Calculate Permeability K - NMR Log

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List of equations assignment

Permeability NMR

It is also possible to calculate permability from nuclear magnetic resonance well logs (NMR). The equation for the calculation of NMR-derived permeability, includes a constant that depends of the formation type, NMR derived porosity, and T2 distribution. The expression is the following:

Where:
• k= NMR-derived permeability
• a= a constant, depending on formation
• ɸNMR= NMR-derived effective porosity
• T2gm= geometric mean of the T2 distribution

Calculate Permeability (k)- NMR
a:		ɸnmr: Decimal
T2gm:

Made by Henry Herrera

Calculate Permeability K - NMR Log - Three-fluid Model - (Coates)

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List of equations assignment

NMR Permeability- Three-fluid Model - (Coates)

The autor Coates, proposed an equation known as the "three-fluid model", based on nuclear magnetica resonance well log (NMR). This equation considers the NMR derived porosity, and some constants that depend on the formation type, and the proportion of fluids filling the reservoir pores. The equation is the following:

Where:
• k= NMR-derived permeability
• ɸNMR= NMR-derived effective porosity
• C= constant, depending on formation
• FFI= proportion of moveable fluids occupying effective porosity
• BVI= proportion of capillary-bound fluids occupying effective porosity

Calculate Permeability (k)- NMR - Coates
ɸnmr: Decimal		C:
FFI:		BVI:

Made by Henry Herrera