Ann: Seismic Contract for Phase 2 Exploration at Cabora Bassa, page-22

Can understand the concerns about spending time deepening well into the Lower Angwa at possible expense of a fluid sample from shallower targets. A lower risk plan might be to open up enough of the Upper Angwa to access sufficient reservoir to gather a useful pressure data set and acquire fluid samples. With the samples and pressures in the bag the well could then be deepened into the Lower Angwa.

My analysis is based on limited data. In these situations there are usually lots of factors to consider...eg extra cost of an extra logging job....added length of time upper section is left open due to added logging job etc.