Sensitivity Analysis of Cumulative Oil Production and Production Rate on Block Heights and Capillary Continuity for an Iranian Carbonated Fractured Reservoir

Document Type : Research Article

Authors

Faculty of Chemical Engineering, Amirkabir University of Technology Tehran, I.R. IRAN

Abstract

Block heights and capillary continuity between matrix blocks play paramount role in the sensitivity analysis and therefore the history matching of cumulative oil production and production rate of carbonated fractured reservoirs. In this study, the influence of these parameters upon cumulative production and recovery factor of an Iranian fractured reservoir were studied by the usage of a simulator. Results show that, changing the block heights greatly affect on the cumulative production as well as the recovery factor. Also sensitivity analysis reveals that, the variations in cumulative production and recovery factor happen in a limited range of block heights. The aforementioned ranges of block heights for the studied reservoir were twice the height and one tenth of the height of the block height used in the history matching during the reservoir simulation. For block heights shorter than the original one, the influence of capillary continuity is paramount by increasing the cumulative production as well as the recovery factor. However, as the block height increased and reached twice the height of the original height, the influence of capillary continuity decreased and the system behaved similar to the situation where the block height was doubled without taking capillary continuity into consideration.  

Keywords

Main Subjects

References

[1] Mehdi Jafari et al., Gravity Drainage Mechanism and Estimation of Oil Recovery in Iranian Carbonate Cores' Petroleum & Coal, (2008).
[2] Barenblatt, G.E, Zheltov, I.P. and Kochina, I.N., Basic Concepts in the Theory of Seepage of Homogeneous Liquids in Fissured Rocks, J. Appl. Math. and Mech., p. 1286 (1960).
[3] Saidi, A., Simulation of Naturally Fractured Reservoir, Paper SPE12270 Presented at the SPE Symposium on Reservoir Simulation, San Francisco, November 16-18 (1983).
[4] Ferno, M.A., Ersland, G., Haugen, A., Stevens, J. and Howard, J.J., "Visualizing Fluid Flow with Mariin Oil-Wet Fractured Carbonate Rock" SCA2007-12 (2007).
[5] Eirik Aspenes, "Wettability Effects on Oil Recovery Mechanismsin Fractured Chalk", Bergen, November, (2006).
[6] Saidi, A., Tehrani, D.H. and Wit, K., 1980. “Mathematical Simulation of Fracture Reservoir Performance, Based on Physical Model Experiments”, Developments in Reservoir Engineering, paper PD 10 (3)-Proceedings 10th World Petroleum Congress (1979).
[7] Horie, T., Firoozabadi, A., Ishimoti,. K., Laboratory Studies of Capillary Interaction in Fracture Reservoir Systems, SPE-18282, SPE Reservoir Engineering, 5 (3), p. 353 (1990).
[8] Stones, E.J., Mardsen, S.S. and Zimmerman, S.A. “Gravity-Induced Drainage from Fractured Porous Media”, SPE 24042, Presented at the Western Regional Meeting, Bakersfield, CA, March 30-April 1, (1992).
[9] Festoy, S. and Van Golf-Racht, T.D., Gas Gravity Drainage in Fracture Reservoir through New Dual Continuum Approach”, SPE Reservoir Engineering, Aug., p. 271-278 (1989).
[10] Sajadian, V.A., NIOC Research Institute of Petrleum Industry, Danesh, A., Tehrani, D.H., Heriote-Wett University, Laboratory Studies of Gravity Drainage Mechanism in Fractured Carbonate Reservoir-Capillary Continuity”, SPE 494970,(1998).
[11] Sajadian, V.A., NIOC Research Institute of Petrleum Industry, Danesh, A., Tehrani, D.H., Heriote-Wett University, “Laboratory Studies of Gravity Drainage Mechanism in Fractured Carbonate Reservoir-Reinfilteration”, SPE 54003 (1999).
[12] Mahendra Prarap, SPE, ONGC Ltd, India, Jon Kleppe, SPE, NTNU, Norway and Knut Uleberg, NTNU, Norway, “Vertical Capillary Continuity Between the Matrix Blocks in a Fracture Reservoir Significantly Improves the Oil Recovery by Water Displacement”, SPE 37725 (1997).
[13] PARSI FIELD Full Field Study and Master Development Plane Phase 2, Conteract NO. MED-79144-MEOL-Extention, Parsi Field Geology Report, August 2005, Kanaz Moshaver.
[14] Kazemi, H, Merrill, L.S., Jr., Porterfield, K.L. and Zeman, P.R., Numerical Simulation of Water-Oil Flow in Naturally Fracture Reservoir, Soc. Pet. Eng. J., 16, p. 317 (1976).
[15] Parsi Full Field Model, Reservoir Fluid Characteristics and Core Analysis, Reservoir Engineering, Sub Volume 2.6. (2005).
Iranian Journal of Chemistry and Chemical Engineering
Volume 28, Issue 3 - Serial Number 51
September 2009
Pages 15-23

Files

Share

How to cite

Statistics