A New Method for the Dynamic Reserves of Gas Condensate Reservoir Using Cyclic Gas Injection Based on the Effects of Reinjection Ratio and Water Influx


As we all know, cyclic gas injection is one of the most effective development methods to improve condensate oil recovery. When dealing with the calculation of the reserves, the injection-production differences and water influx create great influence on the accuracy. Based on the existing research, we proposed a new material balance equation which considered the differences of composition between produced and injected fluids and the effect of water influx, and a solution was provided in this paper. The results of the method are closer to the actual situation because they are built on the law of conservation of mass, and the using of curve fitting method can not only avoid the use of water influx coefficient but also obtain the water influx rate and reserves at the same time. The YH-23 gas condensate reservoir is taking as a typical subject to do the research, which has been exploited by cycle gas injection for 14 years. Three different methods are used to calculate the reserves, and the results show that the method proposed in this paper has minimum error of 2.96%.

Share and Cite:

Xiong, Y. , Wang, L. , Zhu, Z. and Xie, W. (2015) A New Method for the Dynamic Reserves of Gas Condensate Reservoir Using Cyclic Gas Injection Based on the Effects of Reinjection Ratio and Water Influx. Engineering, 7, 455-461. doi: 10.4236/eng.2015.77041.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Vo, D.T., Jones, J. and Raghaven, R. (1989) Performance Predications for Gas Condensate Reservoirs. SPE Formation Evaluation, SPE-16984-PA.
[2] Gus Alvarado, J.L., Le Blanc, F. and Farshad, F. (1992) A New and Improved Material Balance Equation for Retrograde Gas Condensate Reservoirs—Part I. SPE Rocky Mountain Regional Meeting, Casper, Wyoming, 18-21 May 1992, SPE-24355-MS.
[3] Hsieh, F.S., Vega, C. and Vega, L. (2002) Material Balance as a Horizontal Line for a Gas-Condensate Reservoir. SPE Gas Technology Symposium, Calgary, 30 April-2 May 2002, SPE-75516-MS.
[4] Nasiri Ghiri, M., Nasriani, H.R., Sinaei, M., et al. (2015) Gas Injection for Enhancement of Condensate Recovery in a Gas Condensate Reservoir. Energy Sources, Part A: Recovery, Utilization and Environmental Effects, 37, 799-806.
[5] Moradi, B., Tangsiri Fard, J., Rasaei, M.R., et al. (2010) Effect of Gas Recycling on the Enhancement of Condensate Recovery in an Iranian Fractured Gas Condensate Reservoir. Trinidad and Tobago Energy Resources Conference, Trinidad, 27-30 June 2010, SPE-132840-MS.
[6] Smith, L.R. and Yarborough, L. (1968) Equilibrium Revaporization of Retrograde Condensate by Dry Gas Injection. Society of Petroleum Engineers Journal, 8, 87-94.
[7] Torrens, R., Mohamed, M.E., Al Bairaq, A., et al. (2014) Integrated Asset Modeling of a Gas Condensate Field Operating Under Gas Recycling Mode. Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 10-13 November 2014, SPE-171988-MS.
[8] Kang, X.D., Li, X.F., Li, J.S., et al. (2005) Material Balance Equation of Condensate Reservoirs Exploited by Cycle Gas Injection Considering the Injection-Production Difference. Natural Gas Industry, 25, 118-120.
[9] Jiao, Y.W., Li, B.Z., Jiang, M.Q., et al. (2010) Material Balance Equation of Condensate Gas Reservoirs with Bottom Water in Cyclic Gas Injection and Its Application. Journal of Oil and Gas Technology, 32, 325-327.
[10] Danesh, A. (1998) PVT and Phase Behaviour of Petroleum Reservoir Fluids. Elsevier Science Ltd., Oxford.
[11] Chen, Y.Q. (1993) The Calculation Method an Application of Equivalent Volume of Condensate Oil. Natural Gas Industry, 13, 57-59.
[12] Marques, J.B. and Trevisan, O.V. (2007) Classic Models of Calculation of Influx: A Comparative Study. Latin American & Caribbean Petroleum Engineering Conference, Buenos Aires, 15-18 April 2007, SPE-107265-MS.
[13] Zhang, L.Y. and Li, J. (1998) Curve Fitting Method for Calculation of the Dynamic Reserves of Water Drive Gas Reservoir. Natural Gas Industry, 18, 26-29.
[14] Jiang, T.W., Zhu, Z.Q., Xiong, Y., et al. (2013) Dynamic Analytic Method and Practice of Condensate Gas Reservoir Developed by Cyclic Gas Injection. Petroleum Industry Press, Beijing, 136.

Copyright © 2022 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.