A significant residual oil reserves in Western Siberia are associated with the Neocomian deposits of the BS group. Their development is complicated by the sharply continental climate and rather high reservoir temperatures (about 90 °С), limiting the use of many non-thermostable reagents. The fields, as a rule, are equipped with a developed reservoir pressure maintenance system, located in places with a fairly developed infrastructure, with the presence of roads and pipelines, which makes such residual reserves promising. For additional washing of residual oil after flooding, a surfactant composition was developed. It includes a mixture of anionic and nonionic surfactants, the precursors of which are large-capacity products of basic organic and petrochemical synthesis available on the Russian market. These include: non-ionic surfactants (Neonol or nonylphenyl ether of polyethylene glycol) and surfactants represented by petroleum sulfonates (alpha-olefinsulfonate; sulfonated aromatic extract of selective oil purification; a mixture of sulfonated monoalkyl- and dialkylphenols, as well as alkyltoluene). The washing action of the surfactant composition described in the article is achieved due to the synergistic action of the mixture of surfactants and nonionic surfactants. As a result of the mixed micelles formation, the solubilization efficiency of both hydrocarbon and polar heteroatomic oil components increases; this allows increasing the oil recovery factor by reducing the residual oil content in the reservoir. The multi-component composition is injected into the wells of the reservoir pressure maintenance system and provides a significant increase in the efficiency of oil displacement, in relation to the basic waterflood. The rims of the surfactant and polyacrylamide composition with the addition of diethanolamine are sequentially injected into the well of the reservoir pressure maintenance system. This makes it possible to ensure maximum oil washing when the washing function of the surfactant composition is enhanced by the pushing rim of the polymer by increasing the capillary number, and diethanolamine, as an alkaline agent, desorbs the anionic components of the surfactant composition from the rock surface without causing precipitation of calcium carbonate.
References
1. Lozin E.V., Razrabotka unikal'nogo Arlanskogo neftyanogo mestorozhdeniya vostoka Russkoy plity (Developing a unique Arlan oil field of the East of the Russian Plate), Ufa: Skif Publ., 2012, 704 p.
2. Piyakov G.N., Usenko V.F., Kudashev R.I., Pavlov V.N., Study of the effectiveness of the use of an aqueous solution of surfactant OP-10 at the late stage of waterflooding (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1983, no. 11, pp. 43–46.
3. Khazipov R.Kh., Ganiev R.N., Ignat'eva V.E., Application of nonionic surfactants with the addition of an adsorption and biodegradation reducer to increase oil recovery (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1990, no. 12, pp. 46–49.
4. Fakhretdinov R.N., Fazlutdinov K.S., Nigmatullina R.F., Study of the possible destruction of nonionic surfactants in reservoir conditions (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1991, no. 5, pp. 27–29.
5. Fakhretdinov R.N., Fazlutdinov K.S., Nigmatullina R.F., Tolstikov G.A. et al., On the chemical stability of nonionic surfactants in reservoir conditions during oil displacement (In Russ.), DAN SSSR, 1988, V. 301, no. 2, pp. 355–358.
6. Babitskaya K.I, Gorodnov V.P., Tsar'kov I.V., Obobshchennyy analiz rezul'tatov opytno-promyslovykh ispytaniy metodom mitsellyarno-polimernogo zavodneniya (Generalized analysis of the results of field testing by micellar-polymer flooding), Proceedings of XI International Scientific and Practical Conference "Ashirovskie chteniya" (Ashirov Readings), Samara, SamSTU, 2014, pp. 217–226.
7. Kislyakov Yu.P., The use of surfactants at the Uzen field (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1983, no. 7, pp. 37–39.
8. Patent US1651311A, Recovery of petroleum from oil bearing sands, Inventor: Atkinson H., 1927.
9. Pletnev M.Yu., On the nature of interaction in solution of mixtures of nonionic and anionic surfactants (In Russ.), Kolloidnyy zhurnal, 1987, V. 49, no. 1, pp. 184–187.
10. Chang H.L. et al., Advances in polymer flooding and alkaline/surfactant/polymer processes as developed and applied in the People's Republic of China, SPE-89175-JPT, 2006, DOI:10.2118/89175-JPT
11. Sheng J.J., Leonhardt B., Azri N., Status of polymer-flooding technology, Journal of Canadian petroleum technology, 2015, V. 54 (2), pp. 116–126, DOI:10.2118/174541-PA
12. Sheng J.J., A comprehensive review of alkaline-surfactant-polymer (ASP) flooding, Asia-Pacific Journal of Chemical Engineering, 2014, no. 9 (4), pp. 471–489, DOI:10.1002/APJ.1824
13. Liu S., Feng Li, Miller R. et al., Alkaline/surfactant/polymer processes: Wide range of conditions for good recovery, SPE-113936-PA, 2010, DOI: 10.2118/113936-PA
14. Buijse M.A., Prelicz R.M., Barnes J.R. et al., Application of internal olefin sulfonates and other surfactants to EOR. Part 2: The design and execution of an ASP field test, SPE-129769-MS, 2010, DOI:10.2118/129769-MS
15. Nikitina A.A., Salym Petroleum: ASP technology as a solution to the problem of depletion of traditional reserves (In Russ.), Neftegazovaya vertikal', 2014, no. 10, pp. 24–26.
16. Barnes J.R., Dirkzwager H., Smit J.R. et al., Application of internal olefin sulfonates and other surfactants to EOR. Part 1: Structure-performance relationships for selection at different reservoir conditions, SPE-129766-MS, 2010, DOI:10.2118/129766-MS
17. Al-Murayri M.T., Kamal D.S., Al-Qattan A. et al., A practical and economically feasible surfactant EOR strategy: Impact of injection water ions on surfactant utilization, Journal of Petroleum Science and Engineering, 2021, V. 108479, pp. 1–14, DOI:10.2118/198002-ms
18. Zhao P. et al., Development of high performance surfactants for difficult oils, SPE-113432-MS, 2008, DOI:10.2118/113432-MS
19. Puerto M., Hirasaki G.J., Miller C.A., Surfactant systems for EOR in High-temperature, high-salinity environments, SPE-129675-PA, 2010, DOI:10.2118/129675-PA
20. Van der Heyden F. et al., Injectivity experiences and its surveillance in the West Salym ASP pilot, Presented at the 19th European Symposium on Improved Oil Recovery, 2017, DOI: 10.3997/2214-4609.201700243
21. Healy R.N., Reed R.L., Stenmark D.K., Multiphase microemulsion systems, SPE-5565-PA, 1976, DOI:10.2118/5565-PA
22. Khisamutdinov N.I., Khasanov M.M., Telin A.G. et al., Razrabotka neftyanykh mestorozhdeniy (Development of oil fields), Part 1. Razrabotka neftyanykh mestorozhdeniy na pozdney stadii (Development of oil fields at a late stage): edited by Khisamutdinov N.I., Ibragimov G.Z., Moscow: Publ. of VNIIOENG, 1994, pp. 216–218.
23. Musin R.M., Eliseev A.N., Kirillov A.S. et al., Adaptation of micellar-polymer flooding technology to DKT formation conditions of the Yuzhno-Kubansky uplift of the Vakhitovskoe field of PJSC "Orenburgneft" (In Russ.), Neftepromyslovoe delo, 2018, no. 2, pp. 21–25.
24. Patent RU 2612773 C1, Compound for enhanced oil recovery, Inventors: Konovalov V.V., Gorodnov V.P., Babitskaya K.I., Zhidkova M.V., Sklyuev P.V.
25. Thomas A., Essentials of polymer flooding technique, John Wiley and Sons Ltd., 2019, 328 p.
26. Southwick J., Brewer M., van Batenburg D. et al., Ethanolamine as alkali for alkali surfactant polymer flooding, SPE-200432-MS, 2020, DOI: https://doi.org/10.2118/200432-MS
