Gamma ray log was of a well drilled in an oil zone is shown in Figure 2. The pressure of the reservoir is above the bubble point. This sandstone formation is shaly and has the following characteristics:

Rw = 0.05 ohm-m

Rshb = 2.5 ohm-m (SHALE BED)

Rt = 5 ohm-m

je = 0.18

Estimate the oil saturation at the following depth

a. 400 ft

b. 650 ft

c. 704 ft

d. 1000 ft

What were your observations with the values of the oil saturation?