Production EngineeringWell Performance
Choke Outlet Temperature Formula
Choke Outlet Temperature calculates downstream choke outlet temperature for well performance workflows in production engineering.
How engineers use this formula
Use this formula when the listed inputs (T_u, z_u, z_o, k, P_o, P_u) 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, T_dn equals 587.496244 degR.
T_udegR
620
z_udimensionless
0.92
z_odimensionless
0.9
kdimensionless
1.27
P_opsi
700
P_upsi
1000
Inputs
T_u
degRUpstream Temperature
z_u
dimensionlessUpstream Gas Z-Factor
z_o
dimensionlessOutlet Gas Z-Factor
k
dimensionlessSpecific Heat Ratio
P_o
psiOutlet Pressure
P_u
psiUpstream Pressure at Choke
Outputs
T_dn
degR
Downstream Choke Outlet Temperature
T_u
degR
Upstream Temperature
P_o
psi
Outlet Pressure
P_u
psi
Upstream Pressure at Choke
Source and review
reviewedGuo, B., Lyons, W.C., and Ghalambor, A. Petroleum Production Engineering: A Computer-Assisted Approach, Page 5/62.
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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