Rawlins-Schellhardt Deliverability Coefficient from Test Point Formula
Rawlins-Schellhardt Deliverability Coefficient from Test Point calculates rawlins-schellhardt deliverability coefficient for inflow performance workflows in production engineering.
How engineers use this formula
Use this formula when the listed inputs (q_g, delta_p2, n_rs) 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, C_rs equals 0.0003 MSCF/day/psi^(2n).
87.2095956720053
6750000
0.8
Inputs
q_g
MSCF/dayGas Flow Rate
delta_p2
psi^2Pressure-Squared Drawdown
n_rs
dimensionlessRawlins-Schellhardt Deliverability Exponent
Outputs
C_rs
Rawlins-Schellhardt Deliverability Coefficient
q_g
Gas Flow Rate
delta_p2
Pressure-Squared Drawdown
n_rs
Rawlins-Schellhardt Deliverability Exponent
Source and review
reviewedScienceDirect Topics. Gas Deliverability, backpressure deliverability coefficient relationship.
Source