Drilling EngineeringWell Control
Kick Analysis - Formation Pressure With Well Shut-In Formula
Kick Analysis - Formation Pressure With Well Shut-In calculates formation pressure for well control workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (SIDPP, MW, h) 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, P_fp equals 7,040 psi.
SIDPPpsi
800
MWppg
12
hft
10000
Inputs
SIDPP
psiShut-In Drill Pipe Pressure
MW
ppgMud Weight
h
ftHeight or True Vertical Depth
Outputs
P_fp
psi
Formation Pressure
SIDPP
psi
Shut-In Drill Pipe Pressure
MW
ppg
Mud Weight
h
ft
Height or True Vertical Depth
Source and review
reviewedLapeyrouse, N.J. Formulas and Calculations for Drilling, Production and Workover, 2nd Edition, Page 125.
Source