About: Lak wettability index

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In petroleum engineering, Lak wettability index, developed by is a quantitative indicator to measure wettability of rocks from relative permeability data. This index is based on a combination of Craig's first rule. and modified Craig's second rule where and and are two constant coefficients defined as: and if and if and if To use the above formula, relative permeability is defined as the effective permeability divided by the oil permeability measured at irreducible water saturation.

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  • In petroleum engineering, Lak wettability index, developed by is a quantitative indicator to measure wettability of rocks from relative permeability data. This index is based on a combination of Craig's first rule. and modified Craig's second rule where : Lak wettability index (index values near -1 and 1 represent strongly oil-wet and strongly water-wet rocks, respectively) : Water relative permeability measured at residual oil saturation : Water saturation at the intersection point of water and oil relative permeability curves (fraction) : Residual oil saturation (in fraction) : Irreducible water saturation (in fraction) : Reference crossover saturation (in fraction) defined as: and and are two constant coefficients defined as: and if and if and if To use the above formula, relative permeability is defined as the effective permeability divided by the oil permeability measured at irreducible water saturation. (en)
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  • In petroleum engineering, Lak wettability index, developed by is a quantitative indicator to measure wettability of rocks from relative permeability data. This index is based on a combination of Craig's first rule. and modified Craig's second rule where and and are two constant coefficients defined as: and if and if and if To use the above formula, relative permeability is defined as the effective permeability divided by the oil permeability measured at irreducible water saturation. (en)
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  • Lak wettability index (en)
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