Calculation method of component and phase composition of gas condensate mixture in near-wellbore reservoir

About the authors:

Aleksandr B. Shabarov, Dr. Sci. (Tech.), Professor, Honored Scientist of the Russian Federation, Professor, Department of Applied and Technical Physics, School of Natural Science, University of Tyumen, Tyumen, Russia; a.b.shabarov@utmn.ru, https://orcid.org/0000-0002-5374-8704
Sergey A. Zanochuev, Cand. Sci. (Tech.), Head of the Department of Research of Properties of Formation Fluids, Tyumen Oil Research Center; ORCID, szanochuev@mail.ru

Abstract:

The physic-mathematical model of quasi-one-dimensional time dependent flow and corresponding calculation method propose and establish a dependency of phase changes intensity on fluid parameters and filtration characteristics of the reservoir during the filtration of gas condensate mixture. In accordance with the proposed method there were found patterns of “condensate banking” formation—a condensate accumulation in near-wellbore reservoir. There were established a dependency of the density changes, single phase flows (gas, condensate) and components on the radius between the well and external boundary and on the time of exploitation. A calculated-parametric study of change of both component and phase composition of gas condensate mixture in near-wellbore reservoir was made. The results of a typical example calculation based on the real gas condensate mixture showed that condensate accumulation in near-wellbore reservoir during well exploitations with a lower bottom hole pressure hugely affects both liquid and gas phases reallocation as well as mass flow rate of the recovered product.

References:

1. Wang, P., Pope, G.A., Proper use of equations of state for compositional reservoir simulation SPE 69071 // Journal of Petroleum Technology, Vol. 53. № 7. 2001. Pp.74–81.

2. Peng, D.-V., Robinson, D.B. A new two constant equation of state // Ynd. Eng, Chem. Fundament. Vol. 15. 1976. Pp. 59–64.

3. Soave, G. Equilibrium constants from a modified Redlich-Kwong equation of state // Chemical Engineering Science. № 6. 1976. Pp. 1197–1207.

4. Brusilovsky, A.I., Nugaeva, A.N. Teoriia i praktika obosnovaniia svoistv prirodnykh uglevodorodnykh sistem: Obz. inf. // Ser. «Geologiia, burenie, razrabotka i ekspluatatsiia gazovykh i gazokondensatnykh mestorozhdenii». Theory and practice of the properties of natural hydrocarbon systems. Moscow, 2008. 112 p. (in Russian).

5. Afidick Deddy, Kaczorowski, N.J., Bette Srinivas Production performance of a retrograde gas reservoir: a case study of the Arun field SPE 28749, 1994.

6. Shandrygin, A., Rudenko, D. Condensate skin evaluation by the means of transient pressure analysis // Society of Petroleum Engineers. doi:10.2118/97027-MS. 2005.

7. Kalla, S., Leonardi, S.A., Berry, D.W., Poore, L.D., Sahoo, H., Kudva, R. A., & Braun, E. Factors that affect gas-condensate relative permeability // Society of Petroleum Engineers. doi:10.2118/173177-PA. 2014.

8. Zanochuev, S.А. Prognozirovanie plastovykh poter' i soderzhaniia UV S5+ v plastovom gaze pri snizhenii davleniia na osnove optimizatsionnoi zadachi // Aktual'nye voprosy issledovaniia plastovykh sistem mestorozhdenii uglevodorodov: sb. nauchnykh statei: v 2 ch. Prediction of reservoir losses and C5+ content of hydrocarbons in the reservoir gas pressure reduction on the basis of the optimization problem // Topical research issues of hydrocarbon systems formation: collection of scientific articles. Moscow: Gazprom Vniigaz. Part 1. 2011. Pp. 34–42.

(in Russian).

9. Rudenko, D., Rymarenko, K. Method for C5+ content estimation in produced gas condensate // Society of Petroleum Engineers. doi:10.2118/166912-RU. 2013.

10. Shabarov, A.B. Fiziko-khimicheskaia model' i metod rascheta techeniia gazokondensatnoi smesi v plaste // Vestnik Tiumenskogo gosudarstvennogo universiteta. 2014. №7. Fiziko-matematicheskie nauki. Informatika s. 7 – 18. Physical-mathematical model and flow method of gas-condensate mixture in reservoir // Bulletin of Tyumen State Oil and Gas University. № 7. Physical-mathematical Science. Computer Science. 2014. Pp. 7–18. (in Russian).

11. Shabarov, A.B. Gidrogazodinamika. Fluid and gas dynamics. Tyumen, 2013. 404 p.(in Russian).

12. Nigmatulin, R.I., Dinamika mnogofaznykh sred. Ch II. Dynamic of multiphase systems. Part 2. Moscow: Nauka, 1980. 360 p. (in Russian).

13. Basniev, K.S., Kochina, I.N., Maksimov, V.M. Podzemnaia gidromekhanika Reservoir hydromechanics. Moscow: Nedra, 1993. 416 p. (in Russian).

14. Deng, H., Chen, Z., Dong, C., Nikpoor, M.H. Compositional simulation of condensate banking coupled with reservoir geomechanics, SPE, University of Calgary 168671-MS SPE Conference Paper. 2013.

15. Altunin, A.E., Sokolov, S.V., Stepanov, S.V., Cheremisin, A.N., Shabarov, A.B. Raschetnyi metod polucheniia otnositel'nykh fazovykh pronitsaemostei na osnove resheniia obobshchennykh uravnenii Bernulli dlia sistemy porovykh kanalov // Neftepromyslovoe delo. 2013, №8 s. Calculation method of receiving relative phase permeability based on solution of Bernulli generalized equations for a system of porous channels // Oilfield Engineering. № 8. 2013. Pp. 40–46. (in Russian).

16. Brusilovsky, A.I. Fazovye prevrashcheniia pri razrabotke mestorozhdenii nefti i gaza. Phase transitions at oil and gas development. Moscow, 2002. 575 p. (in Russian).

17. Grigoryev, B.A. Gerasimov, A.A., Lanchakov, G.A. Fazovye prevrashcheniia pri razrabotke mestorozhdenii nefti i gaza. Thermophysical properties and phase equilibrium of gas condensates. Moscow, 2007. 344 p. (in Russian).