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Midale water saturation and pore geometry (view source)
Revision as of 20:25, 4 September 2014
, 20:25, 4 September 2014→Buckles plot
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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 [[Wikipedia:Mesoporous material|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>.