International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies


:: International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies

ISSN 2228-9860
eISSN 1906-9642



  • Rapid Calculation of Well Productivity in Gas-condensate Reservoirs

    Ashkan Arfanezhad , Poplygin Vladimir Valerievich (Perm National Research Polytechnic University, Perm, RUSSIA).

    Disciplinary: Petroleum Engineering.

    ➤ FullText

    doi: 10.14456/ITJEMAST.2022.112

    Keywords: Gas-condensate reservoir, Well productivity, Uncertainty, Dew point pressure, Condensate blockage

    The calculation of well efficiency in gas-condensate reservoirs is one of the significant challenges in such reservoirs. Condensate Blockage is assumed as one of the most serious hurdles in Iran's gas reservoirs. When the pressure falls below the dew point pressure, the lower the pressure, the more condensed liquid is formed in the reservoir. Due to the higher pressure difference, this phenomenon is very common in near wellbore regions. If liquids are formed in the reservoir, in addition to the economic losses due to the retention of components with hydrocarbon value, they will also reduce the gas relative permeability and well productivity. The productivity calculation in gas-condensate wells requires performing numerical simulations and downscaling technique of the local grids around the wellbore. Otherwise, the effects of gas velocity as well as the phenomenon of condensate formation around the wellbore are ignored in the calculations, which leads to inaccurate well productivity estimates. The mentioned complexities make the calculation of gas-condensate well productivity more time-consuming while using the numerical simulation method. On the other hand, since the reservoir and well characteristics including reservoir dimensions, porosity, permeability, etc. are uncertain in early life of the reservoir, it is necessary to calculate the well productivity thousands of times so that the uncertainty effects of the input parameters are estimated by statistical methods. In this paper, we first introduced an analytical method for the rapid calculation of well productivity by considering the effects of velocity and condensate formation around the wellbore with different geometric shapes, including vertical, horizontal, and hydraulically-fractured wells. Then, using Monte Carlo simulation, the effects of uncertainty in different input parameters upon the productivity coefficient were investigated and ultimately a model was presented.

    Paper ID: 13A6G

    Cite this article:

    Arfanezhad, A., Valerievich, P. V. (2022). Rapid Calculation of Well Productivity in Gas-condensate Reservoirs. International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 13(6), 13A6G, 1-16. http://TUENGR.COM/V13/13A6G.pdf DOI: 10.14456/ITJEMAST.2022.112


  1. 'Dell, H. G., Miller, R. N., "Successfully cycling a low permeability, high yield gas condensate reservoir", paper SPE 1495 presented at the SPE 41st Annual Fall Meeting, Dallas, Texas, October 1966
  2. Fussel, D.D., "Single-Well Performance Prediction for Gas-Condensate Reservoirs", JPT (Jan 1973) 258: Trans., AINW, 255
  3. Fevang, and Whitson, C.H. "Modeling Gas-Condensate Well Deliverability," paper SPE 30714 presented at SPE Annual Technical conference and Exhibition, Dallas, Oct 1995.
  4. Mott, R.: "Engineering calculation of Gas-Condensate well Productivity," paper SPE 77551 presented at SPE Annual Technical and Exhibition, San Antonia, Oct 2002
  5. Xiao J.J., Ahmad J. AL-Muraikhi; "A New Method for The Determination Gas-Condensate well production performance SPE paper, 2004, SPE 90290
  6. Mott R., "Engineering calculations of gas-condensate-well productivity," SPE Reservoir Evaluation & Engineering, Vol. 6, No. 05, pp. 298-306, 2003.
  7. Murtha J., "Some challenges for monte carlo simulation," The Way Ahead, Vol. 2, No. 02, pp. 13-18, 2006.
  8. Luo H., Mahiya G., Pannett S. and Benham Ph. H., "The use of rate-transient-analysis modeling to quantify uncertainties in commingled tight gas production-forecasting and decline-analysis parameters in the alberta deep basin," SPE Reservoir Evaluation & Engineering, Vol. 17, No. 02, pp. 209-219, 2014.
  9. Xiao J. J. and Al-Muraikhi A. J., "A new method for the determination of gas condensate well production performance," SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2004.
  10. Panja P. and Deo M., "Factors that control condensate production from shales: surrogate reservoir models and uncertainty analysis," SPE Reservoir Evaluation & Engineering, Vol. 19, No. 01, pp.130-141, 2016.
  11. Whitson C. H., Fevang ø. and Saevareid A., "Gas condensate relative permeability for well calculations," Transport in Porous Media, Vol. 52, No. 2, pp. 279-311, 2003.
  12. Jamiolahmady M., Sorabi M., Ireland S. and Ghahri P., "A generalized correlation for predicting gas-condensate relative permeability at near wellbore conditions," Journal of Petroleum Science and Engineering, Vol. 66, No. 3, pp. 98-110, 2009.
  13. Diyashev I. R. and Economides Michael J., "The dimensionless productivity index as a general approach to well evaluation," SPE Production & Operations, Vol. 21, No. 03, pp. 394-401, 2006.
  14. Henderson Graeme D., Danesh A., Al-kharusi B. and Tehrani D., "Generating reliable gas condensate relative permeability data used to develop a correlation with capillary number," Journal of Petroleum Science and Engineering, Vol. 25, No. 1, pp. 79-91, 2000.

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