Jadestone Energy also has a 100% operated working interest in the Block 46/07 PSC, adjacent to the Block 51 PSC.  The Nam Du discovery is located within Block 46-07 on the north-eastern margin of the Malay-Tho Chu Basin in a water depth of 48 metres.

The Nam Du Channel 22 reservoir is a fluvial channel of Lower Miocene age.  It is approximately 20 metres thick and has two thin coal intervals.  Wireline logs show a coarsening-upwards sequence with the upper 10-15 metres appearing to be cleaner and a higher porosity interval.