Pore-Level Investigation of Oil-Mobility Enhancement in Heavy-Oil Reservoirs
- Julian D. Ortiz-Arango (University of Calgary) | Apostolos Kantzas (University of Calgary)
- Document ID
- Society of Petroleum Engineers
- Journal of Canadian Petroleum Technology
- Publication Date
- May 2011
- Document Type
- Journal Paper
- 59 - 74
- 2011. Society of Petroleum Engineers
- 5.3.1 Flow in Porous Media, 5.3.2 Multiphase Flow
- porous medium, viscous coupling, relative permeability, heavy oil, capillary model
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- 421 since 2007
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One of the most important properties for understanding multiphase flow in porous media is relative permeability. In two-phase flow, the relative permeability to a given phase is generally assumed only to be a function of its saturation, independent of the properties of fluids involved and/or flow conditions and ranging from zero to unity.
Considering the physical principles of multiphase flow through porous media, the momentum transfer or viscous coupling appears as a hidden driving mechanism that might lead to higher than expected oil-flow rates.
In an effort to provide a better understanding of oil mobility in heavy-oil reservoirs, a capillary model is used to assess the importance of lubrication in two-phase flow and to determine the effect of the viscous coupling on relative permeabilities. Different cross-sectional geometries are analyzed. The problem is addressed analytically even for the unequal-viscosity case by making use of the Galerkin method. The concept of contact angle is used in the determination of the fluid distribution inside a noncircular channel.
The model results show that the viscosity ratio theoretically affects relative permeabilities, especially in systems involving heavy oil.
|File Size||1 MB||Number of Pages||16|
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