Akbota Adilbekova graduated from Al-Farabi Kazakh National University in 1995. She received degree in 2001 in Chemical Sciences. She is an Associate Professor at the Analytical, Colloid Chemistry and Technology Rare Elements. She has published more than 35 papers in different journals and conference proceedings.
Demulsification is one of the important stages in the petroleum processing. The breaking of crude oil emulsions (demulsification) is necessary to avoid problems during the transportation and processing of oil. The presence of water in crude oil is undesirable and can result in pipeline corrosion and increase the cost of transportation because of chloride salt content in aqueous phase of emulsion. Therefore, preparation of oil for processing includes primarily dehydration and desalting of oil. The aim of the present work is to study the physicochemical properties of crude oil of the Kazakhstan fields (Zhanaozen and North-West Konys) which are known by high ability to form stable oil emulsion. Qualitative and quantitative composition of main stabilizing components of oil emulsions (resins, asphaltenes and high molecular paraffins) was determined. It was found that samples relate to fine dispersed oil emulsions by dispersion and to less stable (Konys) and more stable (Zhanaozen) oil emulsions by ability to form an emulsion. Light oil of Konys oilfield contains 11.5% of paraffins, 0.69% resins and 0.19% asphaltenes. The same measurements were carried out for heavy oil of Zhanaozen where paraffin content exceeds 30%, resins equal to 1.5% and asphaltenes – 0.6%. In this work, thermochemical dewatering of crude oil samples using non-ionic surfactants was carried out. The results reported, contribute to a better understanding of the water/oil demulsification mechanism and selection of effective chemical agents.
E A Predtechenskaya defended her PhD thesis in 1984 and DSc thesis in 2011. She is a leading Scientist of the SNIIGGiMS JSC in Lithology and Petroleum Geology, the Head of the Postgraduate Studentship department, a member of two Dissertation Counsils in the Institute of Oil and Gas Geology and Geophisics of the Siberian Branch of the Russian Academy of Sciences, an expert of the Russian Foundation of the Basic Research. She has published about 90 scientific papers in the fields of lithology, mineralogy, oil and gas geology, including a monograph and an inventor’s certificate.
The Bazhenovo formation which contains about 15% of hydrocarbon (HC) resources of West Siberia is of a great interest as a target of HC accumulations in reservoirs of unconventional type. The bituminous Bazhenovo Formation belong among domanikoid formations and are characterized by abnormal reservoir pressures, higher temperatures, low viscosity and density of HC mixtures at their high gas saturation. The formation contains swelling clay minerals of hydromica-montmorillonite composition, interlayers of radiolarian silicites and pelecypodian shelly deposits of porous loose structure. This fact favors petroleum HC sorption and their concentration as local accumulations inside the oil-source strata. Interlayers of secondary altered radiolarites and pelecypodian shelly deposits in well logs show features typical of fine-grained sandstones and siltstones. Enhanced fracturing and ability to brecctiation of rocks confined to zones of deep faults with events of dynamic fluid migration benefit anomalous processes of kaolinitization, partial carbonatization and silicification of rocks with the formation of secondary porosity and reservoirs of improved quality. Hydrothermal processes are often connected with a neotectonic stage of tectonic activization and caused by vertical migration of deep fluids. Siliceous (radiolarites), carbonate (shelly) and microlaminated silica-clay rocks of the Bazhenovo Formation undergone hydrothermal changes can serve as reservoirs accepting allochthonous hydrocarbons in addition to autochthonic ones. When the pressure forced by deep fluids exceeds the reservoir pressure in «oil-source» strata, there occurs a fluid fracturing, HCs migrate up the section and accumulate in overlying porous reservoirs. From this standpoint the Bazhenovo Formation may be thought of as an intermediate hydrocarbon reservoir.