Production EngineeringWell Performance
Single-Phase Liquid Flow Through Choke Formula
Single-Phase Liquid Flow Through Choke calculates liquid flow rate for well performance workflows in production engineering.
How engineers use this formula
Use this formula when the listed inputs (C_d, A_choke, g_c, DeltaP, rho) 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 equals 0.469563 ft^3/s.
C_ddimensionless
0.8
A_chokeft^2
0.00136353847812057
g_clbm*ft/lbf/s^2
32.17
DeltaPlbf/ft^2
144000
rholbm/ft^3
50
Inputs
C_d
dimensionlessChoke Discharge Coefficient
A_choke
ft^2Choke Flow Area
g_c
lbm*ft/lbf/s^2Unit Conversion Factor
DeltaP
lbf/ft^2Pressure Drop Across Choke
rho
lbm/ft^3Liquid Density
Outputs
q
ft^3/s
Liquid Flow Rate
DeltaP
lbf/ft^2
Pressure Drop Across Choke
A_choke
ft^2
Choke Flow Area
C_d
dimensionless
Choke Discharge Coefficient
rho
lbm/ft^3
Liquid Density
Source and review
reviewedGuo, B., Lyons, W.C., and Ghalambor, A. Petroleum Production Engineering: A Computer-Assisted Approach, Page 5.
SourceRelated formulas and calculators
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Effective Wellbore Radius of a Horizontal Well – Method 1 (Anisotropic Reservoirs)
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Effective Wellbore Radius of a Horizontal Well – van der Vlis et al. Method
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