What is the relationship between porosity and permeability?
More specifically, porosity of a rock is a measure of its ability to hold a fluid. Mathematically, it is the open space in a rock divided by the total rock volume (solid and space). Permeability is a measure of the ease of flow of a fluid through a porous solid.
Does porosity increase with permeability?
Porosity = (volume of holes in material) / (total volume of material). The porosity of the same material is the same, even if the particle size is different. But permeability is a different thing. It increases as particle size increases.
Does porosity and permeability have direct relationships?
The porosity-permeability relationship is also shown in Figure-7. The increment in porosity enhances the permeability because with increase in number of pores the interconnectivity will also be increased so permeability increases too. …
What is the relationship between porosity and surface area?
For a porous material, or one that has an unsmooth surface, the BET surface area is generally appreciably larger than its non-porous analog. The porosity of pharmaceutical materials can impact processing and manufacturing.
Does high porosity mean high permeability?
Low porosity usually results in low permeability, but high porosity does not necessarily imply high permeability. It is possible to have a highly porous rock with little or no interconnections between pores.
Why is porosity and permeability important?
The porosity and permeability of rocks is important in determining which rocks will make a good reservoir. A rock that is both porous and permeable would make a good reservoir rock as it allows oil and gas to move up through the pores in the rock closer to the surface where it can be extracted.
How porosity and permeability affects an aquifer?
Porosity ultimately affects the amount of water a particular rock type can hold and depends on a couple of different factors. The ability of the ground water to pass through the pore spaces in the rock is described as the rock’s permeability. Permeable layers of rock that store and transport water are called aquifers.
How does porosity and permeability affect groundwater?
Does porosity affect surface area?
The surface area is the internal surface area per unit of pore volume and determines the amount of space in rocks exposed to injectant during injection operation. The results obtained from the experiment indicate that the specific surface area shows an initial decrease upon increasing of porosity up to 0.2.
How does porosity affect adsorption?
Porous metal oxides can be used as granular adsorbents that have a high surface area and hence a high adsorption capacity. For larger particles, the adsorbents having pores larger than 10 nm (FSP and DD6) showed faster adsorption than adsorbents with smaller pores (GEH and CFH).
Does high porosity mean low permeability?
How is permeability determined?
Permeability is a measure of the ease of passage of liquids or gases or specific chemicals through the material. Permeability is determined by applying a head and determining the depth of penetration or the amount of liquid or gas passing through the sample.