Time-average relation in compacted formations (porosity/transit time relationships)
Input(s)
\(\delta\) t: Total Travel Time \((\mu \mathrm{s} / \mathrm{ft})\)
\(\delta \mathrm{t}_{\mathrm{f}}\): Travel Time in Liquid/Fluid \((\mu \mathrm{s} / \mathrm{ft})\)
\(\delta \mathrm{t}_{\mathrm{ma}}\): Travel Time in Matrix \((\mu \mathrm{s} / \mathrm{ft})\)
Output(s)
Ø: Porosity (fraction)
Formula(s)
\[
\varnothing=\frac{\delta t-\delta t_{m a}}{\delta t_{f}-\delta t_{m a}}
\]
Reference(s)
Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 3, Page: 54.