At present for determination of rheological properties of compositions used in oil and gas production processes, rotational viscometers with different measuring systems are used: coaxial cylinders, cone-plate, plate-plate. However, an important task is to investigate and comprehensively assess not only the viscous but also the elastic properties of the compositions. To estimate both viscous and elastic properties of the analyzed system, a dynamic (oscillation) measurement mode is used. The paper presents an analysis of oscillation studies of process fluids for hydraulic fracturing and conformance control operations. Approaches for analyzing amplitude and frequency dependences of elasticity and viscosity moduli are applied to viscoelastic surfactants with and without additives, to linear and cross-linked water-soluble polymers, and to a sediment-gel-forming composition. The possibilities of using such parameters were evaluated, which can be determined by oscillation testing, as relaxation time and complex viscosity for comparing the properties of compositions for hydraulic fracturing and conformance control operations. The values of effective viscosity obtained by the methods of classical rheology and oscillation test values on a Grace M5600 rheometer were analyzed in this work. It is shown that when studying the rheological properties of the most common structured systems used in oil and gas production, it is impossible to get a complete picture of the system properties using rotational viscometry alone. It is not possible to assess the efficiency of a composition by viscosity value alone. Therefore, an urgent issue is the inclusion of oscillation testing in the analysis of technological properties in the selection of compositions used in oil and gas production.
References
1. Silin M., Magadova L., Malkin D. et al., Applicability assessment of viscoelastic surfactants and synthetic polymers as a base of hydraulic fracturing fluids, Energies, 2022, V. 15, no. 8, DOI: http://doi.org/10.3390/en15082827
2. Silin M.A., Magadova L.A., Malkin D.N. et al., Development of viscoelastic composition based on surfactants for hydraulic fracturing (In Russ.), Trudy Rossiyskogo gosudarstvennogo universiteta nefti i gaza (NIU) imeni I.M. Gubkina, 2020, no. 1(298), pp. 142–154, DOI: https://doi.org/10.33285/2073-9028-2020-1(298)-142-154
3. Idrisov A.R., Kuryashov D.A., Bashkirtseva N.Yu. et al., Rheological properties of mixed micellar solutions of zwitterionic and cationic surfactants (In Russ.), Vestnik Kazanskogo tekhnologicheskogo universiteta, 2009, no. 4, pp. 260–267.
4. Telin A.G., Zaynetdinov T.I., Khlebnikova M.E., Study of the rheological properties of water-swellable polyacrylamide FS 305 for the development of technologies for water shut-off works at oil wells (In Russ.), Proceedings of Mavlyutov Institute of Mechanics, 2006, no. 4, pp. 207–223.
5. Akhmetov A.T., Fakhreeva A.V., Lenchenkova L.E., Telin A.G., Osobennosti reologii vodoizolyatsionnykh reagentov na osnove polimerdispersnykh organomineral’nykh materialov (Features of the rheology of waterproofing reagents based on polymer-dispersed organomineral materials), Proceedings of 30th Symposium on Rheology, Moscow: Publ. of TIPS RAS, 2021, pp. 33–35.
6. Kirsanov E.A., Matveenko V.N., Vyazkost’ i uprugost’ strukturirovannykh zhidkostey (Viscosity and elasticity of structured liquids), Moscow: Tekhnosfera Publ., 2022, 284 p.
7. Feng Y., Chu Z., Dreiss C.A., Smart wormlike micelles: Design, characteristics and applications, Springer, 2015, 91 p., DOI: http://doi.org/10.1007/978-3-662-45950-8
8. Agrawal N.R., Yue Xiu, Raghavan S.R., The unusual rheology of wormlike micelles in glycerol: Comparable timescales for chain reptation and segmental relaxation, Langmuir, 2020, V. 36(23), pp. 6370–6377, DOI: http://doi.org/10.1021/acs.langmuir.0c00489
9. Mezger T.G., Applied rheology – With Joe Flow on Rheology Road, Austria. Anton Paar, 2015, 191 p.
10. Krisanova P.K., Filatov A.A., Poteshkina K.A., Issledovanie reologicheskikh svoystv rastvorov vyazkouprugikh poverkhnostno-aktivnykh veshchestv ostsillyatsionnym metodom (Study of the rheological properties of solutions of viscoelastic surfactants using the oscillatory method), Proceedings of XXIV International Scientific and Practical Conference of Students and Young Scientists “Khimiya i khimicheskaya tekhnologiya v XXI veke” (Chemistry and chemical technology in the 21st century) named after outstanding chemists Kulev L.P. and Kizhner N.M., dedicated to the 85th anniversary of the birth of Professor Kravtsov A.V., Part 1, Tomsk: Publ. of TPU, 2023, pp. 271–272.
11. Gol’berg I.I., Mekhanicheskoe povedenie polimernykh materialov (matematicheskoe opisanie) (Mechanical behavior of polymer materials (mathematical description)), Moscow: Khimiya Publ., 1970, 192 p.
12. Magadova L.A., Poteshkina K.A., Davletshina L.F., Karzhavina K.V., Specificity of rheological studies of aqueous solutions of polyacrylamide using rotational viscometers (In Russ.), Trudy Rossiyskogo gosudarstvennogo universiteta nefti i gaza (NIU) imeni I.M. Gubkina, 2021, no. 3(304), pp. 115–128, DOI: https://doi.org/10.33285/2073-9028-2021-3(304)-115-128
13. Molchanov V.S., Filippova O.E., Effects of concentration and temperature on viscoelastic properties of aqueous potassium oleate solutions (In Russ.), Kolloidnyy zhurnal, 2009, V. 71, no. 2, pp. 249–255.
14. Silin M.A., Magadova L.A., Malkin D.N. et al., Methods for evaluating the technological properties of water-based fracturing fluids (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2022, no. 7, pp. 97–101, DOI: https://doi.org/10.24887/0028-2448-2022-7-97-101
15. Poteshkina K.A., Razrabotka i issledovanie osadkogeleobrazuyushchego sostava dlya povysheniya nefteotdachi plastov (Development and research of sediment-gel-forming composition for enhanced oil recovery): thesis of candidate of technical science, Moscow, 2016.
