Drilling EngineeringWell Control
Kill Weight Mud Determination - Moore Equation Formula
Kill Weight Mud Determination - Moore Equation calculates kill weight mud for well control workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (SIDPP, OMW, TVD) 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, KWM equals 12.961538 ppg.
SIDPPpsi
500
OMWppg
12
TVDft
10000
Inputs
SIDPP
psiShut-In Drill Pipe Pressure
OMW
ppgOriginal Mud Weight
TVD
ftTrue Vertical Depth
Outputs
KWM
ppg
Kill Weight Mud
SIDPP
psi
Shut-In Drill Pipe Pressure
OMW
ppg
Original Mud Weight
TVD
ft
True Vertical Depth
Source and review
reviewedLapeyrouse, N.J. 2002. Formulas and Calculations for Drilling, Production and Workover, 2nd Edition, Page 131.
Source