jocam9: PSA is now thinking about drilling one production well for the "G" sand and another well for the shallow sands. Then you could produce from the "G" sand and the shallow sands (sequentially) at the same time. Perhaps the economics of doing this justify four wells rather than two. Will depend of course on what they have found in the upper sands.
Looks like Jocam9 was right in finding "upper sands" pay zone