Jones-Blount-Glaze Gas Deliverability Rate Formula
Jones-Blount-Glaze Gas Deliverability Rate calculates gas flow rate for inflow performance workflows in production engineering.
How engineers use this formula
Use this formula when the listed inputs (P_r, P_wf, a_jbg, b_jbg) are known and the assumptions behind the cited inflow 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_g equals 110.555128 MSCF/day.
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Inputs
P_r
psiaAverage Reservoir Pressure
P_wf
psiaFlowing Bottom-Hole Pressure
a_jbg
psi^2/(MSCF/day)Laminar Deliverability Coefficient
b_jbg
psi^2/(MSCF/day)^2Turbulent Deliverability Coefficient
Outputs
q_g
Gas Flow Rate
delta_p2
Pressure-Squared Drawdown
P_r
Average Reservoir Pressure
P_wf
Flowing Bottom-Hole Pressure
a_jbg
Laminar Deliverability Coefficient
b_jbg
Turbulent Deliverability Coefficient
Source and review
reviewedJones, Blount, and Glaze gas-well deliverability relationship with Darcy and non-Darcy terms.
Source