Can porosity be more than 1?

Porosity is a fraction between 0 and 1, typically ranging from less than 0.005 for solid granite to more than 0.5 for peat and clay.

What is a reservoir porosity?

Porosity of reservoir is the property that tells how porous a rock is. It is also defined as a measure of the capacity of reservoir rocks to contain or store fluids. The porosity is genetically classified basing on standard sedimentologic description of reservoir rock; there are primary and secondary porosity.

How do you find the porosity of a reservoir?

Porosity is calculated as the pore volume of the rock divided by its bulk volume. In Eq. (1.2), f = porosity; Vp = pore volume; and VB = bulk volume.

Can porosity of soil be greater than 100?

Porosity is always less than 100\% but the void ratio may be less than 1 or greater than or equal to 1.

What is the maximum value of porosity?

The theoretical effects of grain size and packing on porosity were investigated by Graton and Fraser who computed the porosity of various packing arrangements of uniform spheres. The theoretical maximum porosity for a cubic packed rock, regardless of the value assigned to grain radius, is 47.6\%.

Why is effective porosity less than total porosity?

Effective porosity is typically less than total porosity. In the original definition of core analysts, the volume of connected pores in a unit volume of rock. The definition is based on the analysis of shaly formations, in which the clay-bound water is considered immobile and hence ineffective.

Can degree of saturation be greater than 1?

Soil is saturated when moisture is present in the void of soil. when there is no moisture content then soil is in dry condition. But as we know when soil is fully saturated then the degree of saturation Sr=1 or 100\%. But in case partially saturated soil the degree of saturation is less than 90\%.

Which increases the porosity?

As little as 1\% air entrainment in the shielding gas will cause distributed porosity and greater than 1.5\% results in gross surface breaking pores. Leaks in the gas line, too high a gas flow rate, draughts and excessive turbulence in the weld pool are frequent causes of porosity.

What is the difference between original and secondary porosity?

Some reservoirs have distinct primary and secondary porosity. Primary porosity is the original porosity of the rock when it formed, and secondary porosity is the pore space created by subsequent processes such as fracturing. The behavior of naturally fractured reservoirs.