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→Water saturation
===Water saturation===
===Water saturation===
The [[water saturation]] (S<sub>w</sub>) within the net pay interval is typically estimated from well logs. Water saturations can also be derived from [[capillary pressure]] testing of cores to determine the relationship of water saturation versus height above the [[Fluid contacts|oil-water contact]]. Like porosity, the water saturation data in an individual well within the net pay interval can be averaged arithmetically and posted on a map for contouring ([[:file:subsurface-maps_fig5.png|Figure 5]]). The averages should be weighted by porosity.
The [[water saturation]] (S<sub>w</sub>) within the net pay interval is typically estimated from well logs. Water saturations can also be derived from [[capillary pressure]] testing of cores to determine the relationship of water saturation versus height above the [http://www.glossary.oilfield.slb.com/en/Terms.aspx?LookIn=term%20name&filter=oil-water%20contact oil-water contact]. Like porosity, the water saturation data in an individual well within the net pay interval can be averaged arithmetically and posted on a map for contouring ([[:file:subsurface-maps_fig5.png|Figure 5]]). The averages should be weighted by porosity.
===Oil saturation===
===Oil saturation===