The change in pressure (pressure gradient) of a fluid column per unit of true vertical depth.
Normal hydrostatic pressure gradient of popular petroleum fluids at Standard Conditions
| Fluid | Normal density range | Pressure Gradient range | ||
|---|---|---|---|---|
| g/cc | (psi/ft) | |||
| Natural Gas | 0.007 – 0.30 | 0.003 – 1.130 | ||
| Gas Condensate | 0.200 – 0.40 | 0.090 – 0.174 | ||
| Oil | 0.400 – 1.12 | 0.174 – 0.486 | ||
| Water | 1.000 – 1.15 | 0.433 – 0.500 | ||
See Also
Petroleum Industry / Upstream / Petroleum Engineering / Subsurface E&P Disciplines / Reservoir Engineering