Ann: Mbelele-1 preliminary results point toward Helium Discovery, page-52

Next Investors were also on GGE.

GGE declared a discovery on Apr 24 with about 1% helium but had only 30,000 or 30mcf/day of raw gas flow which equates to only 0.3mcf/day of helium at their project in Utah. At US450/mcf for helium that's bugger all revenue with that flow rate. Still trying to get a decent flow-rate GGE. Air Products nearby them in the US at 0.4% helium had well(s) upto 20mmcf or 20,000mcf/day of raw gas so about 80mcf/d of helium from such a high flowing well.

So the helium concentration is important but also the flow-rate as @petere is alluding to maybe NHE will get a decent flow-rate but time will tell.