Study on Impact of Compositional Gradient on Volatile Oil Reservoir Development

WANG Wendong, DING Shengjun, HE Xinfei, LÜ Yuan, JIN Xiaolin

Abstract


The existing of compositional gradient in volatile oil reservoir makes the reservoir special. It will have great significance in calculating reserves, determining reasonable development mode and improving volatile oil recovery，if the composition profile and vertical distribution characteristic of the underground fluid are considered, when developing volatile oil reservoir. Based on the theory of compositional gradient[1], the paper analyzed the compositional gradient in various kinds of reservoir, researched the impact of compositional gradient on reserves estimation in volatile oil reservoir, and then evaluated the final recovery efficiency of different development modes (depletion, water-flood, gas injection) with the method of compositional numerical simulation. Results show that: If the reservoir fluid contains more light components, the compositional gradient phenomenon will be more obvious; by choosing fluid samples at the middle of the reservoir to calculate reserves of the volatile oil reservoir, accurate value will be obtained; when developing volatile oil reservoirs, the compositional gradient phenomenon affects greater on recovery efficiency of gas injection development than that of depletion and water-flood development. The achievements provide theoretical guidance and basis for volatile oil reservoir development.
Key words: Volatile oil reservoir; Compositional gradient; Compositional simulation; Development mode; Phase behavior


Keywords


Volatile oil reservoir; Compositional gradient; Compositional simulation; Development mode; Phase behavior

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References


[1] Izgec, B., & Barrufet, M. A. (2005). Performance analysis of compositional and modified black-oil models for rich gas-condensate reservoirs with vertical and horizontal wells (Doctoral dissertation). Texas A&M University, USA.

[2] Sage, B. H., & Lacey, W. N. (1938). Gravitational concentration gradients in static columns of hydrocarbon fluids. Trans. AIME, 132, 120-131.

[3] Whitson, C. H., Brulé, M. R. (2001). Phase behavior (pp.1-13). Texas, USA: Society of Petroleum Engineers Inc.

[4] Padua, K. O. (1997, September). Oil composition variation in a large deep water field. Paper presented at Latin American and Caribbean Petroleum Engineering Conference, Brazil.

[5] Syahrial, E. (1999, April). Impact of composition variation with depth on volatile oil. Paper presented at Asia Pacific Oil and Gas Conference and Exhibition, Jakarta, Indonesia.

[6] Barrufet, M. A., & Jaramillo, J. M. (2001). Effects in the determination of oil reserves due to gravitational compositional gradients in near-critical reservoirs. Paper presented at SPE Annual Technical Conference and Exhibition.

[7] Luo, S., & Barrufet, M. A. (2004). Compositional gradient: Its role in near critical reservoir development. Journal of Petroleum Science and Engineering, 45, 193-201.

[8] Zhao, W., & Hu, S. (2006). Variations in fluid flow parameters of reservoirs and their implications in reserves estimation. China Offshore Oil and Gas, (6), 390-393.

[9] Li, J., & Li, X. (2010). Compositional distribution in volatile oil reservoir with compositional gradient. Xinjiang Petroleum Geology, (1), 81-84.

[10] Pedersen, K. S., Christensen, P. L., & Azeem, S. J. (2006). Phase behavior of petroleum reservoir fluids. Boca Raton, USA: CRC Press.

[11] Danesh, A. (2003). PVT and phase behavior of petroleum reservoir fluids. Amsterdam, Netherlands: Elsevier.

[12] Li, J., Jiang, T., Chen, S. M., & Bao, W. M. (2012). Numerical simulation on gas displacement in volatile oil reservoirs considering compositional gradient distribution. Journal of Oil and Gas Technology, 34(5), 107-111.

[13] Firoozabadi, A. (1999). Thermodynamics of hydrocarbon reservoirs. New York, USA: McGraw-Hill.

[14] Whitson, C. H., & Belery, P. (1994, August). Compositional gradients in petroleum reservoirs. Paper presented at University of Tulsa Centennial Petroleum Engineering Symposium, Tulsa, Oklahoma.




DOI: http://dx.doi.org/10.3968/5772

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