ABSTRACT
Porosity is important in petroleum work because it is the space in reservoirs in which the water, gas, and hydrocarbons are found. In sedimentary mineral deposits, the porosity is the space through which the mineralizing solutions move. Permeability is the ability of fluids to move through the rock (or other) material. Permeability implies porosity and bears a relationship to porosity. On the other hand, porosity can exist in substantial amounts without permeability. Saturation is the relative amount of fluid within the interconnected pore space. It is a measure of the relative amount of water, hydrocarbon, and other fluids in the pore space. Saturation implies porosity. Note that saturation is a fraction of the pore space. Tortuosity describes the shape of the interconnected pore space. It is important in the measurement of resistivity and affects the permeability. Tortuosity implies porosity.
