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5 Porosity & Permeability

Porosity is defined as the percentage of void space within a material's total volume. It is calculated by dividing the total volume of pore space by the total volume of the material, then multiplying by 100. Alternatively, porosity can be calculated by dividing the total volume minus the volume of grains by the total volume, then multiplying by 100. This measurement expresses the proportion of space occupied by voids rather than solid material within the total sample volume.

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153 views9 pages

5 Porosity & Permeability

Porosity is defined as the percentage of void space within a material's total volume. It is calculated by dividing the total volume of pore space by the total volume of the material, then multiplying by 100. Alternatively, porosity can be calculated by dividing the total volume minus the volume of grains by the total volume, then multiplying by 100. This measurement expresses the proportion of space occupied by voids rather than solid material within the total sample volume.

Uploaded by

Naser Khan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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I.

Porosity (P)
The proportion of any material that is void space, expressed as a
percentage of the total volume of material.

VP
P 100
VT

Where VP is the total volume of pore space


and VT is the total volume of rock or
sediment.

In practice, porosity is commonly based on measurement of the total


grain volume of a granular material:

VT VG
P
100
VT

Where VG is the total volume of


grains within the total volume of
rock or sediment.

VP VT VG

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