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- Relative_permeability abstract "In multiphase flow in porous media, the relative permeability of a phase is a dimensionless measure of the effective permeability of that phase. It is the ratio of the effective permeability of that phase to the absolute permeability. It can be viewed as an adaptation of Darcy's law to multiphase flow. For two-phase flow in porous media given steady-state conditions, we can writewhere is the flux, is the pressure drop, is the viscosity. The subscript indicates that the parameters are for phase . is here the phase permeability (i.e., the effective permeability of phase ), as observed through the equation above.Relative permeability, , for phase is then defined from as where is the permeability of the porous medium in single-phase flow, i.e., the absolute permeability. Relative permeability must be between zero and one.In applications, relative permeability is often represented as a function of water saturation, however due to capillary hysteresis, one often resorts to one function or curve measured under drainage and one measured under imbibition.Under this approach, the flow of each phase is inhibited by the presence of the other phases. Thus the sum of relative permeabilities over all phases is less than 1. However, apparent relative permeabilities larger than 1 have been obtained since the Darcean approach disregards the viscous coupling effects derived from momentum transfer between the phases (see assumptions below). This coupling could enhance the flow instead of inhibit it. This has been observed in heavy oil petroleum reservoirs when the gas phase flows as bubbles or patches (disconnected).".
- Relative_permeability wikiPageID "8966784".
- Relative_permeability wikiPageRevisionID "598238352".
- Relative_permeability hasPhotoCollection Relative_permeability.
- Relative_permeability subject Category:Fluid_dynamics.
- Relative_permeability subject Category:Porous_media.
- Relative_permeability type Abstraction100002137.
- Relative_permeability type Company108058098.
- Relative_permeability type Group100031264.
- Relative_permeability type Institution108053576.
- Relative_permeability type Organization108008335.
- Relative_permeability type PorousMedia.
- Relative_permeability type SocialGroup107950920.
- Relative_permeability type YagoLegalActor.
- Relative_permeability type YagoLegalActorGeo.
- Relative_permeability type YagoPermanentlyLocatedEntity.
- Relative_permeability comment "In multiphase flow in porous media, the relative permeability of a phase is a dimensionless measure of the effective permeability of that phase. It is the ratio of the effective permeability of that phase to the absolute permeability. It can be viewed as an adaptation of Darcy's law to multiphase flow. For two-phase flow in porous media given steady-state conditions, we can writewhere is the flux, is the pressure drop, is the viscosity.".
- Relative_permeability label "Relative permeability".
- Relative_permeability sameAs m.027rk79.
- Relative_permeability sameAs Q7310797.
- Relative_permeability sameAs Q7310797.
- Relative_permeability sameAs Relative_permeability.
- Relative_permeability wasDerivedFrom Relative_permeability?oldid=598238352.
- Relative_permeability isPrimaryTopicOf Relative_permeability.