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4 in-depth references

Rock Properties Calculators

Use 4 in-depth rock properties petroleum engineering calculators with formulas, inputs, outputs, units, source references, and engineering guidance.

Rock-property calculations support porosity, density, sonic, neutron, gamma-ray, photoelectric, wettability, and core-log interpretation checks.

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PetrophysicsRock Properties

Brooks-Corey Drainage Capillary Pressure

Pc=PeSe−1/λ,0<Se≤1P_c=P_e S_e^{-1/\lambda},\quad 0<S_e\leq1
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PetrophysicsRock Properties

Gassmann Saturated Rock Bulk Modulus

Ksat=Kd+αB2ϕ/Kf+(αB−ϕ)/KsαB=1−Kd/Ks\begin{aligned}K_{\mathrm{sat}}&=K_d+\frac{\alpha_B^2}{\phi/K_f+(\alpha_B-\phi)/K_s}\\\alpha_B&=1-K_d/K_s\end{aligned}
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PetrophysicsRock Properties

Sonic Porosity Raymer-Hunt-Gardner Method

Φsonic=CRHGΔt−ΔtmaΔt\Phi_{sonic}=C_{RHG}\frac{\Delta t-\Delta t_{ma}}{\Delta t}
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PetrophysicsRock Properties

van Genuchten Capillary Pressure

Pc=P0(Se−1/m−1)1−mn=1/(1−m)\begin{aligned}P_c&=P_0(S_e^{-1/m}-1)^{1-m}\\n&=1/(1-m)\end{aligned}
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