Calculate Neutron Porosity - Shale Corrected - Dewan (1983)

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List of equations assignment

Neutron Log Porosity - Shale Corrected -Dewan (1983)

Dewan (1983) also proposed an equation for shale correction of the porosity values derived from neutron well logs, and in the equation, it is included the shale volume value and the neutron porosity value of a nearby shale at the depth of interest. The equation is the following:

Where:
• ɸNe= neutron log porosity - shale corrected
• ɸN= neutron log porosity
• ɸNsh= neutron log porosity in a nearby shale
• Vshale= shale volume

Calculate Neutron Log Porosity (ɸne) - Shale Corrected Dewan (1983)
ɸn: Decimal		Vsh: Decimal
ɸnsh: Decimal

Made by Henry Herrera

Calculate Neutron Porosity - Shale Corrected (Schlumberger, 1975)

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List of equations assignment

Neutron Porosity (ɸne)- Shale Corrected- (Schlumberger, 1975)

In 1975, Schlumberger also proposed an equation for the calculation of neutron derived porosity including shale corrections, which takes into account the porosity value in nearby shale and shale volume. The expression is the following:

Where:
• ɸNe= shale-corrected neutron porosity
• ɸN= neutron derived porosity
• ɸNshale= neutron porosity at a nearby shale
• Vshale= shale volume

Calculate Neutron Porosity (ɸne) - Shale Corrected- Schlumberger (1975)
ɸn: Decimal		ɸnshale: Decimal
Vsh: Decimal

Made by Henry Herrera