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Study of optical properties of oil of Vishnevo-Polyanskoe deposit

UDK: 665.61.035.7
DOI: 10.24887/0028-2448-2018-6-117-120
Key words: refractive-densimetric studies, Vishnevo-Polyanskoye deposit, high viscosity oil, refraction index, specific refraction, refraction intercept, identification card, spectrophotometry
Authors: B.G. Ganiev (Tatneft PJSC, RF, Almetyevsk), I.A. Guskova (Almetyevsk State Oil Institute, RF, Almetyevsk), R.Z. Nurgaliev (Almetyevsk State Oil Institute, RF, Almetyevsk), A.T. Gabdrakhmanov (Almetyevsk State Oil Institute, RF, Almetyevsk)

Oil change can be significant in a number of parameters: density, viscosity, fractional composition, saturation pressure, gas factor, sulfur content, tar, asphaltenes and paraffin during development. However, changing the values of these parameters is often within the limits of measurement errors, and the laboratory determination of most of them is very laborious. Optical characteristics, as the most sensitive, fairly quickly and accurately determined integral parameters of oil can serve as a tool for assess the effectiveness of the technologies being developed. The results of a complex of optical studies using spectrophotometry and refractive-densimetry are presented in the article. In field practice, spectrophotometers have been widely used to solve a wide range of tasks. In this paper, for the analysis of optical properties, the values of the coefficient of light absorption at the appropriate wavelengths, characterizing the total content of chromophore compounds, vanadium porphyrins, and the content of vanadium porphyrins – vanadium etioporphyrins in oil were used, spectral coefficients correlated with the oil type in density and with the content of aromatic compounds. To identify chemical compounds, quantitative and structural analysis, and to determine the physicochemical parameters of substances, a refractive - densimetric method was also used. In the article, on the basis of the refractive index, the conversion factors were used, with the help of which the identification refractive- densimetric maps were constructed, which made it possible to visualize the grouping of samples of high-viscosity oil produced by composition. The results of the studies are important and are the basis for assessing the effectiveness of the application of oil recovery technologies at the Vishnevo-Polyanskoye high-viscosity oil field. The experiments are aimed at assessing the completeness of the production of reserves at various parameters of the impact on the reservoir system for working out the optimal technology.

References

1. Altunina L.K., Kuvshinov V.A., Kuvshinov I.V., Nizkotemperaturnye fiziko-khimicheskie tekhnologii uvelicheniya nefteotdachi zalezhey vysokovyazkikh neftey (Low-temperature physico-chemical technologies for enhanced oil recovery of high-viscosity oil deposits), Collected papers “Osobennosti razvedki i razrabotki mestorozhdeniy netraditsionnykh uglevodorodov” (Features of exploration and development of deposits of non-traditional hydrocarbons), Kazan’: Ikhlas Publ., 2015, pp. 26 - 29.

2. Kokorev V.I., Darishchev V.I., Akhmadeyshin I.A. et al., Field test results and prospects of thermal gas treatment technologies for the Bazhenov formation development in RITEK OJSC (In Russ.), Burenie i neft', 2014, no. 11, pp. 26–28.

3. Bokserman A.A., Vlasov V.N., Plynin V.V. et al., Initial appreciation of water-air ratio influence on efficiency of Bazhenov series development by thermal-gas method (In Russ.), Neftepromyslovoe delo, 2011, no. 2, pp. 12–15.

4. Muslimov R.Kh., Abdulmazitov R.G., Khisamov R.B. et al., Neftegazonosnost' Respubliki Tatarstan. Geologiya i razrabotka neftyanykh mestorozhdeniy (Oil and gas bearing of the Republic of Tatarstan. Geology and development of oil fields), Part 2, Kazan': FEN Publ., 2007, 524 p.

5. Gus'kova I.A., Gabdrakhmanov A.T., Assessment of EOR methods' effect on oil properties (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2011, no. 4, pp. 101–103.

6. Safieva R.Z., Khimiya nefti i gaza. Neftyanye dispersnye sistemy: sostav i svoystva (Chemistry of oil and gas. Oil dispersed systems: composition and properties), Part 1, Moscow: Publ. of Gubkin Russian State University of Oil and Gas, 2004, 112 p.

7. Akhmetov B.R., Evdokimov I.N., Eliseev D.Yu., Eliseev N.Yu., Vliyanie nadmolekulyarnykh struktur asfal'tenov romashkinskoy nefti na nadezhnost' opticheskikh metodov kontrolya (Influence of supramolecular structures of asphaltenes of Romashkinskoye field’s oil on reliability of optical control methods), Collected papers “Bol'shaya neft': realii, problemy, perspektivy” (Big oil: realities, problems, prospects), Proceedings of All-Russian Scientific and Technical Conference, Part 2, Al'met'evsk:В  Publ. ofВ  Almetyevsk State Petroleum Institute, 2001, pp. 360–363.

8. Akhmetov B.R., Evdokimov I.N., Eliseev D.Yu., Features of optical absorption spectra of oil and petroleum asphaltenes (In Russ.), Nauka i tekhnologiya uglevodorodov, 2002, no. 3, pp. 25–30.

9. Evdokimov I.N., Losev A.P., Vozmozhnosti metodov issledovaniy v sistemakh kontrolya razrabotki neftyanykh mestorozhdeniy (Possibilities of research methods in oilfield development control systems), Moscow: Neft’ I Gas Publ., 2007, 228 p.

10. Nikolaev V.F. et al., Visualization of the group composition of light oil products and liquid products of organic synthesis (In Russ.), Vestnik tekhnologicheskogo universiteta, 2015, V. 22, pp. 43–46.

11. Bogomolov A.I., Temyanko M.B., Khatyntseva L.I., Sovremennye metody issledovaniya neftey (Modern methods of oil analysis), Leningrad: Nedra Publ., 1984, 430 p.

Oil change can be significant in a number of parameters: density, viscosity, fractional composition, saturation pressure, gas factor, sulfur content, tar, asphaltenes and paraffin during development. However, changing the values of these parameters is often within the limits of measurement errors, and the laboratory determination of most of them is very laborious. Optical characteristics, as the most sensitive, fairly quickly and accurately determined integral parameters of oil can serve as a tool for assess the effectiveness of the technologies being developed. The results of a complex of optical studies using spectrophotometry and refractive-densimetry are presented in the article. In field practice, spectrophotometers have been widely used to solve a wide range of tasks. In this paper, for the analysis of optical properties, the values of the coefficient of light absorption at the appropriate wavelengths, characterizing the total content of chromophore compounds, vanadium porphyrins, and the content of vanadium porphyrins – vanadium etioporphyrins in oil were used, spectral coefficients correlated with the oil type in density and with the content of aromatic compounds. To identify chemical compounds, quantitative and structural analysis, and to determine the physicochemical parameters of substances, a refractive - densimetric method was also used. In the article, on the basis of the refractive index, the conversion factors were used, with the help of which the identification refractive- densimetric maps were constructed, which made it possible to visualize the grouping of samples of high-viscosity oil produced by composition. The results of the studies are important and are the basis for assessing the effectiveness of the application of oil recovery technologies at the Vishnevo-Polyanskoye high-viscosity oil field. The experiments are aimed at assessing the completeness of the production of reserves at various parameters of the impact on the reservoir system for working out the optimal technology.

References

1. Altunina L.K., Kuvshinov V.A., Kuvshinov I.V., Nizkotemperaturnye fiziko-khimicheskie tekhnologii uvelicheniya nefteotdachi zalezhey vysokovyazkikh neftey (Low-temperature physico-chemical technologies for enhanced oil recovery of high-viscosity oil deposits), Collected papers “Osobennosti razvedki i razrabotki mestorozhdeniy netraditsionnykh uglevodorodov” (Features of exploration and development of deposits of non-traditional hydrocarbons), Kazan’: Ikhlas Publ., 2015, pp. 26 - 29.

2. Kokorev V.I., Darishchev V.I., Akhmadeyshin I.A. et al., Field test results and prospects of thermal gas treatment technologies for the Bazhenov formation development in RITEK OJSC (In Russ.), Burenie i neft', 2014, no. 11, pp. 26–28.

3. Bokserman A.A., Vlasov V.N., Plynin V.V. et al., Initial appreciation of water-air ratio influence on efficiency of Bazhenov series development by thermal-gas method (In Russ.), Neftepromyslovoe delo, 2011, no. 2, pp. 12–15.

4. Muslimov R.Kh., Abdulmazitov R.G., Khisamov R.B. et al., Neftegazonosnost' Respubliki Tatarstan. Geologiya i razrabotka neftyanykh mestorozhdeniy (Oil and gas bearing of the Republic of Tatarstan. Geology and development of oil fields), Part 2, Kazan': FEN Publ., 2007, 524 p.

5. Gus'kova I.A., Gabdrakhmanov A.T., Assessment of EOR methods' effect on oil properties (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2011, no. 4, pp. 101–103.

6. Safieva R.Z., Khimiya nefti i gaza. Neftyanye dispersnye sistemy: sostav i svoystva (Chemistry of oil and gas. Oil dispersed systems: composition and properties), Part 1, Moscow: Publ. of Gubkin Russian State University of Oil and Gas, 2004, 112 p.

7. Akhmetov B.R., Evdokimov I.N., Eliseev D.Yu., Eliseev N.Yu., Vliyanie nadmolekulyarnykh struktur asfal'tenov romashkinskoy nefti na nadezhnost' opticheskikh metodov kontrolya (Influence of supramolecular structures of asphaltenes of Romashkinskoye field’s oil on reliability of optical control methods), Collected papers “Bol'shaya neft': realii, problemy, perspektivy” (Big oil: realities, problems, prospects), Proceedings of All-Russian Scientific and Technical Conference, Part 2, Al'met'evsk:В  Publ. ofВ  Almetyevsk State Petroleum Institute, 2001, pp. 360–363.

8. Akhmetov B.R., Evdokimov I.N., Eliseev D.Yu., Features of optical absorption spectra of oil and petroleum asphaltenes (In Russ.), Nauka i tekhnologiya uglevodorodov, 2002, no. 3, pp. 25–30.

9. Evdokimov I.N., Losev A.P., Vozmozhnosti metodov issledovaniy v sistemakh kontrolya razrabotki neftyanykh mestorozhdeniy (Possibilities of research methods in oilfield development control systems), Moscow: Neft’ I Gas Publ., 2007, 228 p.

10. Nikolaev V.F. et al., Visualization of the group composition of light oil products and liquid products of organic synthesis (In Russ.), Vestnik tekhnologicheskogo universiteta, 2015, V. 22, pp. 43–46.

11. Bogomolov A.I., Temyanko M.B., Khatyntseva L.I., Sovremennye metody issledovaniya neftey (Modern methods of oil analysis), Leningrad: Nedra Publ., 1984, 430 p.


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