Capable of being permeated, or passed through; yielding passage; passable; penetrable; -- used especially of substances which allow the passage of fluids; as, wood is permeable to oil; glass is permeable to light.
This is a measure of how quickly a liquid can flow through a rock. It is an important property to consider e.g. when building a reservoir, when sourcing new oil reserves. Liquid can flow through a rock in two different ways: Through pores or small inter-connected holes (like a sponge) in the rock's structure i.e. it is porous Through joints and cracks in the rock i.e. is it pervious Peak District gritstone has many holes within its structure that allow it to hold water and so is considered to be porous. However if the pores are not well connected then liquid cannot easily flow through the rock and so will not necessarily be highly permeable but more impermeable. Peak District limestone is very jointed and cracked and therefore considered to be pervious.
capable of allowing flow or movement of a liquid such as water through pore spaces (Because of the ease with which liquids may move through the numerous large pore spaces of the sandy Pinelands soils, they are said to be highly permeable.)
measure of a rockâ€™s ability to flow liquids or gases. Highly permeable rocks tend to have many large and well-connected pores. The more permeable the rock, the easier it is to produce oil and gas from the reservoir.