Published September 2026, Pg. 84-93

Section: Young scientists and specialists

UOT: 622. 276.5:550.064.45

DOI: 10.37474/0365-8554/2026-09-84-93

Study of the impact of heavy components in the process of gas-condensate field exploitation, taking into account reservoir conditions

H.F. Abbaszade - “Oil-Gas Scientific Research Project” Institute

This paper investigates the influence of interactions between gas and liquid components, as well as the effect of the in-situ condition, on phase behavior in gas-condensate systems, with particular emphasis on retrograde condensation processes. The study is based on experimental analyses carried out under various reservoir model conditions, evaluating the physical and thermodynamic changes occurring during differential condensation and their impact on reservoir performance.
The results demonstrate that the porous medium significantly affects the differential condensation process. At the initial pressure stage, the condensate factor decreases by up to 45 % in a dry quartz sand model and by 47 % in a water-saturated medium compared to an empty cell. In addition, it was revealed that the heavy component-C10 precipitates at higher pressures in the porous medium, while its produced amount decreases by 13–19 %, indicating an increase in the proportion of heavy components remaining in the reservoir during depletion and their notable impact on production performance.
Material balance calculations show that the density of the condensate remaining in the reservoir increases almost linearly with pressure decline starting from the onset of retrograde condensation. However, the rate of increase slows as it approaches the maximum condensation pressure. At lower pressures, the density continues to increase and may even accelerate, which is explained by the evaporation and production of lighter components.
Overall, the findings indicate that the enrichment of residual condensate and the reduction of gas volume during depletion play a key role in the recovery of retrograde losses. These factors should therefore be comprehensively considered when designing and optimizing reservoir development strategies.

References:

1. Fataliyev V.M. Darin gazkondensat yataghlari sharaitinda choxkomponentli karbohidrogen sistemlerinde bash veren faza chevrilmelerinin fiziki-termodinamiki esaslari / Texnika elmleri doktoru dissertasiyasi. – Baki: 2018, 303 s.

2. Hamidov N.N. Karbohidrogen yataghlarinin son ishlenilme merhelesinin nezeri esaslari ve tetbigi aspektleri, onlarin komponentveriminin artirilmasi usullarinin tekmilleshdirilmesi / Texnika elmleri doktoru dissertasiyasi. – Baki: 2024, 321 s.

3. Yang X., Tian J., Wang Q., Li Y., Yang H., Tang Y. et al. Geological understanding and favorable exploration fields of ultra-deep formations in Tarim Basin // China Petroleum Exploration, 2021, № 12, pp. 17-28.

4. Mirzadjanzade A.Kh., Ametov I.M., Kovalev A.G. Fizika neftyanogo i gazovogo plasta. – Moskva: Ijevsk: Institut komp′yuternikh issledovaniy, 2005, 280 s.

5. Abasov M.T., Abbasov Z.Ya., Fataliev V.M., Gamidov N.N., Mamedova G.G. Eksperimental′noe issledovanie vliyaniya rastvorimosti v uglevodorodnikh kondensatakh gazov razlichnogo sostava na pokazateli istoshenia gazokondensatnoy sistemi // Izvestiya NANA, seriya “Nauki o Zemle”, 2006, № 3,  s. 64-69.

6. Fataliev V.M., Gamidov N.N., Mamedova G.G. Termodinamicheskie kharakteristiki flyuidov gazkondensatnikh mestorojdeniy. – Baku: “Nafta-Press”, 2025, 350 s.

7. Gamidov N.N., Fataliev V.M. Vlianie rastvorimosti gazov razlichnogo sostava v uglevodorodnom kondensate na parametry razrabotki gazokondensatnykh mestorojdeniy // SOCAR Proceedings, 2015, № 4, s. 36-40.

8. Gul′tyaeva N.A. Vliyanie rastvorennogo v vode gaza na tekhnologicheskie pokazateli razrabotki mestorojdeniy uglevodorodov // Neftyanoe khozyaystvo, 2018, № 4, s. 52-54. 

9. Dzhalalov G.I., Ibragimov Т.М., Aliev A.A., Gorshkova Ye.V. Мodelirovanie i issledovanie filtratsionnykh prosessov na glubokozalegayushikh mestorajdeniyakh nefti i gaza. – Baku: IPP “Nauka i obrazovanie”, 2018, 382 s.

10. Fataliyev V.M., Salimova S.A., Abbaszade H.R. Assessment of the impact of mutual dissolution in gas-condensate-water systems on reservoir fluid phase behavior under in-situ conditions // SOCAR Proceedings, 2025, № 4, pp. 44-51.

11. Tu H., Zhang R., Guo P. et al. The impact of condensate oil content on reservoir performance in retrograde condensation: A numerical simulation study // Energies, 2024, 17(22), p. 5750.

12. Liao H., He X., Guo P., Wang S., Li Y., Jiang Z., Wang L., Xu R., Tu H. Study on the Impact of Porous Media on Condensate Gas Depletion: A Case Study of Reservoir in Xihu Sag // ACS Omega, 2024 Oct 19; 9(43): 43850-43863.

13. Luo S., Chen F., Zhou D., Nasrabadi H. Multiscale Pressure /Volume/ Temperature Simulation of Decreasing Condensate/Gas Ratio at Greater than Dewpoint Pressure in Shale Gas-Condensate Reservoirs. SPE J. 2021, vol. 26 (06), pp. 4174-4186.

14. Abbasov Z.Y., Fataliyev V.M., Hamidov N.N. The solubility of gas components and its importance in gas-condensate reservoir development // Petroleum Science and Technology, 2017, v. 35, iss. 3, pp. 249-256.

15. Abbasov Z.Y., Fataliyev V.M. The effect of gas-condensate reservoir depletion stages on gas injection and the importance of the aerosol state of fluids in this process // Journal of Natural Gas Sciences and Engineering, 2016, v. 31, pp. 779-790.

16. Li N., Li H., Tan X., Zhang L., Liu Y. Effect of retrograde condensation and stress sensitivity on properties of condensate gas reservoirs // Frontiers in Energy Research, 2023.

17. Igwe U., Khishvand M., Piri M. Retrograde condensation in natural porous media: An in situ experimental investigation. Phys. Fluids, 2022, 34 (1), pp. 1-23.

18. Fataliev V.M., Abbaszade G.R. Vliyanie rastvoreniya gaza v prirodnoy uglevodorodnoy jidkosti na ego retrogradnoe isparenie // Mejdunarodnyy elektronnyy nauchnyy jurnal “Evraziyskiy Soyuz Ucenykh” tekhnicheskie i fiziko-matematicheskie nauki, 2023, t. 1, № 10 (113), s. 37-41.