API RP 14E Minimum Flow Area per 1000 Barrels Liquid Formula
API RP 14E Minimum Flow Area per 1000 Barrels Liquid calculates minimum flow area per 1000 barrels liquid per day for well performance workflows in production engineering.
How engineers use this formula
Use this formula when the listed inputs (R, T, Z, P, V_e) 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, A_1000 equals 3.150976 in2/(1000 bbl/day).
5882.35294117647
580
0.81
1615
28.523023504926556
Inputs
R
scf/bblGas-Liquid Ratio
T
degROperating Temperature
Z
dimensionlessGas Compressibility Factor
P
psiaOperating Pressure
V_e
ft/sErosional Velocity
Outputs
A_1000
Minimum Flow Area per 1000 Barrels Liquid per Day
V_e
Erosional Velocity
R
Gas-Liquid Ratio
T
Operating Temperature
Z
Gas Compressibility Factor
P
Operating Pressure
Source and review
reviewedReview of the API RP 14E erosional velocity equation, Eq. 3 minimum cross-sectional area form.
Source