Since the Cameia discovery in 2012 confirmed the presence of an expansive pre-salt hydrocarbon reservoir in the deepwater offshore Angola, there has been a continuing flow of finds at this level in the country. The latest of these, new field wildcat Golfinho 1 in Block 20/11, was announced by Cobalt after drilling completed in June this year. It followed on from the Zalophus 1 NFW, also drilled by the SSV Catarina earlier in the year, which discovered gas and condensate in 44m net pay in the pre-salt on the same block. Sonangol estimates in-place resources to be 813 MMboe, 313 MMbc and 2.8 Tcfg.
Golfinho, thought to be an oil discovery, lies on the southern part of Block 20/11, about 70 km south of Zalophus and along trend with Cameia, in about 1,700m of water. Cobalt say that early analysis of the Golfinho well results indicates potential for another large mound feature with similar fluid and reservoir properties to Cameia, which is a very large 4-way dip closure in an Aptian carbonate reservoir, located immediately below the base of the salt.
Cobalt has drilled eight NFWs over Block 20/11 and Block 21/09 since 2012, making seven discoveries, an 88% success rate, and estimates it has discovered about 1.3 Bb of gross resources in these blocks offshore Angola.
With the drilling of Golfinho, the company has met its work commitments under the current PSC. The company had been looking to farm-out its 40% stake in the blocks to Sonangol P&P, but this transaction terminated in August and Cobalt is now looking for new interested parties. Equity in Block 20/11 is split between operator Cobalt (40%), BP (30%) and Sonangol P&P (30%).