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→Effective porosity
===Effective porosity===
===Effective porosity===
''Oven-dried core analysis porosity'' includes the void space of all interconnected pores plus the volume of water bound to smectite. In contrast, ''humidity-dried core analysis porosity'' includes the void space of all interconnected pores plus the volume of all bound water in excess of the volume of a film of water, two molecules thick, retained by smectite. Keelan<ref name=pt05r92 />) reported that removal of this film may increase porosity 3.3 porosity points in rocks containing 10% smectite.
''Oven-dried core analysis porosity'' includes the void space of all interconnected pores plus the volume of water bound to smectite. In contrast, ''humidity-dried core analysis porosity'' includes the void space of all interconnected pores plus the volume of all bound water in excess of the volume of a film of water, two molecules thick, retained by smectite. Keelan<ref name=pt05r92 /> reported that removal of this film may increase porosity 3.3 porosity points in rocks containing 10% smectite.
==Pore types==
==Pore types==