ANALYSIS OF RESEARCH RESULTS OF CORE SAMPLES AND CORE OIL USING STATISTICAL METHODS
The aim of the work is to assess the potential of oil and bitumen productivity of the analyzed deposits. Research was conducted on 13 core samples from various intervals of 4 wells. This paper presents the results of an analysis of the composition and properties of hydrocarbons extracted from the core of carbonate and adjoining deposits from an interval of 1631.2-1774.8 m. The analysis is based on the results of thermogravimetric, chromatographic and optical studies. The results were processed using the calculation of linear and rank correlation. A significant relationship is noted between the values of the parameters obtained as a result of chromatographic studies and laboratory studies to determine the composition of oil and the processes that occur in them when heated according to a given program, as well as between the results of chromatographic and optical studies. The analysis showed a significant contribution of light fractions of isoalkanes and light fractions of normal alkanes during thermal transformations, i.e. during storage, delivery to the laboratory and sample preparation, there was no significant loss of light components of the core material hydrocarbons. No correlation was found between optical and thermal methods, since these methods are aimed at identifying various stocks of organic material, which also require the application of various methods of exposure in their development. A detailed analysis of the samples revealing a noticeable mass loss during thermal exposure and low values of the light absorption coefficient makes it possible to identify rock samples with organic matter that is not converted to bitumoids. The results obtained make it possible to assess the applicability of both research methods and development systems with various technologies for influencing the bottom-hole zone and inter-well volume of the formation.
thermogravimetry, spectrophotometry, chromatography, core, core oil, shale, dolomite, mudstone, limestone, rank correlation, linear correlation, Cheddock scale
A.V. Nasybullin, L.I. Garipova Metodika opredeleniya sostava uglevodorodov i processov protekayushchih v nih pri nagrevanii po zadannoj programme [Technique for determination of hydrocarbon assay and processes occurring in hydrocarbons at elevated temperatures]. Almetyevsk, 2018, 15 p (in Russian)
RF Patent No. 2568450 C1, 20.11.2015.
I.A. Guskova, A.T. Gabdrakhmanov, A.A. Rybakov Sposob razrabotki neftyanogo mestorozhdeniya [Oil recovery method]. RF Patent No. 2568450 C1, 2015. Appl. No.2014117999/03 dated 05.05.2014. (in Russian)
A.T. Gabdrakhmanov, I.A. Guskova Optical methods for assessing recovered oil properties change caused by injection of multipurpose complex agent. 11th International Multidisciplinary Scientific Geoconference and EXPO: Modern Management of Mine Producing, Geology and Environmental Protection, SGEM 2011. Albena, 2011. pp. 1259-1264.
A.T. Gabdrakhmanov Analiz izmeneniya svojstv nefti i poputnoj vody pri razrabotke mestorozhdeniya s primeneniem zavodneniya v sochetanii s MUN [Analyzing change of oil and produced water properties during waterflooding combined with enhanced oil recovery methods]. Research report No. 0002/55/43 dated 01.01.2014 (PJSC TATNEFT), 2013,148 p. (in Russian)
A.T. Gabdrakhmanov Sozdanie metodov kompleksnogo kontrolya za vyrabotkoj zapasov nefti na pozdnej stadii razrabotki mestorozhdeniya v usloviyah integrirovannogo primeneniya tekhnologij [Development of integrated oil reserve recovery monitoring techniques for mature fields under combined application of technologies]. Research report No.6-15/G dated 04.02.2015 (Almetyevsk State Petroleum Institute). 2014, 64 p. (in Russian)
A.T. Gabdrakhmanov Izuchenie izmeneniya opticheskih harakteristik uglevodorodov dlya ocenki vozmozhnosti podpitki uglevodorodami iz glubin Zeml [Studying changes of hydrocarbon optical properties to assess potential recharging with abyssal hydrocarbons]. Proceedings of International research-to-practice conference: Hydrocarbon and mineral resources potential of crystal basement. Kazan, 2019, pp. 168-171 (in Russian)
R.S. Khisamov, I.A. Guskova, A.T. Gabdrakhmanov, V.A. Sayakhov, E.S. Okhotnikova Sravnitel'nyj analiz neodnorodnosti sostava i svojstv sverhvyazkoj nefti Ashal'chinskogo mestorozhdeniya na osnove eksperimental'nyh issledovanij [Comparative study of different compositions and properties of heavy oil from the Ashalchinskoye field based on experimental research]. Neftyanoye Khozyaistvo, 2019, No.10, pp.48-52 (in Russian)
A.T. Gabdrakhmanov Kontrol' processov vozdejstviya na plasty na osnove metoda kompleksnogo analiza spektrov vidimogo opticheskogo pogloshcheniya nefti [Monitoring formation stimulation processes by integrated analysis of oil apparent optical absorption spectra]. Abstract of a thesis. Bugulma, 2011, 25 p (in Russian)
A.T. Gabdrakhmanov, Ph.D., Associate Professor, State educational institution of higher professional education «Almetyevsk State Oil Institute»
2, Lenin st., Almetyevsk, 423450, Russian Federation
A.T. Gabdrakhmanov Analiz rezul'tatov issledovanij obrazcov kerna i kernovoj nefti s primeneniem statisticheskih metodov [Analysis of research results of core samples and core oil using statistical methods]. Neftyanaya Provintsiya, No. 2(22), 2020. pp.18-35. DOI https://doi.org/10.25689/NP.2020.2.18-35 (in Russian)