...
where
| Water formation volume factorRelative oil mobility |
| Oil formation volume factor |
|
| ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Relative water mobility |
| Relative oil mobilityWater formation volume factor |
| Current formation pressure | ||||||||||||||||
| Water densityCross-sectional flow area |
| Oil densityTotal sandface flowrate |
| Standard gravity constantDeviation of flow from horizontal plane | ||||||||||||||||
| Total sandface flowrate Water density |
| Cross-sectional flow areaOil density |
| Deviation of flow from horizontal planeStandard gravity constant |
It provides a good estimate when the drawdown is much higher than delta pressure from gravity and capillary effects.
...