Porosity is one of rock important rock properties and it is a measure of pore space in a rock.
Figure 1 – Porosity
Figure 1 shows the illustration of porosity and it can be seen that grain size and distribution can affect porosity of rock.
Porosity (ɸ) is mathematically expressed as a ratio of total void space with a rock to a total volume of rock.
Porosity (ɸ) = (Vp ÷ Vb) × 100
Vp = pore volume
Vb = bulk volume of rock
Porosity (ɸ) is shown in percentage form. Continue reading