Liquid-Liquid Vessel Retention Time Calculator
Enter the required inputs, confirm the units, and run the calculator to solve T_ret. Review the formula source and assumptions before using the result in engineering work.
Calculation context and source notes
Liquid-Liquid Vessel Retention Time calculates retention time 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 (A_sep, mu, gamma_b, gamma_t) are known and the assumptions behind the cited well performance relationship match the engineering case being checked.
Solves for
T_ret (h)
Best next page
Formula, variables, and sourceFormula, variables, and default calculation
Reproducible default result
With the default values shown below, the calculation returns T_ret = 2.4 h. Defaults demonstrate the implementation; they are not recommended field values.
0.2
3
1.05
0.8
Input definitions
A_sep
dimensionlessSeparator Constant
mu
cPViscosity of Predominant Phase
gamma_b
dimensionlessSpecific Gravity of Bottom Phase
gamma_t
dimensionlessSpecific Gravity of Top Phase
Output definitions
T_ret
Retention Time
A_sep
Separator Constant
mu
Viscosity of Predominant Phase
gamma_b
Specific Gravity of Bottom Phase
gamma_t
Specific Gravity of Top Phase
Engineering use, assumptions, and limits
Use this formula when the listed inputs (A_sep, mu, gamma_b, gamma_t) 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 Liquid-Liquid Vessel Retention Time calculator need?
The calculation uses Separator Constant (A_sep), Viscosity of Predominant Phase (mu), Specific Gravity of Bottom Phase (gamma_b), Specific Gravity of Top Phase (gamma_t). Enter values on the units shown beside each field.
What result does this calculator return?
The primary result is retention time in h. 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 87.
Open source reference