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http://dx.doi.org/10.9719/EEG.2011.44.2.161

Development of Multiphase Flow Simulator Using the Fractional Flow Based Approach for Wettability Dependent NAPL Migration  

Suk, Hee-Jun (Geologic Environment Division, Korea Institute of Geosciences and Mineral Resources)
Yeo, In-Wook (Department of Earth and Environmental Sciences, Chonnam National University)
Lee, Kang-Kun (School of Earth and Environmental Sciences, Seoul National University)
Publication Information
Economic and Environmental Geology / v.44, no.2, 2011 , pp. 161-170 More about this Journal
Abstract
The multiphase flow simulator, CHEMPS, was developed based on the fractional flow approach reported in the petroleum engineering literature considering fully three phase flow in physically and chemically heterogeneous media. It is a extension of MPS developed by Suk and Yeh (2008) to include the effect of wettability on the migration of NAPL. The fractional flow approach employs water, total liquid saturation and total pressure as the primary variables. Most existing models are limited to two-phase flow and specific boundary conditions when considering physically heterogeneous media. In addition, these models focused mainly on the water-wet media. However, in a real system, variations in wettability between water-wet and oil-wet media often occur. Furthermore, the wetting of porous media by oil can be heterogeneous, or fractional, rather than uniform due to the heterogeneous nature of the subsurface media and the factors that affect the wettability. Therefore, in this study, the chemically heterogeneous media considering fractional wettability as well as physically heterogeneous media were simulated using CHEMPS. In addition, the general boundary conditions were considered to be a combination of two types of boundaries of individual phases, flux-type and Dirichlet type boundaries.
Keywords
multiple phase flow; fractional flow approach; physically and chemically heterogeneous media;
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