Kazakhstan journal for oil & gas industryKazakhstan journal for oil & gas industry2707-42262957-806XKMG Engineering10862210.54859/kjogi108622Research ArticleSynthetic polyampholytes based on acrylamide derivatives – new polymer for enhanced oil recoveryGussenovIskander Sh.iskander.gusenov@mail.ruhttps://orcid.org/0000-0002-9820-7952ShakhvorostovAlexey V.Alex.hv91@gmail.comhttps://orcid.org/0000-0003-3502-6123MukhametgazyNurbatyrNurbatyr.kaz@gmail.comKudaibergenovSarkyt E.<p>Professor, D.Sc.</p>Skudai@mail.ruInstitute of Polymer Materials and Technologies21012023441041160610202206122022Copyright © 2023, Gussenov I.S., Shakhvorostov A.V., Mukhametgazy N., Kudaibergenov S.E.2023<p><strong>Background:</strong> Due to its high efficiency, polymer flooding has been widely used in the fields of Kazakhstan. However, under conditions of high water salinity, high concentrations of polymers are needed to ensure the design viscosity of the solutions, therefore, polymers are needed that, at concentrations not exceeding 0.10.2%, will increase the viscosity of water up to 2050 cP when the formation water salinity is above 200 g/ l.</p> <p><strong>Aim:</strong> The purpose of this work is to study the salt- and heat-resistant properties of a linear polyampholyte based on acrylamide, an anionic monomer sodium salt of 2-acrylamido-2-methyl-1-propanesulfonic acid - and a cationic monomer (3-acrylamidopropyl) trimethylammonium chloride and substantiate its applicability in oil production.</p> <p><strong>Materials and methods:</strong> We used water with a salinity of 200300 g/l, as well as oils with viscosities of 60, 138, and 420 cP. To simulate a porous medium, bulk sand models and aerated concrete with high porosity were chosen. Hydrolyzed polyacrylamide with a molecular weight of 17 million Da and a ternary polyampholyte with a molecular weight of 2.9 million Da were used as polymers. To compare the effectiveness of these polymers under conditions of high salinity, experiments were carried out to measure the dynamic viscosity and oil displacement efficiency.</p> <p><strong>Results:</strong> It is shown that the injection of a 0.25% solution of triple polyampholyte dissolved in water with a salinity of 200 g/l into sand models increases the oil displacement efficiency by 2328% compared to the injection of formation water. Under identical conditions, the injection of a hydrolyzed polyacrylamide solution resulted in an increase in the oil displacement efficiency by only 18%.</p> <p><strong>Conclusion:</strong> Triple polyampholyte based on acrylamide derivatives has superior oil displacement properties compared to hydrolyzed polyacrylamide in high salinity reservoirs. The results of laboratory experiments can draw the attention of oil and gas industry specialists and subsoil users to new developments by the staff of the Institute of Polymer Materials and Technologies in terms of scaling up synthetic polyampholytes and conducting pilot tests.</p>ternary polyampholytesacrylamide derivativessalt and heat resistanceviscositybulk modeloil displacement efficiencyүштік полиамфолиттеракриламид туындыларытұзға және температураға төзімділіктұтқырлыққұм моделімұнайдың ығысу тиімділігітройные полиамфолитыпроизводные акриламида, соле- и термостойкостьвязкостьпесчаная моделькоэффициент вытеснения нефти1.Kudaibergenov SE. Polyampholytes: Synthesis, Characterization and Application. NY: Kluwer Academic/Plenum Publishers, 2002; 220 p.2.Lowe AB, McCormick CL. Synthesis and solution properties of zwitterionic polymers. Chem. Rev. 2002;102 (11):4177–4190. doi:10.1021/cr020371t.3.Kudaibergenov SE. Recent advances in studying of synthetic polyampholytes in solutions. Adv Polym Sci. 1999;144:115–197.4.Kudaibergenov SE. Polyampholytes. In Encyclopedia of Polymer Science and Technology. John Wiley Interscience (NY): Hoboken, 2008; 1–30.5.Kudaibergenov SE. Polyampholytes: Past, Present, Perspectives. Almaty, 2021; 222 p.6.Kudaibergenov S, Jaeger W, Laschewsky A. Polymeric betaines: Synthesis, characterization and application. Adv Polym Sci. 2006;201:157–224.7.Laschewsky A. Structures and synthesis of zwitterionic polymers. Polymers. 2014;6(5):1544–1601. doi:10.3390/polym6051544.8.Singh Paresh K, Singh Vinay K, Singh M. Zwitterionic polyelectrolytes: A Review. e-Polymers. 2007;7. doi:10.1515/epoly.2007.7.1.335.9.He XY, Zhou WR, Xu XJ, Yang W. Preparation and application of zwitterionic polymers. Progress in Chemistry. 2013;25(6):1023–1030.10.Candau F, Joanny J.F. Polyampholytes (Properties in aqueous solution). In: J. C. Salamone, editor. Polymeric Materials Encyclopedia. New York: CRC Press Boca Raton; 1996. P:5476–5488.11.Ohno H, Yoshizawa-Fujita M, Ogihara W. In: H. Ohno, editor. Electrochemical Aspects of Ionic Liquids. New Jersey: John Wiley & Sons, Inc., 2011. P:433–439.12.Fouillet CCJ, Greaves TL, Quinn JF, et al. Copolyampholytes produced from RAFT polymerization of protic ionic liquids. Macromolecules. 2017;50:8965.13.Kudaibergenov SE. Application of polyampholytes in emerging technologies. Materials Today: Proceedings. 2022. doi:10.1016/j.matpr.2022.07.187.14.Ezell RG, McCormick ChL. Electrolyte- and pH-responsive polyampholytes with potential as viscosity-control agents in enhanced petroleum recovery. J Appl Polym Sci. 2007; 104:2812-2821.15.Rabiee A, Ershad-Langroudi A, Jamshidi, H. Polyacrylamide-Based Polyampholytes and Their Applications. Rev. Chem. Eng. 2014;30:501–519. doi:10.1515/revce-2014-0004.16.El-hoshoudy AN, Desouky SEM, Elkady MY, et al. Investigation of optimum polymerization conditions for synthesis of cross-linked polyacrylamide-amphoteric surfer nanocomposites for polymer flooding in sandstone reservoirs. Int. J. Polym. Sci. 2015;1–14. doi:10.1155/2015/318708.17.Chen Z. Polyacrylamide and its derivatives for oil recovery [dissertation]. Doctoral Dissertations; 2016.18.Sherwood NS, Costello CA, Matz GF. Use of polyampholytes to enhance oil and/or gas recovery. United States patent US 4 484 631. 1982.19.Chung HC, Hu YT, Tonmukayakul N, Fitzpatrick H. Ampholyte polymers and methods of treating subterranean formations with the same. United States patent WO 2015/138018 A1. 2015 Sept 17.20.Патент РК № 14007 от 27.05.2002. Кудайбергенов С.Е., Кожабеков Д.Б., Гекелер К.Е. Водорастворимые и водонабухающие полиамфолиты и методы их получения // Kudaibergenov SE, Kozhabekov DB, Gekeler KE. Vodorastvorimye i vodonabukhayushchiye polyamfolity I metody ikh polucheniya. Kazakhstan patent 14007. 2002 May 05. (In russ).21.Mukhametgazy N, Gussenov IS, Shakhvorostov AV, Kudaibergenov SE. Salt tolerant acrylamide-based quenched polyampholytes for polymer flooding. Bull. Karaganda Univ. Chem. Ser. 2020;100:119–127. doi:10.31489/2020Ch4/119-127.22.Gussenov I, Mukhametgazy N, Shakhvorostov A, Kudaibergenov S. Synthesis and characterization of high molecular weight amphoteric terpolymer based on acrylamide, 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt and (3-acrylamidopropyl)trimethylammonium chloride for oil recovery. Chem. Bull. Kazakh Natl. Univ. 2021;103:12–20. doi:10.15328/cb1243.23.Wever DAZ, Picchion F, Broekhuis AA. Polymers for enhanced oil recovery: A paradigm for structure–property relationship in aqueous solution. Progress in Polymer Science. 2011;36:1558–1628. doi:10.1016/j.progpolymsci.2011.05.006.