Ann: Mukuyu-2 sidetrack Total Depth reached in Lower Angwa, page-569

Hi

The reference to Tscf is to make the distrinction between trillions of cubic feet at standard conditions of temperature and pressure, so the 's' stands for "standard conditions", and when applying "oilfield units" we refer to volumes at 14.696 psia (1 atmosphere) and 60 deg F. Although often people refer to standard conditions at 20 deg C.

When we refer to TCF it should imply "reservoir conditions of temperature and pressure". There is a big difference between Tscf and Tcf because gas expands when it reaches the surface, and a gas expansion factor of at least 200-times reservoir volume usually exists.

In oilfield units mm or MM refers to million or Mega.

I can confirm that I applied both discount factors and risk-factors. The discount factor was 37% (open to debate) and the risk factors applied to prospective resources and contingent resources were 1% and 10% respectively (also open to debate). I also assumed 20% of Mukuyu could be classified as contingent resources following "Discovery" based on samples from M-2ST (and correlating log data from M-1/ M-1ST, which extends over three fault blocks).

I hope this helps.