2 in-depth references

Petrophysics Calculators

Use 2 in-depth petrophysics petroleum engineering calculators with formulas, units, default calculations, source references, assumptions, and limitations.

Petrophysics calculators support porosity, saturation, resistivity, formation factor, shale correction, SP-log, nuclear-log, and core-log interpretation workflows.

Calculators

Free

No sign-in

Sources

Cited

PetrophysicsResistivity Logs

Indonesian Water Saturation from Shaly Sand Logs

S_w=\left[\frac{\sqrt{1/R_t}}{\frac{V_{sh}^{1-0.5V_{sh}}}{\sqrt{R_{sh}}}+\sqrt{\frac{\phi_e^m}{aR_w}}}\right]^{2/n}

Open calculator

PetrophysicsResistivity Logs

Archie Water Saturation from Resistivity Logs

S_w = \left[\left(\frac{a}{\phi^m}\right)\left(\frac{R_w}{R_t}\right)\right]^{1/n}

Open calculator