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
High molecular weight amphoteric terpolymer based on a nonionic monomer, acrylamide (AAm), an anionic monomer, 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt (AMPS), and a cationic monomer, (3-acrylamidopropyl) trimethylammonium chloride (APTAC), was prepared using free-radical copolymerization in an aqueous solution and characterized by 1H NMR, FTIR, GPC, DLS, zeta potential and viscometry. The polymer was shown to be viscosifying, and therefore can be utilized as a polymer flooding agent in the high salinity and temperature conditions of oil reservoirs. Injection of 0.25 wt.% of amphoteric terpolymer, dissolved in 200-300 g∙L-1 brine, into high and low permeability sand pack models demonstrated that the oil recovery factor (ORF) increases by up to 23-28% in comparison with saline water flooding. This is explained by an increase in the viscosity of brine solution due to disruption of intra- and interionic contacts between oppositely charged AMPS and APTAC moieties, demonstrating the antipolyelectrolyte effect. In high saline water, the anions and cations of salts screen the electrostatic attraction between positively and negatively charged macroions, resulting in expansion of the macromolecule. This phenomenon leads to an increase in the viscosifying effect on the brine solution, thus decreasing the mobility factor (M), which is defined as the ratio of displacing phase mobility (water) to displaced phase mobility (oil).
2 Sydansk RD, Romero-Zeron L (2011) Reservoir conformance improvement. SPE, Richardson, United States. ISBN: 978-1-55563-302-8
3 Wang D, Hao Y, Delamaide E, Ye Zh, Ha S, Xiangcheng J (1993) Results of two polymer flooding pilots in the central area of Daqing oil field. Proceedings of SPE Annual Technical Conference and Exhibition, Houston, Texas, United States. P.299.
4 Zhao Y, Yin Sh, Seright RS, Ning S, Zhang Y, Bai B (2021) SPE J 26:1535-1551. Crossref
5 Abhijit S, Achinta B, Keka O, Ajay M (2010) Journal of Chemical Engineering 55(10):4315-4322. Crossref
6 Bruno MO, Silveira LF, Rosângela BZ (2016) International Journal of Engineering and Technology 16(03):1-8.
7 Mungan N (1972) SPE J 12:469-473. Crossref
8 Moradi-Araghi A, Peter HD (1987) SPE Reservoir Eng 2:189-198. Crossref
9 Kudaibergenov S (2002) Polyampholytes: synthesis, characterization and application. Kluwer Academic/Plenum Publishers, United States. ISBN 978-1-4615-0627-0
10 Kudaibergenov S (2021) Polyampholytes: past, present, perspectives. Almaty, Kazakhstan.
11 Kudaibergenov S, Okay O (2020) Polym Advan Technol 32(7):2639-2654. Crossref
12 Mukhametgazy N, Gussenov I, Shakhvorostov A, Kudaibergenov S (2020) Bulletin of Karaganda University. Chemistry Series 4(100):119-127. Crossref
13 Fu X, Yang Q, Zhang Y (2020) J Therm Anal Calorim 146:1371-1381. Crossref
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