Phase behaviour and development scheme of near-critical gas condensate reservoir


Affiliations

  • Petroleum Engineering College of Yangtze University, Hubei, China
  • PetroChina Tarim Oilfield Company 1, Research Institute of Exploration and Development, Korla, 841 000, China

Abstract

Combined with fluid data of J gas reservoir in Africa, the phase characteristics of near-critical gas condensate reservoir were studied, and the applicable development technique were analyzed using reservoir numerical simulation. The results show that the near-critical gas has the following characteristics. It has a high content of condensate oil, the sensitivity of phase is strong, and the degree of retrograde condensation is high. Depletion type of recovery results in great loss of condensate oil and poor production, the method of water-oil alternating recovery could control the level of condensate effectively and get a high oil production rate. In addition, it avoids the rising up of water cut too early and quickly in the method of water flooding. Water-oil alternating recovery is the best producing method which combined the advantages of water injection and gas injection. Further study on sensible factors in water-oil alternating recovery indicates that the water/ gas ratio (WGR) has the greatest impact on production effect. When the WGR is too high, injected water will rush into the well bottom too early; when the WGR is too low, the advantage of water injection to displace and provide pressure is lost, and condensate oil production rate cannot be enhanced.

Keywords

Gas condensate reservoir, near-critical, phase behaviour, water-oil alternating recovery.

Full Text:

References

Fu, Xiujuan, Sun, Zhidao, Liu, Ju, Xia, Jing and Luo, Kai (2007): “Phase behavior of fluid and development characteristics of Hua Chang near-critical hydrocarbon reservoir,†Acta Petrolei Sinica,Vol. 28, No. 6, pp 96-102.

Liu, Ping, Sun, Lei and Zeng, Youxin (2006): “EOS application to near-critical hydrocarbon system and its improvement,†Natural Gas Exploration and development, Vol. 29, No. 1, pp 59-62.

Shen, Pingping, Zheng, Xitan and Li, Shi (2001): “Nearcritical phenomenal of rich gas condensate systems and experimental investigation,†Acta Petrolei Sinica, Vol. 2, No. 3, pp 47-51.

Luo, Kai (1999): “A discussion on the layering of nearcritical gas condensate in PVT cell,†Petroleum Exploration and Development, Vol. 26, No. 1, pp 68-70.

Shen, Pingping, Zheng, Xitan and Li, Shi (2001): “Retrograde condensation phase change in near-critical hydrocarbon system,†Petroleum Exploration and Development, Vol. 28, No. 1, pp 72-74.

Al-Majed, A. A., King, F. A. and Doughterty, E. L. (1991): “Avriable cell model for simulating gas condensate reservoir performance,†SPE 21428, pp 769-780.

Jessen, K., Gerritsen, M. G. and Mallison, B. T. (2008): “High-resolution prediction of enhanced condensate recovery processes,†SPE 99619-PA – SPE Journal, pp 257-266.

Zheng,, Xiaomin, Zhong, Lijun and Yan, Wende (2008): “Approach to condensate gas reservoir development schemes,†Special Oil and Gas Reservoirs, Vol. 15, No. 6, pp 59-63.


Refbacks

  • There are currently no refbacks.