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Moghadasi et alios [10] evaluated Corey, Chierici and LET correlations for oil/water relative permeability using a sophisticated method that takes into account the number of uncertain model parameters. They found that LET, with the largest number (three) of uncertain parameters, was clearly the best one for both oil and water relative permeability.
The concept of permeability is of importance in determining the flow characteristics of hydrocarbons in oil and gas reservoirs, [4] and of groundwater in aquifers. [5]For a rock to be considered as an exploitable hydrocarbon reservoir without stimulation, its permeability must be greater than approximately 100 md (depending on the nature of the hydrocarbon – gas reservoirs with lower ...
Craig [1] proposed three rules of thumb for interpretation of wettability from relative permeability curves. These rules are based on the value of interstitial water saturation, the water saturation at the crossover point of relative permeability curves (i.e., where relative permeabilities are equal to each other), and the normalized water permeability at residual oil saturation (i.e ...
Also, TEM-function can be used for averaging relative permeability curves (for each fluid phase separately, i.e., water, oil, gas, CO 2). [1]
In physics and engineering, permeation (also called imbuing) is the penetration of a permeate (a fluid such as a liquid, gas, or vapor) through a solid.It is directly related to the concentration gradient of the permeate, a material's intrinsic permeability, and the materials' mass diffusivity. [1]
Weakly oil wet -0.3 0 Weakly water wet 0 0.3 Water wet 0.3 1 See also. Capillary pressure; Imbibition; Leverett J-function; Multiphase flow; Relative permeability;
Relative permeability of a phospholipid bilayer to various substances [1] Type of substance Examples Behaviour Gases CO 2, N 2, O 2: Permeable Small uncharged polar molecules Urea, water, ethanol: Permeable, totally or partially Large uncharged polar molecules glucose, fructose: Not permeable Ions K +, Na +, Cl −, HCO 3 −: Not permeable ...
It has been known for decades that the addition of cholesterol to a fluid phase bilayer decreases its permeability to water. [6] [7] The mode of this interaction has more recently been shown to be due to cholesterol intercalating between lipid molecules, filling in free space and decreasing the flexibility of surrounding lipid chains. [8]