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  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

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[[Porosity]] consists of relatively large voids, or pores, distributed among smaller passages called pore throats. A pore system is an aggregate of pores and pore throats that shares a similar morphology. These elements play a role in determining reservoir and seal petrophysics (the characteristic way that oil, gas, and water move through rocks). [[:file:predicting-reservoir-system-quality-and-performance_fig9-9.png|Figure 1]] shows typical 3-D pore system geometries found in intergranular, intercrystalline, vuggy, or fractured rocks.

[[Porosity]] consists of relatively large voids, or pores, distributed among smaller passages called pore throats. A pore system is an aggregate of pores and pore throats that shares a similar morphology. These elements play a role in determining [[reservoir]] and [[seal]] petrophysics (the characteristic way that oil, gas, and water move through rocks). [[:file:predicting-reservoir-system-quality-and-performance_fig9-9.png|Figure 1]] shows typical 3-D pore system geometries found in intergranular, intercrystalline, vuggy, or fractured rocks.

[[file:predicting-reservoir-system-quality-and-performance_fig9-9.png|left|300px|thumb|{{figure number|1}}. Copyright: Coalson et al., 1994; courtesy RMAG.]]

[[file:predicting-reservoir-system-quality-and-performance_fig9-9.png|left|300px|thumb|{{figure number|1}}. Copyright: Coalson et al., 1994; courtesy RMAG.]]

==Critical elements of pore-system geometry==

==Critical elements of pore-system geometry==

The pores of a rock occur between grains or crystals, in fractures, or in vugs. A rock's storage capacity is controlled by the size and number of pores. A rock's [[permeability]] (flow capacity) is controlled by the size, shape, and number of the pore throats (connections) per pore. Four critical elements of the geometry of a rock's pore system are

The pores of a rock occur between grains or crystals, in fractures, or in [http://www.merriam-webster.com/dictionary/vug vugs]. A rock's storage capacity is controlled by the size and number of pores. A rock's [[permeability]] (flow capacity) is controlled by the size, shape, and number of the pore throats (connections) per pore. Four critical elements of the geometry of a rock's pore system are

* Pore system shapes

* Pore system shapes