Petroleum Original Gas In Place OGIP Calculator
Inventory independently verified nonoverlapping gas reservoir patches A h φ(1−Sw)/B into stock volume, all m²/m/m³ conventions explicit; no reserves, geology continuity or single homogeneous patch assumption. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.
Description
Original in-place stock volume can be estimated by summing independently delineated reservoir patches.
Original in-place stock volume can be estimated by summing independently delineated reservoir patches.1
This gas calculator uses area, net thickness, porosity, water saturation, and a matched formation-volume factor for each nonoverlapping patch.
When to use Petroleum Original Gas In Place OGIP 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 Original Gas In Place OGIP 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 observedGasPatchAreasM2, observedGasNetThicknessM, observedGasPorosityFractions, observedGasWaterSaturationFractions, callerMatchedGasFormationVolumeFactors, following the field table and calculation rules below, then run the tool.
- Read callerVolumetricOriginalStockM3. 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 |
|---|---|---|---|
| observedGasPatchAreasM2 | Observed gas patch areas m2 | list of number | Required |
| observedGasNetThicknessM | Observed gas net thickness m | list of number | Required |
| observedGasPorosityFractions | Observed gas porosity fractions | list of number | Required |
| observedGasWaterSaturationFractions | Observed gas water saturation fractions | list of number | Required |
| callerMatchedGasFormationVolumeFactors | Caller matched gas formation volume factors | list of number | Required |
Require nonempty aligned positive areas in m², thicknesses in metres, and formation-volume factors, with porosity and water saturation in [0,1]. Sum A h φ(1−Sw)/B over patches. Zero hydrocarbon pore fraction yields zero contribution; nonoverlap, geology, and the stock/reference conditions are supplied assumptions.
originalStockM3=ΣA_i h_i φ_i(1−Sw_i)/B_i Read these symbols with the field meanings and branch or reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| callerVolumetricOriginalStockM3 | Caller volumetric original stock m3 | number |
{
"input": {
"observedGasPatchAreasM2": [
1,
2
],
"observedGasNetThicknessM": [
2,
3
],
"observedGasPorosityFractions": [
0.5,
0.5
],
"observedGasWaterSaturationFractions": [
0.2,
0.4
],
"callerMatchedGasFormationVolumeFactors": [
2,
3
]
},
"output": {
"callerVolumetricOriginalStockM3": 1
}
}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 Original Oil In Place OOIP Calculator: Original in-place stock volume can be estimated by summing independently delineated reservoir patches. This oil calculator uses area, net thickness, porosity, water saturation, and a matched formation-volume factor for each nonoverlapping patch. For a complementary step, use Petroleum Recovery Factor Gas Calculator: Observed gas recovery compares cumulative stock production with an independently established original inventory. This audit also reconciles a separate remaining inventory, keeping ratios above one and signed discrepancies visible.
References
Similar or alternative tools
- Petroleum Original Oil In Place OOIP Calculator
Original in-place stock volume can be estimated by summing independently delineated reservoir patches. This oil calculator uses area, net thickness, porosity, water saturation, and a matched formation-volume factor for each nonoverlapping patch.
- Petroleum Recovery Factor Gas Calculator
Observed gas recovery compares cumulative stock production with an independently established original inventory. This audit also reconciles a separate remaining inventory, keeping ratios above one and signed discrepancies visible.