Llanos wildcat making 10,440 b/d of light oil

By OGJ editors
HOUSTON, Jan. 5
-- Petrominerales Ltd., Bogota, said its Yatay-1 exploratory well on the Guatiquia block in Colombia’s Llanos basin is making 10,440 b/d of 43° gravity oil on natural flow from the Lower Sand 3 formation.

Logs at Yatay-1 indicate 114 ft of potential net oil pay in the Lower Sand-3 formation and 17 ft of potential net oil pay in the Guadalupe formation.

An electrical submersible pump was installed in the well after perforating a 10-ft section at the top of the Lower Sand-3 formation. Over the last 17 hr the well has produced on natural flow through a 1-in. choke, at a rate of 10,440 b/d with less than a 0.1% water cut.

The company is evaluating the potential for additional Yatay follow-up locations incorporating the well results and recently completed Guatiquia 3D seismic survey. Yatay-1 is the first well into a new, seismically defined structure downdip from the Candelilla structure and across the bounding Candelilla fault. The Candelilla structure produced more than 7.3 million bbl of light oil in 2010 from the Lower Sand-3 and Guadalupe formations.

The rig will move to the Candelilla-5 location targeting the Guadalupe formation that is currently producing in Candelilla-4. Meanwhile, the Cardenal-1 and Celeste-1 wells are drilling since early December 2010 on the Corcel block, and results are due by late January.

Meanwhile, Petrominerales’ Borugo-1 exploratory well on the Rio Ariari heavy oil block in the Llanos basin is cased for tests after logs indicated 35 ft of potential net oil pay in the Mirador formation. Total depth si 5,260 ft.

Borugo is testing a play concept distinct from the company’s Mochelo-1 and Rio Ariari-1 discovery wells.



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