Kazakhstan journal for oil & gas industryKazakhstan journal for oil & gas industry2707-42262957-806XKMG Engineering9971210.54859/kjogi99712Research ArticleFingerprinting and biomarker analysis of oil from Akshabulak group for determining oil typesSeitkhaziyevY. Sh.seitkhaziyev.y@llpcmg.kzUteyevR. N.uteyev.r@llpcmg.kzMustafaevM. K.mmustafaev@kgm.kzLiuSh.shlui@kgm.kzSәrsenbekovN. D.sarsenbekov.n@llpcmg.kzDosmukhambetovA. K.dosmukhambetov.a@llpcmg.kzAtyrau Branch of KMG ENGINEERING LLP«JV Kazgermunai» LLP1512202134911082801202228012022Copyright © 2021, Seitkhaziyev Y.S., Uteyev R.N., Mustafaev M.K., Liu S., Sarsenbekov N.D., Dosmukhambetov A.K.2021<p>This article presents the results of fingerprinting of 128 oil samples derived from all production wells of three Akshabulak group fields to determine the types of oils. Based on the results of this analysis, four groups of oils were identified: The first group includes oils (red) of the lower hydrocarbon pay zones (III-IV-V) in Akshabulak Central, the upper zones of the I southern dome of Akshabulak Central and all pay zones of the northern dome at Akshabulak South. The second group of oils (green) was identified in the wells exploiting pay zone I in the northern dome of Akshabulak Central, while oils (blue) in the productive horizons of Akshabulak East and paleochannel sediments of Akshabulak Central form the third group. The fourth group includes one oil sample with different genesis from well № 37, which penetrates paleo-channel № 13 at South Akshabulak.</p> <p>Biomarker analysis was carried out for 39 oil samples, according to which the oils were formed in terrigenous (clayey) organic matter, deposited in lacustrine environment. In terms of thermal parameters, the oils of the Eastern Akshabulak are less mature than the oils of the Central Akshabulak and the South Akshabulak, despite their relative deeper depths. Based on the work performed, the conclusion presents the prospective hydrocarbon accumulation zones suitable for increasing hydrocarbon resources and reserves in the future. However it should be noted that the results of the studies performed provide valuable information only when integrated with the corresponding geological and seismic data.</p>biomarkersoil fingerprintingsteranediasteraneoil source rockthermal maturitycorrelationбиомаркерлермұнай фингерпринтингістерандардиастеранмұнай көздерітермикалық жетілукорреляциябиомаркерыфингерпринтинг нефтистераныдиастеранынефтематеринская породатермическая зрелостькорреляция1.Айдарбеков К.Д. История открытия и освоения месторождения Кумколь. – Нефть и газ, 2020, №3–4, (117–118), с. 180–186. // Aydarbekov K.D. Istoriya otkrytiya i osvoeniya mestorozhdeniya Kumkol' [History of discovery and development of the Kumkol field]. – Neft' i gaz [Oil and Gas], 2020, №3–4, (117–118), pp. 180–186.2.Сейтхазиев Е.Ш., Байбурина Г. 2015 Отчет по теме: «Геохимические исследования проб нефти на месторождении Акшабулак Восточный, Акшабулак Центральный и Нуралы», Атырау, архив Атырауского филиала ТОО «КМГ Инжиниринг». // Seytkhaziev E.SH., Bayburina G. 2015 Otchet po teme: «Geokhimicheskie issledovaniya prob nefti na mestorozhdenii Akshabulak Vostochnyi, Akshabulak Tsentral'nyy i Nuraly» [Report on the topic: “Geochemical studies of oil samples at the East Akshabulak, Central Akshabulak and Nuraly fields”], Atyrau, Arkhiv Atyrauskogo filiala TOO «KMG Inzhiniring» [Archive, Atyrau branch of KMG Engineering LLP].3.Сейтхазиев Е.Ш., Джумабаев Т., Досмухамбетов А.К., 2021. Отчет по теме: «Геохимические исследования проб нефти месторождений Акшабулак Южный, Акшабулак Центральный и Акшабулак Восточный», Атырау, архив Атырауского филиала ТОО «КМГ Инжиниринг». // Seytkhaziev E.SH., Dzhumabaev T., Dosmukhambetov A.K., 2021 Otchet po teme: «Geokhimicheskie issledovaniya prob nefti mestorozhdeniy Akshabulak YUzhnyy, Akshabulak TSentral'nyy i Akshabulak Vostochnyy» [Report on the topic: “Geochemical studies of oil samples from the South Akshabulak, Central Akshabulak and East Akshabulak fields”], Atyrau, arkhiv Atyrauskogo filiala TOO «KMG Inzhiniring» [Archive, Atyrau branch of KMG Engineering LLP].