I think they wanted to mimic B-2 which had 5 potential zones.Balay 1 was shallow and I believe went trhough Barco and mirador.B-1 was a funny one as they reported 1400b/d yet there was a report in UpstreamOil(?) I think was the name that reported potential for 15,000 b/d. from a petrobras source so who knows??!!