Calculate the porosity and lithology of the Polar No$.1$ drilled in Lake

Maracaibo. The depth of interest is $13,743$ feet. A density log and a sonic

log were run in the well in addition to the standard Induction Electric

Survey $($IES$)$ survey.

The readings at $13,743$ feet are:

bulk density $=2\mathrm{.}522g\frac{m}{c}c$

travel time $=62\mathrm{.}73m-s\frac{ec}{ft}$