Waples-Ramly Single-Point Bottom-Hole Temperature Correction Formula
Waples-Ramly Single-Point Bottom-Hole Temperature Correction calculates corrected bottom-hole temperature for thermal gradients workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (T_0, T_mes, TSC, z) are known and the assumptions behind the cited thermal gradients 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_corr equals 102.714797 degC.
10
80
10
2500
Inputs
T_0
degCUndisturbed Ground or Surface Temperature
T_mes
degCMeasured Bottom-Hole Temperature
TSC
hrTime Since End of Mud Circulation
z
mMeasurement Depth
Outputs
T_corr
Corrected Bottom-Hole Temperature
f_wr
Waples-Ramly Correction Factor
T_0
Undisturbed Ground or Surface Temperature
T_mes
Measured Bottom-Hole Temperature
TSC
Time Since End of Mud Circulation
z
Measurement Depth
Source and review
reviewedWaples, D.W. and Mahadir Ramly, M. 2001. A statistical method for correcting log-derived temperatures; formula reproduced in Geothermal Energy case study.
Source