Қазақстанның мұнай-газ саласының хабаршысыҚазақстанның мұнай-газ саласының хабаршысы2707-42262957-806XKMG Engineering10846610.54859/kjogi108466Research ArticleThe results of single well chemical tracer tests to assess the effectiveness of surfactant-polymer exposure at the Kholmogorskoye fieldBondarM. Y.bondar.myu@gazprom-neft.ruOsipovA. V.osipov.ava@gazprom-neft.ruGromanA. A.groman.aa@gazprom-neft.ruKoltsovI. N.koltsov.in@gazprom-neft.ruScherbakovG. Y.shcherbakov.gyu@gazprom-neft.ruChebyshevaO. V.chebysheva.ov@gazprom-neft.ruGazpromneft-technological Partnerships LLC20072022421011110106202215072022Copyright © 2022, Bondar M.Y., Osipov A.V., Groman A.A., Koltsov I.N., Scherbakov G.Y., Chebysheva O.V.2022<p><em>Methods of enhanced oil recovery in general and surfactant-polymer flooding in particular are considered as tertiary methods for the development of mature oil fields in Western Siberia, with the potential to increase oil recovery to 60-70% of the initial geological reserves.</em></p> <p><em>To select an effective mixture of surfactants and polymer for surfactant–polymer flooding, laboratory tests were carried out in which the thermal stability, phase behaviour, interfacial tension and rheology of the formulations were tested. Filtration experiments were also carried out to optimize the volumes of injected fringes and the concentrations of reagents in them. At the final stage, single well chemical tracer tests (SWCTT) were carried out to assess the effectiveness of surfactant-polymer flooding on two wells of the Kholmogorskoye field. In order to investigate different technical and economic models of surfactant-polymer exposure, SWCTT tests were conducted with the same surfactant, but with a different design. The results of the SWCTT tests showed that the residual oil saturation in the affected area after injection of the surfactant-polymer solution decreased by about 11% compared to water flooding, which is about a third of the residual oil after flooding. The tested surfactant showed acceptable efficiency under suboptimal temperature conditions, which is favorable for the use of the selected surfactant-polymer composition for neighboring deposits and formations with different reservoir temperatures, but similar water composition.</em></p> <p><em>In general, the results of the conducted field tests correlate with the results of the main laboratory experiments for the selected surfactant.</em></p>surfactant-polymer floodingchemical enhanced oil recoveryresidual oil saturationSingle Well Chemical Tracer TestББЗ-полимерлік су басумұнай беруді ұлғайтудың химиялық әдістерімұнайдың қалдық қанығуыбірлік ұңғымалардағы трассерлік зерттеулерПАВ-полимерное заводнениехимические методы увеличения нефтеотдачиостаточная нефтенасыщенностьтрассерные исследования на единичных скважинах1.Volokitin Y., Shuster M., Karpan V., Koltsov I., Mikhaylenko E., Bondar M., Podberezhny M., Rakitin A., Batenburg D.W., Parker A.R., de Kruijf S., Southwick J.G., de Reus J., van Pol E., Heyden F.H., Boels L., Wever D.A., Brewer M. Results of Alkaline-Surfactant-Polymer Flooding Pilot at West Salym Field. – SPE-190382-MS, 2018.2.Produced for the first time in Russia, Gazprom Neft synthesises 11 cutting-edge enhanced oil recovery surfactant agents. – Материалы сайта https://ntc.gazprom-neft.com , ноябрь, 2017.3.Deans H.A. Using Chemical Tracers to Measure Fractional Flow and Saturation In-Situ. – SPE 7076, 1978.4.Deans H.A., Mut A.D. Chemical Tracer Studies To Determine water Saturation at Prudhoe Bay. – SPE 28591, 1997.5.Buijse M.A., Prelicz R.M., Barnes J.R., Cosmo C. Application of Internal Olefin Sulfonates and Other Surfactants to EOR. Part 2: The Design and Execution of an ASP Field Test. – SPE-129769, 2010.6.Deans H.A., Parks Y.J., Tezduyar T.E. Thermal Effects on Single Well Chemical Tracer Test for Measuring Residual Oil Saturation. – SPE Formation Evaluation, 1991, 6(3), р. 401-408. DOI:10.2118/19683-PA.7.Wolfenden R., Yuan Y. The “neutral” hydrolysis of simple carboxylic esters in water and the rate enhancements produced by acetylcholinesterase and other carboxylic acid esterases. – Journal of the American Chemical Society, 2011. 133(35), р. 13821-13823.8.Wellington S. and Richardson E. Redesigned ester single-well tracer test that incorporates ph driven hydrolysis rate changes. – SPE Reservoir Eng., 1994, p. 233-239.9.Jin L., Jamili A., and Harwell J.H., Shiau B.J., Roller C. Modelling and Interpretation of Single Well Chemical Tracer Test (SWCTT) for pre and post Chemical EOR in two High Salinity Reservoirs. – SPE-173618-MS, 2015.