Petroleum Productivity Index PI Calculator
Actualsingle-phasequalifiedsteadyPI q/(pr−pw),matchedvolumebasis/units,not HornerfitPIor skin/productionforecast.
Description
Productivity index relates an observed steady flow rate to its pressure drawdown.
Productivity index relates an observed steady flow rate to its pressure drawdown.1
Rate volume basis and pressure units must match the independently assessed reservoir and bottomhole conditions.
When to use Petroleum Productivity Index PI Calculator
Use this tool to apply the stated petroleum productivity index pi calculator operation with an explicit input and unit basis.
How to use Petroleum Productivity Index PI Calculator and how it works
- Establish the measurement basis and units described above.
- Enter actualSteadyOilVolumeRate, actualIndependentReservoirMinusBottomholePressure and run the tool.
- Read result.value using the output meanings below.
- If input is rejected, correct the stated type, range, ordering or alignment issue and rerun; review successful results under the declared convention.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualSteadyOilVolumeRate | Steady oil volume rate, on the basis specified in the algorithm. | number | required; finite; nonnegative; further conditions in the algorithm |
| actualIndependentReservoirMinusBottomholePressure | Independent reservoir minus bottomhole pressure, on the basis specified in the algorithm. | number | required; finite; strictly positive; further conditions in the algorithm |
Require nonnegative steady oil rate and positive reservoir-minus-bottomhole pressure. Divide rate by drawdown on the caller's stated unit basis.
PI = q / (p_reservoir − p_bottomhole) Apply the declared units, ordering and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the declared output fields. | object |
| result.value | Productivity index in supplied flow-rate units per pressure unit. | number |
{
"input": {
"actualSteadyOilVolumeRate": 10,
"actualIndependentReservoirMinusBottomholePressure": 2
},
"output": {
"result": {
"value": 5
}
}
}Limitations and assumptions
The output applies the declared operation to the values you supply. Establish the measurement basis, units, coefficients and any caller-selected rules before interpreting it. The tool does not independently collect or verify observations or decide whether a model or reference applies.
Supply explicit required fields with the documented types and dense aligned arrays. Unknown fields, wrong types and nonfinite numbers are rejected. Branch-specific constraints are explained above. A successful false boolean, negative signed difference, empty slice or unresolved tie is distinct from an input error. Very large inputs or outputs may be rejected by shared resource limits.
Alternative or Complementary methods
For a related operation, use Petroleum Well Test Radius Of Investigation Calculator. A well-test investigation-radius reference depends on flow regime, storage, geometry and the chosen interpretation criterion.
For a related operation, use Petroleum Flow Efficiency Calculator. Flow efficiency compares observed well productivity with an independently established undamaged reference.
References
Similar or alternative tools
- Petroleum Well Test Radius Of Investigation Calculator
A well-test investigation-radius reference depends on flow regime, storage, geometry and the chosen interpretation criterion.
- Petroleum Flow Efficiency Calculator
Flow efficiency compares observed well productivity with an independently established undamaged reference.