Porosity

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List of equations assignment

Porosity

Porosity is an important petrophysical parameter of the rock, which is defined as the relationship the rock pores volume and the rock total volume.

Porosity = pore volume / total rock volume

This physical property limitates the rock by the time of accumulating hydrocarbons (oil, condensates or gas), however, porosity must be interconnected to add commercial value to a reservoir.

There are total porosity and effective porosity, where the first one is related to all the pores of a rock, and the second one, to the interconnected pores only, which is more important by the time of producing hydrocarbons.

In addition, the shale volume affects reservoirs quality, and that is why corrections have to be made by time of calculating porosity, the ones known as shale corrected values.

At the above window, you can find the ways to calculate porosity values derived from differrent well logs: density, neutron, sonic, and resistivity. There are different authors for porosity calculations from diverse well logs.

You can calculate the following Porosity Equations:

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Made by Henry Herrera