Study of the cement stone corrosion in the wells of the Azerbaijan fields

UDK: 622.245.422
DOI: 10.24887/0028-2448-2021-9-42-45
Key words: hydrogen sulfide, formation water, cement stone, bottomhole zone, isolation of water inflows, thermodynamic equilibrium, convection
Authors: F.F. Akhmad (Azerbaijan State Oil and Industry University, the Republic of Azerbaijan, Baku), S.H. Novruzova (Azerbaijan State Oil and Industry University, the Republic of Azerbaijan, Baku), Y.Y. Shmoncheva (Azerbaijan State Oil and Industry University, the Republic of Azerbaijan, Baku), I.N. Aliyev (Azerbaijan State Oil and Industry University, the Republic of Azerbaijan, Baku)

The oil fields of Azerbaijan are mainly composed of poorly cemented and loose rocks. Most of these fields have already entered the final stage of development, characterized by a high water cut. At this stage of development, the problems associated with sand and water production of wells are exacerbated. In addition, though that relict (primary) hydrogen sulphide is not present in the composition of reservoir oil in Azerbaijan's fields, biogenic hydrogen sulphide (hydrogen sulphide of secondary origin) is observed in the production of many producing wells. It is also possible to contaminate a productive formation as a result of the gradual decomposition of a number of reagents (polymers and lignosulfonates) contained in process fluids (drilling fluids, killing fluids, etc.) by sulfate-reducing bacteria. As a result, in the process of oil production, serious complications arise associated with the high corrosiveness and toxicity of hydrogen sulfide. In this regard, there is a need for a more thorough study of hydrogen sulfide and identifying the degree of its destructive effect in the process of oil production. The greatest danger from the whole variety of corrosive formation fluids is hydrogen sulfide and carbon dioxide. They cause intense corrosion damage to both downhole equipment and plugging stone, which is a barrier against sand and formation water. As a result of studies of the interaction of cement stone with hydrogen sulfide dissolved in formation water, it was found that during thermodynamic processes, the cements used do not provide a stable cement stone. The buffer layer inside the cement stone has a higher permeability and to a lesser extent prevents the transfer of aggressive substances into the depth of the cement stone and calcium hydrosulfate into the near-wellbore zone, which leads to intensive destruction of the stone. It is noted the need to continue the study of physicochemical factors affecting the rate of corrosion of cement stone in order to establish a quantitative relationship between the factors and determine methods for increasing the corrosion resistance of stone.

References

1. Feyzullaev A.A.O., About depth of diagenetic processes and lower boundary of biosphere in the South Caspian basin (In Russ.), Geofizicheskie protsessy i biosfera, 2020, V. 19, no. 2, pp. 57–73.

2. Agzamov F.A., Lomakina L.N., Khababutdinova N.B. et al., Cement stone corrosion processes affected by acidulous components of bedded fluids (In Russ.), Neftegazovoe delo, 2015, V. 13, no. 4, pp. 10–28.

3. Agzamov F.A., Makhmutov A.N., Tokunova E.F. et al., Study of corrosion stability of a cement stone in magnesia aggressive environment (In Russ.), Georesursy = Georesources, 2019, V. 21, no. 3, pp. 73–78.

4. Voronik A.M., Kamenskikh S.V., Sharov E.V., Research of corrosion resistance of a cement stone in the conditions of hydrogen sulfide aggression (In Russ.), Stroitel'stvo neftyanykh i gazovykh skvazhin na sushe i na more, 2017, no. 2, pp. 38–43.

5. Kamenskikh S.V., Lanina T.D., Sharov E.V., The analysis of grouting cements researches for conditions of hydrosulfuric aggression (In Russ.), Stroitel'stvo neftyanykh i gazovykh skvazhin na sushe i na more, 2016, no. 3, pp. 39–43.

6. Voronik A.M., Kamenskikh S.V., Ulyasheva N.M., Attachment of highly permeable rocks, containing aggressive fluids (In Russ.), Bulatovskie chteniya, 2020, V. 3, pp. 51–55.

7. Sozonov A.S., Sukhachev V.Y., Olennikova O.V. et al., First implementation of self-healing cement systems in H2S/CO2 aggressive environment across pay-zone (In Russ.), SPE-201842-MS, 2020, https://doi.org/10.2118/201842-MS.

8. Wentworth Ch.C., Kramer J.F., A new high performance biguanide polyammonium - Based blend for control of microbiological fouling in oil and gas stimulation, Paper presented at the CORROSION, April 2021.

9. Kamenskih S., Ulyasheva N., Buslaev G. et al., Research and development of the lightweight corrosion-resistant cement blend for well cementing in complex geological conditions (In Russ.), SPE-191509-18RPTC-MS, 2018, https://doi.org/10.2118/191509-18RPTC-MS

10. Jafariesfad N., Sangesland S., Gawel K., Torsæter M., New materials and technologies for life-lasting cement sheath: A review of recent advances, SPE-199885-PA, 2020, https://doi.org/10.2118/199885-PA.

11. Jafariesfad N., Gong Y., Geiker M.R., Skalle P., Nano-sized MgO with engineered expansive property for oil well cement systems, SPE-180038-MS, 2016, DOI: https://doi.org/10.2118/180038-MS

12. Utkin D.A., Garshina O.V., Kudimov I.A., Okromelidze G.V., The cement slurry and technology of the cementing for environments abnormally high content of hydrogen sulfide, SPE-201840-MS, 2020, DOI: https://doi.org/10.2118/201840-MS 

The oil fields of Azerbaijan are mainly composed of poorly cemented and loose rocks. Most of these fields have already entered the final stage of development, characterized by a high water cut. At this stage of development, the problems associated with sand and water production of wells are exacerbated. In addition, though that relict (primary) hydrogen sulphide is not present in the composition of reservoir oil in Azerbaijan's fields, biogenic hydrogen sulphide (hydrogen sulphide of secondary origin) is observed in the production of many producing wells. It is also possible to contaminate a productive formation as a result of the gradual decomposition of a number of reagents (polymers and lignosulfonates) contained in process fluids (drilling fluids, killing fluids, etc.) by sulfate-reducing bacteria. As a result, in the process of oil production, serious complications arise associated with the high corrosiveness and toxicity of hydrogen sulfide. In this regard, there is a need for a more thorough study of hydrogen sulfide and identifying the degree of its destructive effect in the process of oil production. The greatest danger from the whole variety of corrosive formation fluids is hydrogen sulfide and carbon dioxide. They cause intense corrosion damage to both downhole equipment and plugging stone, which is a barrier against sand and formation water. As a result of studies of the interaction of cement stone with hydrogen sulfide dissolved in formation water, it was found that during thermodynamic processes, the cements used do not provide a stable cement stone. The buffer layer inside the cement stone has a higher permeability and to a lesser extent prevents the transfer of aggressive substances into the depth of the cement stone and calcium hydrosulfate into the near-wellbore zone, which leads to intensive destruction of the stone. It is noted the need to continue the study of physicochemical factors affecting the rate of corrosion of cement stone in order to establish a quantitative relationship between the factors and determine methods for increasing the corrosion resistance of stone.

References

1. Feyzullaev A.A.O., About depth of diagenetic processes and lower boundary of biosphere in the South Caspian basin (In Russ.), Geofizicheskie protsessy i biosfera, 2020, V. 19, no. 2, pp. 57–73.

2. Agzamov F.A., Lomakina L.N., Khababutdinova N.B. et al., Cement stone corrosion processes affected by acidulous components of bedded fluids (In Russ.), Neftegazovoe delo, 2015, V. 13, no. 4, pp. 10–28.

3. Agzamov F.A., Makhmutov A.N., Tokunova E.F. et al., Study of corrosion stability of a cement stone in magnesia aggressive environment (In Russ.), Georesursy = Georesources, 2019, V. 21, no. 3, pp. 73–78.

4. Voronik A.M., Kamenskikh S.V., Sharov E.V., Research of corrosion resistance of a cement stone in the conditions of hydrogen sulfide aggression (In Russ.), Stroitel'stvo neftyanykh i gazovykh skvazhin na sushe i na more, 2017, no. 2, pp. 38–43.

5. Kamenskikh S.V., Lanina T.D., Sharov E.V., The analysis of grouting cements researches for conditions of hydrosulfuric aggression (In Russ.), Stroitel'stvo neftyanykh i gazovykh skvazhin na sushe i na more, 2016, no. 3, pp. 39–43.

6. Voronik A.M., Kamenskikh S.V., Ulyasheva N.M., Attachment of highly permeable rocks, containing aggressive fluids (In Russ.), Bulatovskie chteniya, 2020, V. 3, pp. 51–55.

7. Sozonov A.S., Sukhachev V.Y., Olennikova O.V. et al., First implementation of self-healing cement systems in H2S/CO2 aggressive environment across pay-zone (In Russ.), SPE-201842-MS, 2020, https://doi.org/10.2118/201842-MS.

8. Wentworth Ch.C., Kramer J.F., A new high performance biguanide polyammonium - Based blend for control of microbiological fouling in oil and gas stimulation, Paper presented at the CORROSION, April 2021.

9. Kamenskih S., Ulyasheva N., Buslaev G. et al., Research and development of the lightweight corrosion-resistant cement blend for well cementing in complex geological conditions (In Russ.), SPE-191509-18RPTC-MS, 2018, https://doi.org/10.2118/191509-18RPTC-MS

10. Jafariesfad N., Sangesland S., Gawel K., Torsæter M., New materials and technologies for life-lasting cement sheath: A review of recent advances, SPE-199885-PA, 2020, https://doi.org/10.2118/199885-PA.

11. Jafariesfad N., Gong Y., Geiker M.R., Skalle P., Nano-sized MgO with engineered expansive property for oil well cement systems, SPE-180038-MS, 2016, DOI: https://doi.org/10.2118/180038-MS

12. Utkin D.A., Garshina O.V., Kudimov I.A., Okromelidze G.V., The cement slurry and technology of the cementing for environments abnormally high content of hydrogen sulfide, SPE-201840-MS, 2020, DOI: https://doi.org/10.2118/201840-MS 


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