− | 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 oil-water contact (see [[Capillary pressure]]). 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 [[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. |