Drilling EngineeringWell Control
Workover Kill Fluid Weight from Shut-In Tubing Pressure Formula
Workover Kill Fluid Weight from Shut-In Tubing Pressure calculates kill fluid weight for well control workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (SITP, TVD_perf, OFW) are known and the assumptions behind the cited well control 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, KFW equals 11.484615 ppg.
SITPpsi
1200
TVD_perfft
8000
OFWppg
8.6
Inputs
SITP
psiShut-In Tubing Pressure
TVD_perf
ftTop Perforations True Vertical Depth
OFW
ppgOriginal Fluid Weight
Outputs
KFW
ppg
Kill Fluid Weight
SITP
psi
Shut-In Tubing Pressure
TVD_perf
ft
Top Perforations True Vertical Depth
OFW
ppg
Original Fluid Weight
Source and review
reviewedIADC WellSharp Formula Sheet, field units, well completion/workover formula sheet.
Source