Production EngineeringWell Performance
Recommended Underbalanced Perforation Pressure Formula
Recommended Underbalanced Perforation Pressure calculates recommended underbalance pressure for well performance workflows in production engineering.
How engineers use this formula
Use this formula when the listed inputs (k) 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, p_u equals 499.056826 psi.
kmD
100
Inputs
k
mDFormation Permeability
Outputs
p_u
psi
Recommended Underbalance Pressure
k
mD
Formation Permeability
Source and review
reviewedBell, W.T., Sukup, R.A. and Tariq, S.M. 1995. Perforating. Henry L. Doherty Memorial Fund of AIME, Society of Petroleum Engineers, Page 74.
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