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Title

Foam Application in Fractured Carbonate Reservoirs: A Simulation Study

Year: 1398
COI: JR_IJOGST-8-4_002
Language: EnglishView: 161
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Authors

Ahmed Zoeir - M.S. Student, Faculty of Petroleum and Natural Gas Engineering, Sahand University of Technology, Tabriz, Iran
Mohammad Chahardowli - Assistant Professor, Faculty of Petroleum and Natural Gas Engineering, Sahand University of Technology, Tabriz, Iran
Mohammad Simjoo - Assistant Professor, Faculty of Petroleum and Natural Gas Engineering, Sahand University of Technology, Tabriz, Iran

Abstract:

Fractured carbonate reservoirs account for 25% of world’s total oil resources and for 90% of Iranian oil reserves. Since calcite and dolomite minerals are oil wet, gas oil gravity drainage (GOGD) is known as the most influencing production mechanism. The most important issue within gas injection into fractured media is the channeling problem which makes the efficiency of gas injection process extremely low. As a solution, foam is used to change the mobility ratio, to increase volumetric sweep efficiency, and to overcome the fingering problem. In this work, we inspected three main influencing mechanisms that affect oil extraction from matrix, namely foam/oil gravity drainage, viscous pressure drop  due to foam flow in fractures, and foaming agent diffusion from fractures into the matrixes. Foam injection simulations were performed using CMG STARS 2015, on a single matrix unit model and on some vertical cross section models. A number of sensitivity analyses were performed on foam strength, injection rate, fracture and matrix properties, matrix heights, and the initial oil saturation within matrixes. The results show that the roles of the mass transfer of the foaming agent and viscous pressure drop  are significant, especially when matrix average heights are small. Moreover, the mechanism for viscous pressure drop  remains unchanged, which continues to aid oil extraction from matrixes while the other two mechanisms weaken with time.

Keywords:

Paper COI Code

This Paper COI Code is JR_IJOGST-8-4_002. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/1015942/

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Zoeir, Ahmed and Chahardowli, Mohammad and Simjoo, Mohammad,1398,Foam Application in Fractured Carbonate Reservoirs: A Simulation Study,https://civilica.com/doc/1015942

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  • Abbaszadeh, M., Rodriguez-De La Garza, F., Yuan, C., and Pope, ...
  • Buchgraber, M., Castanier, L. M., and Kovscek, A. R., Micro-visual ...
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  • Kiani, M., Kazemi, H., Ozkun, E, and Wu, Y. S., ...
  • Kovscek, A. R., Tretheway, D. C., Persoff, P., and Radke, ...
  • Pancharoen, M., Ferno, M. A., and Kovscek, A. R., Modeling ...
  • Zuta, J. and Fjelde, I., Transport of -Foaming Agents During ...
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