The new exploration well within the Tendrara project area is the first of three. It is targeting the A1 prospect, which is located some 19 kilometres from the Tendrara production concession area.
TE-9 will be drilled down to 3,022 metres. It will test two targets, one is the primary TAGI reservoir and the other is the underlying Paleozoic.
The programme is expected to take between 35 and 45 days.
Sound plans to update investors at a number points during the period, and, it has set up a webcam so that progress can be monitored online.
Shares were up 3.8% to 37.4p on Thursday afternoon.
--Updates for share price--