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Line 44: − + + + + − − [[file:predicting-reservoir-system-quality-and-performance_fig9-25.png|thumb|{{figure number|9-25}}See text for explanation.]]
What is permeability? (view source)
Revision as of 22:08, 24 February 2014
, 22:08, 24 February 2014→Example
==Example==
==Example==
In the photos below, flow unit 1 is a sucrosic dolomite. On a face of a plug of flow unit 1, a very large number of very small pore throats (capillaries) occur, resulting in a measurable flow (Q). That Q, at a measured cross-sectional area A of the plug, yields a K<sub>a</sub> of approximately 20 md.
[[file:predicting-reservoir-system-quality-and-performance_fig9-25.png|thumb|{{figure number|2}}See text for explanation.]]
In [[:file:predicting-reservoir-system-quality-and-performance_fig9-25.png|Figure 2]], flow unit 1 is a sucrosic dolomite. On a face of a plug of flow unit 1, a very large number of very small pore throats (capillaries) occur, resulting in a measurable flow (Q). That Q, at a measured cross-sectional area A of the plug, yields a K<sub>a</sub> of approximately 20 md.
The sample from flow unit 2 with the same A has fewer, larger pore throats (capillaries) exposed in the face of the plug. If the Q for flow unit 2 is slightly lower than flow unit 1, then the K<sub>a</sub> will be lower (by using the same A).
The sample from flow unit 2 with the same A has fewer, larger pore throats (capillaries) exposed in the face of the plug. If the Q for flow unit 2 is slightly lower than flow unit 1, then the K<sub>a</sub> will be lower (by using the same A).
Flow unit 1 has a [[porosity]] of 30%, and flow unit 2 has a porosity of 10%. The variance in porosity becomes the indicator of the contrast in pore throat size when converted to port size. For flow unit 1, the port size is approximately 1.1μ; for flow unit 2, port size is approximately 3μ.
Flow unit 1 has a [[porosity]] of 30%, and flow unit 2 has a porosity of 10%. The variance in porosity becomes the indicator of the contrast in pore throat size when converted to port size. For flow unit 1, the port size is approximately 1.1μ; for flow unit 2, port size is approximately 3μ.
==See also==
==See also==