In a statement the oil and gas junior said the key well has been drilled through the Upper Miocene conglomerates and reached a casing point at 1,389 metres.
It is now about 210 metres from the appraisal well’s first objective, Sound said.
The progress report is likely to be a comfort for investors as the well has already been side-tracked because the drill pipe became stuck in the Upper Miocene conglomerates at around 1,087 metres.
Nervesa is a key priority for Sound. The gas field is thought to contain about 21bn cubic feet of gas, it has been valued at US$60mln and initial cash flows are estimated at US$20mln per year.