Interpretasi well logging 1. Batubara Nilai log natural gamma 0 15 cps Nilai log formation density 1.2 1.6 gr/cc Nilai log high resolution density > log bad resolution

2. Sandstone Nilai log natural gamma 15 35 cps Nilai log density > 1.6 gr/cc Nilai log high resolution < bed resolution

3. Muddy sandstone Log natural gamma 35 60 cps Log density > 1.6 gr/cc High resolution < bed resolution

4. Mudstone Log natural gamma 60 120 cps Log density > 1.6 gr/cc High resolution < bed resolution