Production EngineeringWell Performance
Wellstream Volumetric Flow Rate from Weight Flow Formula
Wellstream Volumetric Flow Rate from Weight Flow calculates actual wellstream volumetric flow rate for well performance workflows in production engineering.
How engineers use this formula
Use this formula when the listed inputs (W, rho_m) 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_v equals 1.122773 ft3/s.
Wlb/hr
46482.8
rho_mlb/ft3
11.5
Inputs
W
lb/hrTotal Liquid Plus Vapor Weight Flow Rate
rho_m
lb/ft3Gas-Liquid Mixture Density
Outputs
q_v
ft3/s
Actual Wellstream Volumetric Flow Rate
W
lb/hr
Total Liquid Plus Vapor Weight Flow Rate
rho_m
lb/ft3
Gas-Liquid Mixture Density
Source and review
reviewedAPI RP 14E Appendix A flowline example converts total wellstream weight flow divided by mixture density into flowing volume rate.
SourceRelated formulas and calculators
Effective Wellbore Radius of a Well in Presence of Uniform Flux Fractures
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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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