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Line 75:
Line 75: + − − [[FIGURE 29.]] The decrease in water saturation with height controls the producing behavior of an oil column. Redrawn from Jennings, 1987, with permission from the AAPG.
→The static distribution of fluids in unproduced reservoirs
==The static distribution of fluids in unproduced reservoirs==
==The static distribution of fluids in unproduced reservoirs==
[[File:M91FG29.JPG|thumb|300px|{{figure number|29}}The decrease in water saturation with height controls the producing behavior of an oil column. Redrawn from Jennings, 1987, with permission from the AAPG.]]
The producing behavior in an oil column will vary according to the fluid saturations (Jennings, 1987). Several zones can be defined (Figure 29):
The producing behavior in an oil column will vary according to the fluid saturations (Jennings, 1987). Several zones can be defined (Figure 29):
# ''The zone of 100% oil production.'' This is located above the height where the water saturation is less than the relative permeability end point to water, e.g., less than 20% water saturation. The water is immobile and only oil will flow.
# ''The zone of 100% oil production.'' This is located above the height where the water saturation is less than the relative permeability end point to water, e.g., less than 20% water saturation. The water is immobile and only oil will flow.