Meyer Gardner Pirson Vertical Well Critical Coning Rate Formula
Meyer Gardner Pirson Vertical Well Critical Coning Rate calculates critical oil rate without water coning for well performance workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (rho_w, rho_o, r_e, r_w, h, h_p, mu_o, B_o, k_o) 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, q_o equals 2.511297 STB/day.
1
0.85
1000
0.328
50
20
2
1.2
100
Inputs
rho_w
g/ccWater Density
rho_o
g/ccOil Density
r_e
ftDrainage Radius
r_w
ftWellbore Radius
h
ftOil Column Thickness
h_p
ftPerforated Interval Thickness
mu_o
cPOil Viscosity
B_o
RB/STBOil Formation Volume Factor
k_o
mDEffective Oil Permeability
Outputs
q_o
Critical Oil Rate without Water Coning
k_o
Effective Oil Permeability
h
Oil Column Thickness
h_p
Perforated Interval Thickness
Source and review
reviewedJoshi, S.D. 1991. Horizontal Well Technology, Meyer-Gardner-Pirson vertical-well critical-rate correlation.
Source