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A drilling report published yesterday said the well had experienced operational problems which caused some delays.
"These problems have now been overcome and the well is currently drilling ahead in the Neocomian formation, the principal target for this well. Current depth is 3,201 metres and total depth is now likely to be approximately 3,400 metres," said Bounty's managing director, Tom Fontaine.
A further announcement will be made once total depth has been achieved and the well has been logged.
The Nyuni prospect may hold recoverable reserves of up to 260 million barrels of oil (mmbo) or if gas is present, 870 billion cubic feet (bcf).
Nyuni-1 is the first of two sequential wells being drilled on the Nyuni offshore licence and operating from small islands. The second well, Okuza-1, will test a separate but adjacent structure and will be drilled from Okuza Island.
