Raymer hunt transform (porosity/transit time relationship)

Input(s)

ø: Porosity (fraction)

$\Delta t_{m a}$: Travel Time in Matrix $(\mu \mathrm{s} / \mathrm{ft})$

$\Delta t_{f}$: Travel Time in Liquid/fluid $(\mu \mathrm{s} / \mathrm{ft})$

Output(s)

$\Delta \mathrm{t}$: Total Travel Time $(\mu \mathrm{s} / \mathrm{ft})$

Formula(s)

$$ \Delta t=\left(\frac{(1-\phi)^{2}}{\Delta t_{m a}}+\left(\frac{\phi}{\Delta t_{f}}\right)\right)^{-1} $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 3, Page: 56.