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| isbn = 0-89181-602-X
| isbn = 0-89181-602-X
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Absolute [[permeability]] (K<sub>a</sub>) is the property of a rock that characterizes the flow of fluid through its interconnected pores. It is a measure of the fluid conductivity of a rock. The permeability of a flow unit in a reservoir is not an absolute value but is a relative value that varies with water saturation (''see'' “Relative [[Permeability]] and Pore Type” following). Understanding the methodology for permeability measurements is important for understanding how to assess reservoir rock quality or to compare the quality of one flow unit to another.
Absolute [[permeability]] (K<sub>a</sub>) is the property of a rock that characterizes the flow of fluid through its interconnected pores. It is a measure of the fluid conductivity of a rock. The permeability of a flow unit in a reservoir is not an absolute value but is a relative value that varies with water saturation (see [[Relative permeability and pore type]]). Understanding the methodology for permeability measurements is important for understanding how to assess reservoir rock quality or to compare the quality of one flow unit to another.
==Horizontal and vertical k<sub>a</sub>==
==Horizontal and vertical k<sub>a</sub>==
==See also==
==See also==
* [[Pore–fluid interaction]]
* [[Pore-fluid interaction]]
* [[Hydrocarbon expulsion, migration, and accumulation]]
* [[Hydrocarbon expulsion, migration, and accumulation]]
* [[Characterizing rock quality]]
* [[Characterizing rock quality]]