Separator Gas Capacity at Standard Conditions Calculator
Enter the required inputs, confirm the units, and run the calculator to solve q_s. Review the formula source and assumptions before using the result in engineering work.
Calculation context and source notes
Separator Gas Capacity at Standard Conditions calculates gas capacity at standard conditions for well performance workflows in production engineering. The page keeps the declared variables, units, source relationship, and output definition visible for technical review.
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.
Solves for
q_s (ft3/d)
Best next page
Formula, variables, and sourceFormula, variables, and default calculation
Reproducible default result
With the default values shown below, the calculation returns q_s = 50,624,861.2409 ft3/d. Defaults demonstrate the implementation; they are not recommended field values.
0.35
4
0.75
0.9
800
14.7
600
520
0.75
0.06
Input definitions
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
Output definitions
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
Engineering use, assumptions, and limits
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.
Frequently asked questions
What inputs does the Separator Gas Capacity at Standard Conditions calculator need?
The calculation uses Separator Coefficient (K_s), Total Internal Diameter of Separator (d), Fraction of Total Area Available to Gas (F_g), Gas Compressibility Factor (z), Separation Pressure (P), Base Pressure (P_s), Absolute Separation Temperature (T), Base Temperature (T_s), Liquid Density (rho_l), Gas Density (rho_g). Enter values on the units shown beside each field.
What result does this calculator return?
The primary result is gas capacity at standard conditions in ft3/d. The formula section shows the declared relationship, variables, and a reproducible default calculation.
What should I check before using the result?
Confirm the unit basis, source applicability, and input quality. The calculation does not replace a full engineering model or operating procedure. Mixing unit systems without converting the inputs.
Source and record status
Source metadata identifies the relationship implemented by the calculator. Check the cited edition, unit basis, and scope against the engineering case before operational use.
Gas Conditioning and Processing, Campbell, J. M. (1992)
John M. Campbell. 1992. Gas Conditioning and Processing, Campbell Petroleum Series, Vol. 2, Page 74.
Open source reference