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Line 21: − + − [[File:Predicting-reservoir-system-quality-and-performance fig9-102.png|thumbnail|{{figure number|2}}Illustration of mudstones that are (A) meso- to macro-porous (B) amicro- to meso-porous; packstones.]]+ + + − − [[file:predicting-reservoir-system-quality-and-performance_fig9-104.png|thumb|{{figure number|3}}Buckles plot for the Weyburn well. Copyright: Coalson et al., 1994; courtesy RMAG.]]
Midale water saturation and pore geometry (view source)
Revision as of 15:57, 23 May 2014
, 15:57, 23 May 2014→Buckles plot
==Buckles plot==
==Buckles plot==
<gallery mode=packed heights=200px widths=200x>
File:Predicting-reservoir-system-quality-and-performance fig9-102.png|{{figure number|2}}Illustration of mudstones that are (A) meso- to macro-porous (B) amicro- to meso-porous; packstones.
file:predicting-reservoir-system-quality-and-performance_fig9-104.png|{{figure number|3}}Buckles plot for the Weyburn well. Copyright: Coalson et al., 1994; courtesy RMAG.
</gallery>
As shown on [[:File:Predicting-reservoir-system-quality-and-performance fig9-102.png|Figure 2]], mudstones (B) are micro- to mesoporous; packstones (A) are meso- to macroporous. The mudstones have more pores with smaller pore throats than the packstones. This means mudstones have greater pore surface area and higher immobile S<sub>w</sub>. As a consequence, S<sub>w</sub> values for mudstones are higher at any given elevation in the oil column.
As shown on [[:File:Predicting-reservoir-system-quality-and-performance fig9-102.png|Figure 2]], mudstones (B) are micro- to mesoporous; packstones (A) are meso- to macroporous. The mudstones have more pores with smaller pore throats than the packstones. This means mudstones have greater pore surface area and higher immobile S<sub>w</sub>. As a consequence, S<sub>w</sub> values for mudstones are higher at any given elevation in the oil column.
[[:file:predicting-reservoir-system-quality-and-performance_fig9-104.png|Figure 3]] is a Buckles plot for the Weyburn well. The hyperbolic curves represent equal values of S<sub>w</sub> × Φ. Points from the same pore type that fall along a hyperbolic curve are at immobile S<sub>w</sub>. Curves with higher values represent higher immobile S<sub>w</sub>.
[[:file:predicting-reservoir-system-quality-and-performance_fig9-104.png|Figure 3]] is a Buckles plot for the Weyburn well. The hyperbolic curves represent equal values of S<sub>w</sub> × Φ. Points from the same pore type that fall along a hyperbolic curve are at immobile S<sub>w</sub>. Curves with higher values represent higher immobile S<sub>w</sub>.