Colombia: Llanos Balay discovery confirmed

By OGJ editors
HOUSTON, May 10
– Petroleo Brasileiro SA has confirmed its 2010 Balay oil discovery in Colombia’s Llanos basin and plans more delineation drilling in 2011.

The Balay-2 ST1 appraisal well yielded 2,620 b/d of 26° gravity oil with 9.3% BS&W that is probably completion fluid from two perforated intervals in the Upper Mirador on an electric submersible pump, said Petroamerica Oil Corp., Calgary. Petroamerica has a 15% participating interest in the Balay block.

The well also defined a deeper oil-down-to level in the Upper Mirador reservoir. Additionally, 145 bbl of 13° gravity oil and water 10-16% BS&W was recovered from the Barco Formation. No hydrocarbons were recovered from tests carried out in the Une and Gacheta reservoirs.

The Balay-1 discovery well has been on long-term production test since July 14, 2010, producing more than 285,000 bbl of 28° gravity oil from Upper Mirador with 0.22% BS&W. The forward plan is to put Balay-2 ST1 on long-term test with Balay-1. Balay-3 is to be drilled in the fourth quarter of 2011 to appraise Balay’s northern extent.

Petrobras operates Balay with 45% participating interest. CEPSA Colombia SA has 30%, and Sorgenia has 10%.



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