AI Prediction
Vsh, Porosity, Water Saturation, and Lithology calculation using petrophysical formulas or AI models from the active LAS file.
Vsh Calculation
Active Formula:
IGR = (GRlog − GRmin) / (GRmax − GRmin) → Vsh = IGR (Linear)
| # | GR (API) | IGR | VSH |
|---|
| Click "Calculate Vsh" to compute results. |
Porosity Calculation
Active Formula:
PHIT = (RHOMA − RHOB) / (RHOMA − RHOF) | PHIE = PHIT × (1 − Vsh)
| # | PHIT | PHIE | P10 | P50 | P90 |
|---|
| Click "Calculate Porosity" to compute results. |
Water Saturation Calculation
Archie: Sw = ((a × Rw) / (PHIE^m × Rt))^(1/n)
Indonesia: 1/√Rt = Vsh^(1−Vsh/2)/√Rsh + √(PHIE^m / (a×Rw)) × Sw^(n/2)
| # | RT (Ω·m) | SW | P10 | P50 | P90 | Method |
|---|
| Click "Calculate Saturation" to compute results. |
Permeability Calculation
Timur: K = C × Φb / Swic. Default: K = 8581 × Φ4.4 / Swi2. AI models predict permeability from GR/RHOB/NPHI/DT/RT + AI porosity/saturation context.
| # | PHIT | PHIE | SW | PERM (mD) | Method |
|---|
| Click "Calculate Permeability" to compute results. |
Lithology Identification
Applied rules: Coal (RHOB < 1.80) → Dolomite (RHOB 2.80–2.90, PE≈3.0) → Limestone (RHOB 2.68–2.75, PE≈5.0, NPHI≤0.35) → Shale (VSH > 0.50) → Shaly Sand (VSH 0.30–0.50) → Clean Sandstone (VSH ≤ 0.30, PHIE ≥ 0.10, RHOB 2.55–2.70) → Unknown
| # | Depth (m) | VSH | RHOB (g/cc) | LITHOLOGY |
|---|
| Click "Identify Lithology" to compute results. |
Final Export — All Reservoir Parameters
Download all calculated parameters (Depth, GR, IGR, VSH, PHIT, PHIE, RT, SW, SATURATION_METHOD, LITHOLOGY) in one CSV file.
| Depth | GR | VSH | PHIT | PHIE | RT | SW | PERM | Method | Lithology |
|---|