The sonic log parameters from an exploratory well in a reservoir are as follows

Q. The sonic log parameters from an exploratory well in a reservoir are as follows: Measured P-wave transit time (∆𝑡𝑙𝑜𝑔) = 85 µs/ft

True resistivity (Rt) = 10 ohm-m Matrix transit time (∆𝑡𝑚𝑎) = 45 µs/ft Fluid transit time (∆𝑡𝑓𝑙) = 205 µs/ft

Formation water resistivity at reservoir temperature (Rw) = 0.1 ohm-m

The hydrocarbon saturation (in percentage) in the reservoir is__________(round off to 1 decimal place).

Ans: 59-61

Using the given eq