Permeability - Coates & Dumanoir (1973)

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Permeability- Coates & Dumanoir (1973)

Where:
• K= permeability in milidarcys
• Rw= formation water resistivity at formation temperature
• Rt irr= true formation resistivity from a formation at irreducible water saturation (Swirr)
• ɸ = porosity
• C= Coates and Dumanoir constant
• W= Coates and Dumanoir constant

Calculate Permeability (k)
c		ɸ (dec)
W		Rw (ohm-m)
Rwtirr (ohm-m)

Results

Permeability Results (k)
c	ɸ (dec)	W	Rw (ohm-m)	Rwtirr (ohm-m)	k (mD)

Constant W

Where:
• Rw= formation water resistivity at formation temperature
• Rt irr= true formation resistivity from a formation at irreducible water saturation (Swirr)
• ɸ= porosity

Calculate Constant W
ɸ (dec)		Rw (ohm-m)
Rwtirr (ohm-m)

Results

result Constante W
ɸ (dec)	Rw (ohm-m)	Rwtirr (ohm-m)	W

Constant C

Where:
• ρh = hydrocarbon density in g / cm3

Calculate Constant C
ρh: g/cm3

Results

Constant C Results
ρh (g/cm3)	C

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Made by Henry Herrera