Published August 2025, Pg. 50-56
Section: Сorrosion protection
UOT: 622.676.8
DOI: 10.37474/0365-8554/2025-08-50-56
Study of corrosion aggressiveness of formation waters to ensure corrosion protection of oil field equipment
K.A. Mamedov Cand. in Tech. Sc. - “Oil-Gas Scientific Research Project” InstituteThe article analyzes formation waters taken from wells with high water cut at the Guneshli field for corrosion activity. The main indicators in the analysis were the rate of metal corrosion, the presence of sulfate-reducing bacteria, the content of hydrogen sulfide, as well as chloride and sulfate ions in formation water. The studies showed that in 6 (14 %) wells out of the 44 studied flooded wells the formation waters were slightly corrosive, the average corrosion rate of metal samples in these formation waters was 0.05 mm/year, in 11 (25 %) wells with moderately corrosive formation waters the average corrosion rate of metal samples was 0.38 mm/year, and in 27 (61 %) wells with highly corrosive formation waters the average corrosion rate of metal samples was 0.6 mm/year. In 20 (50 %) flooded wells the hydrogen sulfide content averaged 23.56 mg/l, in 15 (37 %) – 65.89 mg/l, in 3 (8 %) – 124.67 mg/l. Two wells with a hydrogen sulfide content of 153–272 mg/l make up 5 % of the total number of wells studied. Hydrogen sulfide was not detected in the produced water of 4 wells.
The average value of the sum of sulfate and chloride ions in the formation water of 28 (65 %) production wells was 8.82–39.22 g/l, respectively. The average total value of sulfate and chloride ions in 15 wells (34 %) was 12.25 g/l, and in one well – 39.22 g/l. In addition, the study of the corrosive aggressiveness of formation water made it possible to compile aggressiveness maps for the Guneshli field.
Based on the research results, appropriate protective measures (physicochemical and biological methods) were developed to ensure reliable operation of oilfield equipment operating in an aggressive environment of formation waters.
References:
1. Mammadov K.A., Hamidova N.S., Huseynova U.K. Diagnosis of the corrosion state of hydraulic structures in the Caspian Sea in order to prevent environmental damage // Bulletinof national academy of sciences of the republic of Kazakhstan, 2020, v. 3, № 385, p. 111-118.
2. Veliyeva R.G., Gamidova N.S., Azimov N.A. Zashchita NKT ot mikrobiologicheskoy korrozii v skvazhinakh mestorozhdeniya Gyuneshli // Neftyanoye khozyaystvo, 2012, № 7, s. 113-114.
3. Mammadov K.S., Aliyev S., Nurullayev V. Application of new corrosion inhibitor for gathering pipelines for improving the ecological // News of The National Academy of Sciences of The Republic of Kazakhstan series chemistry and technology, 2021, v. 4, № 448, p. 32-39.
4. Huseynov H.Q. Guneshli yataghinda esasli temirde olan qezali quyularin tedqiqi ve onlarin berpasi // Azerbaijan neft teserrufati, 2011, № 8, s. 49-51.
5. Kamenshchikov F.A., Chernykh N.L. Bor’ba s sul’fatvosstanavlivayushchimi bakteriyami na neftyanykh mestorozhdeniyakh // Moskva-Izhevsk, 2007, s. 94.
6. Mammedov K.A., Hamidova N.S., Aliyev T.S. Development of a new multifunctional inhibitor for the protection of oilfield equipment // Chemical and Petroleum Engineering, 2019, 55 (3), pp. 340-346.
7. Alimbekova S.R. Fizicheskiye metody preduprezhdeniya soleotlozheniya pri neftedobyche / S.R. Alimbekova, A.I. Voloshin, R.N. Bakhtizin // Neftegazovoye delo, 2019, t. 17, № 6, s. 31-38.
8. Alimbekova S.R. Fizicheskiye metody preduprezhdeniya soleotlozheniya pri neftedobyche / S.R. Alimbekova, A.I. Voloshin, R.N. Bakhtizin // Neftegazovoye delo, 2019, t. 17, № 6, s. 31-37.
9. Mammadov K.A. Study of the effect of a new combined inhibitor and a permanent magnetic field on corrosion and salt deposition // News Of The National Academy Of Sciences Of The Republic Of Kazakhstan series chemistry and technology, 2020, v. 2, № 440, pp. 145-152.
10. Azimov N.A., Beliyeva R.G, Gamidova N.S. Issledovaniye novogo sul’fosoderzhashchego organicheskogo soyedineniya v kachestve bakteritsid-ingibitora dlya sistemy PPD // SOCAR Proceedings, 2011, № 3, s. 62-64.
11. Mammadov K.A., Hamidova N.S. Development of a multifunctional corrosion inhibitor, possessing the properties of a microemulsion // News of the national academy of sciences of the republic of Kazakhstan series of geology and technical sciences, 2020, v.1, № 439, pp. 64-72.
12. Mamedov K.A., Hamidova N.S. Prevention of corrosion destruction of oil field equipment by a composition based on technical phosphatides // SOCAR Proceedings, 2021, № 4, pp. 96-101.
13. Finsgar M., Jackson J. Application of corrosion inhibitors for steels in acidic media for the oil and gas industry: A review // Corrosion Science, 2014, v. 86, pp. 17-41.
14. Abbasov V.M., Duzdaban Kh.R., Mursalov N.I. [et al.]. Research imidazoline complex with different fatty acid in conservation liquids // The second European conference on chemical sciences, Vienna, 20 may, 2015, pp. 16-23.
15. Mamedov K.A., Gamidova N.S. Razrabotka ingibirovannoy smazochnoy kompozitsii dlya zashchity ot korrozii // Neftegazovoye delo, 2018, t. 16, № 3, s. 84-88.
