Amerisur Resources said on Monday it had spudded Calao-1X exploration well on the CPO-5 block.
Calao-1X was spudded on 1 February, and was the second well to be drilled from the Indico pad to determine the prospectivity of the lower sands formation around the Indico discovery the company said.
Calao-1X would be a directional well, with a planned total measured depth of approximately 11,940 feet, targeting a structure alongside Indico to the southwest, towards the Aguila structure, the company said.
'Following the positive result from Indico-1, we are delighted to report the spudding of Calao-1X from the Indico pad to determine the size of the play,' the company said.
Amerisur held a 30% non-operated interest in the CPO-5 block which is 70% owned and operated by ONGC Videsh.
A further announcement would be made in due course once the well had been drilled and logged, the company said.
At 9:19am: (LON:AMER) Amerisur Resources PLC share price was +0.34p at 16.96p