Geology Shale Gouge Ratio Sgr Calculator
Declared SGRsum shale fraction×actual faulted interval thickness/faultthrow. Complete actual displaced stratigraphy required; no assume sealing, pore pressure or a hydrocarbon column.
Description
Shale gouge ratio estimates a shale contribution across an independently accounted fault interval.
Shale gouge ratio estimates a shale contribution across an independently accounted fault interval.1
It does not independently establish fault sealing or permeability. Use this tool to calculate the stated observation or conditional model from supplied measurements.
When to use Geology Shale Gouge Ratio Sgr Calculator
Use this tool to calculate the stated observation or conditional model from supplied measurements. Establish the sample and coordinate basis, matching units, calibration source and applicable model assumptions.
How to use Geology Shale Gouge Ratio Sgr Calculator and understand its results
- Establish the sample and coordinate basis, matching units, calibration source and applicable model assumptions.
- Enter actualFaultedIntervalThicknessesMeters, independentlyAssessedIntervalShaleFractions, actualFaultThrowMeters, using the field meanings and rules below, then run the tool.
- Read result.conditionalShaleGougeRatioPercent. Interpret each field using the units, signs and evidence rules below.
- If input validation fails, correct the reported field and run again. Before applying a successful result, check the stated reference scope, units, assumptions and any retained unknown evidence.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualFaultedIntervalThicknessesMeters | Actual faulted interval thicknesses meters | list of number | Required |
| independentlyAssessedIntervalShaleFractions | Independently assessed interval shale fractions | list of number | Required |
| actualFaultThrowMeters | Actual fault throw meters | number | Required |
Require nonempty aligned nonnegative interval thicknesses and shale fractions in 0–1, plus positive fault throw in meters. Summed thickness must be no greater than throw. Sum thickness×shaleFraction, divide by throw and multiply by 100. Disjointness, missing interval composition and fault-seal interpretation remain external.
SGRpercent=100×Σ(intervalThickness_i×shaleFraction_i)/faultThrowMeters Apply the field units and exact ordering, boundary and evidence rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result containing the calculation or selected reference fields below | object |
| result.conditionalShaleGougeRatioPercent | Conditional Shale Gouge Ratio Percent; use the units, sign convention and calculation stated above | number |
{
"input": {
"actualFaultedIntervalThicknessesMeters": [
2,
3
],
"independentlyAssessedIntervalShaleFractions": [
0.5,
1
],
"actualFaultThrowMeters": 10
},
"output": {
"result": {
"conditionalShaleGougeRatioPercent": 40
}
}
}Limitations and assumptions
It does not independently establish fault sealing or permeability. Results depend on the independently established measurement basis and the exact model assumptions above.
Every listed input requires an explicit value. Unexpected fields, incorrect value types, nonfinite numbers and sparse numeric arrays fail validation; tool-specific bounds and alignment rules apply as described above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful calculation that reports a false comparison or retains unknown evidence.
Alternative or Complementary methods
Use Geology Petrophysical Waxman Smits Water Saturation Calculator to examine a related aspect: Waxman–Smits saturation interpretation accounts for an adopted shaly-formation conductivity model.
Use Geology Petrophysical Shaly Sand Simandoux Water Saturation Calculator where its separate inputs and scope apply: Simandoux saturation interpretation requires a declared conductance model and formation inputs.
References
-
Geology Shale Gouge Ratio Sgr Calculator — tool.io
Similar or alternative tools
- Geology Petrophysical Waxman Smits Water Saturation Calculator
Waxman–Smits saturation interpretation accounts for an adopted shaly-formation conductivity model.
- Geology Petrophysical Shaly Sand Simandoux Water Saturation Calculator
Simandoux saturation interpretation requires a declared conductance model and formation inputs.