samani S. Historical and recent observations in polymer floods: an update review // Journal of oil, gas and alternative energy sources. 2017. Vol. 6, N 5. P. 17-48.
[7] Bashkirceva N.Yu. Rol' uvelicheniya nefteotdachi v vosproizvodstve syr'evoj bazy // Vestn. Kazansk. tekhn. un-ta. Ekonomika i ekonom. nauki. 2014. N 19. P. 309-311.
[8] Manzhaj V.N., Polikarpov A.V., Rozhdestvenskij E.A. Primenenie nefterastvorimyh polimerov dlya povysheniya nefteotdachi plastov // Izv. Tomsk. politekhn. un-ta. Inzhiniring georesursov. 2017. Vol. 328, N 12. P. 29-35.
[9] Bajdel'dina O.Zh., Daribaeva N.G., Nuranbaeva B.M. Osobennosti stroeniya i svojstv parafinistyh neftej Kazahstana, vliyayushchie na effektivnost' meropriyatij pri bor'be s parafinootlozheniyami // Sovr. naukoemk. tekhn. 2015. N 4. P. 100-106.
[10] Olajire, Abass A. Review of ASP EOR (alkaline surfactant polymer enhanced oil recovery) technology in the petroleum industry: Prospects and challenges // Energy. 2014. Vol. 77. P. 963-982. DOI 10.1016/j.energy.2014.09.005.
[11] Raffa P., Broekhuis A.A., Picchioni F. Polymeric surfactants for enhanced oil recovery: A review // Journal of Petroleum Science and Engineering. 2016. 145. P. 723-733. DOI:10.1016/j.petrol.2016.07.007.
[12] Aliabadian E., Sadeghi S., Kamkar M., Chen Z., Sundararar Rheology of fumed silica nanoparticles/partially hydrolyzed polyacrylamide aqueous solutions under small and large amplitude oscillatory shear deformations // Journal of rheology. 2018. 62(5). P. 1197-1216. DOI:10.1122/1.5024384.
[13] Bashkirceva N.Yu. Vysokovyazkie nefti i prirodnye nefti // Vestn. Kazansk. tekhn. un-ta. 2013. P. 296-299.