Separator Gas Capacity at Standard Conditions Formula
Separator Gas Capacity at Standard Conditions calculates gas capacity at standard conditions for well performance workflows in production engineering.
How engineers use this formula
Use this formula when the listed inputs (K_s, d, F_g, z, P, P_s, T, T_s, rho_l, rho_g) are known and the assumptions behind the cited well performance relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, q_s equals 50,624,861.2409 ft3/d.
0.35
4
0.75
0.9
800
14.7
600
520
0.75
0.06
Inputs
K_s
ft/sSeparator Coefficient
d
ftTotal Internal Diameter of Separator
F_g
fractionFraction of Total Area Available to Gas
z
dimensionlessGas Compressibility Factor
P
psiSeparation Pressure
P_s
psiBase Pressure
T
KAbsolute Separation Temperature
T_s
KBase Temperature
rho_l
g/cm3Liquid Density
rho_g
g/cm3Gas Density
Outputs
q_s
Gas Capacity at Standard Conditions
K_s
Separator Coefficient
d
Total Internal Diameter of Separator
F_g
Fraction of Total Area Available to Gas
Source and review
reviewedGas Conditioning and Processing, Campbell, J. M. (1992)
John M. Campbell. 1992. Gas Conditioning and Processing, Campbell Petroleum Series, Vol. 2, Page 74.
Source