The effects of mineral salts on the rheology of polymer solutions in case of Santa Cruze reservoir (Cuba)

UDK: 622.276:661.185.1.004.14
DOI: 10.24887/0028-2448-2021-1-48-51
Key words: polymer, polyacrylamide, characteristic viscosity, equilibrium water absorption, rheology, salinity
Authors: I.I. Mukhamatdinov (Kazan (Volga region) Federal University, RF, Kazan), A. Sosa Acosta (Kazan (Volga region) Federal University, RF, Kazan), F.A. Aliev (Kazan (Volga region) Federal University, RF, Kazan), A.A. Akhmadiyarov (Kazan (Volga region) Federal University, RF, Kazan), S.A. Dolgih (Kazan (Volga region) Federal University, RF, Kazan)

This study investigates the polymer solutions used in water shut-off control of production wells and polymer flooding of Santa Cruze reservoir located in Republic of Cuba. The reservoir is characterized by early water breakthrough and therefore application of chemical reagents is required to decrease the content of produced water and gases from production wells. The aim of this study was to reveal the influence of mineral salts on the rheology of polymer solutions based on two different industrial trademarks: Seurvey R1 and Softpusher. The hydrochemical composition and physical properties of formation water samples from Santa Cruze reservoir revealed domination of sodium and potassium cations and chloride anion. The water hardness (8.3 mg-eq./L) was calculated basing on the content of calcium and magnesium cations. It was revealed that Suervey R1 has a higher viscosity, which is in consistent with its molecular mass. In general, investigation of polymer solutions, which were prepared with distilled water, shows better rheological performance than solutions based on formation water samples. This is due to sensitivity of polyacrylamide (PAA) to the ion forces of solvents. The swelling degree is maximum in case of distilled water and sharply decreases with addition of salt content. The Softpusher polyacrylamide solutions were more salt-tolerated than Seurvey R1 polyacrylamide solutions, as Softpusher PAA has less branched structures in contrast with high-molecular and more branched Seurvey R1 polymer. Increasing viscosity of dispersion medium inhibits the precipitation rate of dispersed particles. Thus, the rheology and sedimentation stability of dispersion are improved due to polyacrylamide flocculation.

References

1. Radchenko S.S., Novakov I.A., Radchenko P.S. et al., Interaction of aluminoxane particles with weakly charged cationic polyelectrolytes, Journal of Applied Polymer Science, 2011, V. 121, no. 1, pp. 475–482.

2. Lake L.W., Enhanced oil recovery, Prentice Hall, Cop., 1989, 550 p.

3. Fan V.A., Razrabotka sostava dlya tekhnologii PAV-polimernogo zavodneniya primenitel'no k usloviyam nizhnego miotsena mestorozhdeniya Belyy Tigr (Development of a composition for surfactant-polymer flooding technology applied to the conditions of the Lower Miocene of the White Tiger field): thesis of candidate of technical science, Moscow, 2017. 

4. Idahosa P.E.G., Oluyemi G.F., Oyeneyin M.B., Prabhu R., Rate-dependent polymer adsorption in porous media, Journal of Petroleum Science and Engineering, 2016, V. 143, pp. 65–71.

5. Al-Hashmi A.R., Luckham P.F., Grattoni C.A., Flow-induced-microgel adsorption of high-molecular weight polyacrylamides, Journal of Petroleum Science and Engineering, 2013, V. 112, pp. 1–6.

6. Ruzin L.M., Morozyuk L.M., Metody povysheniya nefteotdachi plastov (teoriya i praktika) (EOR methods (theory and practice)), Ukhta: Publ. of USTU, 2014, 127 p.

7. Mukhamatdinov I.I., Aliev F.A., Sitnov S.A. et al., Study of rheological behavior of systems ‘polymer solution – rocks’ (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 11, pp. 121–123.

8. Sosa Akosta A., Mukhamatdinov I.I., Solodov V.A., Vakhin A.V., Investigation of physicochemical properties of polyacrylamidesmers (In Russ.), Vestnik Kazanskogo tekhnologicheskogo universiteta, 2018, V. 21, no. 8, pp. 52–56.

9. Mukhamatdinov I.I., Aliev F.A., Sosa Acosta A., Vakhin A.V., A new approach for measuring rheology of polymer solutions in reservoir conditions, Journal of Petroleum Science and Engineering, 2019, V. 181, pp. 106–160.

10. Mukhamatdinov I.I., Sosa Akosta A., Vakhin A.V., Solodov V.A., The influence of pressure on the interfacial tension of polyacrylamides (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 6, pp. 90–92.

11. Aquilanti V., Cappelletti D., Pirani F., Range and strength of interatomic forces: dispersion and induction contributions to the bonds of dications and of ionic molecules, Chemical Physics, 1996, V. 209, pp. 299–311.

12. Kavalerskaya N.E., Ferapontov N.B., The behavior of cross-linked polyacrylamide in solutions of low molecular weight electrolytes (In Russ.), Sorbtsionnye i khromatograficheskie protsessy, 2009, V. 9, no. 3, pp. 433–440.

13. 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, pp. 207–223.

This study investigates the polymer solutions used in water shut-off control of production wells and polymer flooding of Santa Cruze reservoir located in Republic of Cuba. The reservoir is characterized by early water breakthrough and therefore application of chemical reagents is required to decrease the content of produced water and gases from production wells. The aim of this study was to reveal the influence of mineral salts on the rheology of polymer solutions based on two different industrial trademarks: Seurvey R1 and Softpusher. The hydrochemical composition and physical properties of formation water samples from Santa Cruze reservoir revealed domination of sodium and potassium cations and chloride anion. The water hardness (8.3 mg-eq./L) was calculated basing on the content of calcium and magnesium cations. It was revealed that Suervey R1 has a higher viscosity, which is in consistent with its molecular mass. In general, investigation of polymer solutions, which were prepared with distilled water, shows better rheological performance than solutions based on formation water samples. This is due to sensitivity of polyacrylamide (PAA) to the ion forces of solvents. The swelling degree is maximum in case of distilled water and sharply decreases with addition of salt content. The Softpusher polyacrylamide solutions were more salt-tolerated than Seurvey R1 polyacrylamide solutions, as Softpusher PAA has less branched structures in contrast with high-molecular and more branched Seurvey R1 polymer. Increasing viscosity of dispersion medium inhibits the precipitation rate of dispersed particles. Thus, the rheology and sedimentation stability of dispersion are improved due to polyacrylamide flocculation.

References

1. Radchenko S.S., Novakov I.A., Radchenko P.S. et al., Interaction of aluminoxane particles with weakly charged cationic polyelectrolytes, Journal of Applied Polymer Science, 2011, V. 121, no. 1, pp. 475–482.

2. Lake L.W., Enhanced oil recovery, Prentice Hall, Cop., 1989, 550 p.

3. Fan V.A., Razrabotka sostava dlya tekhnologii PAV-polimernogo zavodneniya primenitel'no k usloviyam nizhnego miotsena mestorozhdeniya Belyy Tigr (Development of a composition for surfactant-polymer flooding technology applied to the conditions of the Lower Miocene of the White Tiger field): thesis of candidate of technical science, Moscow, 2017. 

4. Idahosa P.E.G., Oluyemi G.F., Oyeneyin M.B., Prabhu R., Rate-dependent polymer adsorption in porous media, Journal of Petroleum Science and Engineering, 2016, V. 143, pp. 65–71.

5. Al-Hashmi A.R., Luckham P.F., Grattoni C.A., Flow-induced-microgel adsorption of high-molecular weight polyacrylamides, Journal of Petroleum Science and Engineering, 2013, V. 112, pp. 1–6.

6. Ruzin L.M., Morozyuk L.M., Metody povysheniya nefteotdachi plastov (teoriya i praktika) (EOR methods (theory and practice)), Ukhta: Publ. of USTU, 2014, 127 p.

7. Mukhamatdinov I.I., Aliev F.A., Sitnov S.A. et al., Study of rheological behavior of systems ‘polymer solution – rocks’ (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 11, pp. 121–123.

8. Sosa Akosta A., Mukhamatdinov I.I., Solodov V.A., Vakhin A.V., Investigation of physicochemical properties of polyacrylamidesmers (In Russ.), Vestnik Kazanskogo tekhnologicheskogo universiteta, 2018, V. 21, no. 8, pp. 52–56.

9. Mukhamatdinov I.I., Aliev F.A., Sosa Acosta A., Vakhin A.V., A new approach for measuring rheology of polymer solutions in reservoir conditions, Journal of Petroleum Science and Engineering, 2019, V. 181, pp. 106–160.

10. Mukhamatdinov I.I., Sosa Akosta A., Vakhin A.V., Solodov V.A., The influence of pressure on the interfacial tension of polyacrylamides (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 6, pp. 90–92.

11. Aquilanti V., Cappelletti D., Pirani F., Range and strength of interatomic forces: dispersion and induction contributions to the bonds of dications and of ionic molecules, Chemical Physics, 1996, V. 209, pp. 299–311.

12. Kavalerskaya N.E., Ferapontov N.B., The behavior of cross-linked polyacrylamide in solutions of low molecular weight electrolytes (In Russ.), Sorbtsionnye i khromatograficheskie protsessy, 2009, V. 9, no. 3, pp. 433–440.

13. 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, pp. 207–223.


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