Petroleum Leak Off Test Pressure Calculator
Audit already observed leak-off surface readings translated with independent shoe hydrostatic/gauge calibration, not pressure testing instructions or fracture strength inferred from a curve. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.
Description
A completed leak-off test’s surface reading differs from a shoe-level pressure by gauge offset and hydrostatic contribution.
A completed leak-off test’s surface reading differs from a shoe-level pressure by gauge offset and hydrostatic contribution.1
This audit applies independently supplied corrections to observations already taken, without identifying leak-off from a trace.
When to use Petroleum Leak Off Test Pressure Calculator
Use this tool when you need to calculate the stated measurement summary or conditional model from matched observations. Prepare completed matched measurements, SI or explicitly stated oilfield units, and independent evidence for the selected branch or calibration.
How to use Petroleum Leak Off Test Pressure Calculator and understand its results
- Prepare completed matched measurements, SI or explicitly stated oilfield units, and independent evidence for the selected branch or calibration.
- Enter observedAlreadyCompletedLeakOffSurfacePa, observedIndependentShoeHydrostaticPa, observedIndependentGaugeOffsetsPa, following the field table and calculation rules below, then run the tool.
- Read observedGaugeCorrectedShoeLeakOffPa. For result objects, inspect the nested output fields below, including any missing evidence or selected indices.
- Correct any input issues and run again. Before using a successful result, review its units, signs, evidence coverage, and stated model or reference assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedAlreadyCompletedLeakOffSurfacePa | Observed already completed leak off surface pa; pressure or stress in pascals, with the sign convention described above. | list of number | Required |
| observedIndependentShoeHydrostaticPa | Observed independent shoe hydrostatic pa; pressure or stress in pascals, with the sign convention described above. | list of number | Required |
| observedIndependentGaugeOffsetsPa | Observed independent gauge offsets pa; pressure or stress in pascals, with the sign convention described above. | list of number | Required |
Require nonempty aligned nonnegative completed surface readings and hydrostatic pressures, plus finite signed gauge offsets. Return surface minus offset plus hydrostatic for every row; signed corrected results are retained.
shoePa=surfacePa−gaugeOffsetPa+hydrostaticPa Read these symbols with the field meanings and branch or reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedGaugeCorrectedShoeLeakOffPa | Observed gauge corrected shoe leak off pa; pressure or stress in pascals, with the sign convention described above. | list of number |
{
"input": {
"observedAlreadyCompletedLeakOffSurfacePa": [
10,
20
],
"observedIndependentShoeHydrostaticPa": [
30,
40
],
"observedIndependentGaugeOffsetsPa": [
1,
2
]
},
"output": {
"observedGaugeCorrectedShoeLeakOffPa": [
39,
58
]
}
}Limitations and assumptions
Measurements, unit conventions, branch identity, and model applicability must be independently established. The result does not infer a complete reservoir or flow model, operational settings, or a reserve classification.
Missing required fields, unknown fields, wrong types, and violated calculation rules return input issues. Numeric values must be finite; nonfinite numeric outputs are rejected. Arrays must be dense, with no missing cells. Numeric lists allow at most 10000 entries, subject to smaller tool-specific bounds above.
Alternative or Complementary methods
For a related task, use Petroleum Nozzle Pressure Drop Calculator: A measured bit pressure differential can include losses outside the nozzle contribution. This audit subtracts an independently measured non-nozzle loss from upstream-minus-downstream pressure and retains signed residuals. For a complementary step, use Petroleum Fracture Pressure Calculator: A fracture indicator recorded during a completed pressure test can cross an independently chosen criterion more than once. This tool reports all crossings of supplied measurements without establishing a safe pressure or prescribing a test.
References
Similar or alternative tools
- Petroleum Nozzle Pressure Drop Calculator
A measured bit pressure differential can include losses outside the nozzle contribution. This audit subtracts an independently measured non-nozzle loss from upstream-minus-downstream pressure and retains signed residuals.
- Petroleum Fracture Pressure Calculator
A fracture indicator recorded during a completed pressure test can cross an independently chosen criterion more than once. This tool reports all crossings of supplied measurements without establishing a safe pressure or prescribing a test.