Colombia: Heavy oil tested from Rumiyaco

Alange Energy Corp., Toronto, will appraise and may horizontally drill an unexpected heavy oil accumulation in the Cretaceous Lower Rumiyaco formation at the Topoyaco-2 exploratory well on the 60,034-acre Topoyaco block in Colombia’s Putumayo basin.

By OGJ editors
HOUSTON, Dec. 16
– Alange Energy Corp., Toronto, will appraise and may horizontally drill an unexpected heavy oil accumulation in the Cretaceous Lower Rumiyaco formation at the Topoyaco-2 exploratory well on the 60,034-acre Topoyaco block in Colombia’s Putumayo basin.

A zone at 7,532-7,624 ft that appears to be the Rumiyaco tested at 310 b/d of 10.5° gravity oil with 20% basic sediment and water on an electric submersible pump. Rumiyaco has 48 ft of net pay. TD is 8,700 ft.

The company will drill a new well to the deeper Villeta and Caballos, the intended targets in Topoyaco-2. Overall, Topoyaco-2 cut 114 ft of net pay sand and 125 ft of oil-saturated carbonates.

The definitive stratigraphic model will have to be validated by a thorough geological evaluation to encompass correlations with blocks to the south and northeast, Alange Energy said.

The company will start drilling Prospect D, the block’s most important objective, late in the 2011 first quarter targeting the subthrust.

Topoyaco-1 on Prospect B penetrated the whole sedimentary column of interest, reaching the Saldana formation in the Paleozoic. Alange Energy, operator with 50% working interest, plans to run an ESP to start production testing in the next week. Pacific Rubiales Energy Corp. has the other 50%.

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