What is the total sum of openings or voids that occur within a rock?

What is the total sum of openings or voids that occur within a rock?

• A. Void fraction
• B. Permeability
• C. Porosity
• D. Porousness

Answer: (C)

Porosity is the fraction of a rock's bulk volume that is pore space—the total volume of openings or voids inside the rock relative to its overall volume. This value indicates how much fluid the rock could potentially hold. It’s typically expressed as a decimal or percentage, for example, 0.25 or 25% means a quarter of the rock’s volume is pore space. Permeability, on the other hand, relates to how easily fluids can move through connected pores, which depends on pore connectivity as well as size. The term porousness isn’t a standard technical term in this context. So the total openings inside the rock are described by porosity.

Porosity is the fraction of a rock's bulk volume that is pore space—the total volume of openings or voids inside the rock relative to its overall volume. This value indicates how much fluid the rock could potentially hold. It’s typically expressed as a decimal or percentage, for example, 0.25 or 25% means a quarter of the rock’s volume is pore space. Permeability, on the other hand, relates to how easily fluids can move through connected pores, which depends on pore connectivity as well as size. The term porousness isn’t a standard technical term in this context. So the total openings inside the rock are described by porosity.