Porosity & Permeability Flashcards
0
Q
Primary porosity:
A
Voids created by grains as rocks formed.
1
Q
Porosity is the
A
Amount of water that can be held in a rock.
2
Q
Secondary porosity:
A
Voids/cracks created after formation.
3
Q
Porosity equation:
A
Porosity = Vp/Vtot x 100
Vp = volume of void space. Vtot = total volume of rock.
4
Q
Permeability is
A
Ease at which water can pass through a porous rock.
5
Q
Not all water in porous rocks is able to move freely from one place to another -
A
A rock may have high porosity but low permeability,
Eg pumice and clay.
