By OGJ editors
HOUSTON, Sept. 17 -- Gran Tierra Energy Inc., Calgary, reported a stabilized flow rate of 2,324 b/d of 43.8° gravity oil on a production test of Cretaceous Lower Palmar Largo volcanics and volcaniclastics at the Proa.x-1 exploration well on the Surubi block in northern Argentina's Noroeste basin.
The well, tested at 12,649-661 ft and 12,620-641 ft on a 35/64-in. choke, was drilled to total depth of 12,920 ft measured depth. Water cut was 0.5%. A drillstem test in the same formation at 12,694-713 ft yielded no flow.
The company, operator with 85% working interest in the 90,688-acre block, plans to begin a long-term test within a week through a 3½-in., 15-mile, 4,000 b/d pipeline to Gran Tierra-operated Chivil field on the adjacent Chivil block. Recursos Energeticos Formosa SA (REFSA), the provincial government company, has 15% interest.
Gran Tierra, which carried REFSA's drilling costs, will be reimbursed for all costs incurred during drilling from 50% of the net production assigned to REFSA. Provincial royalties on production range from 12% for up to 4.7 million bbl of cumulative production to 14% on 4.7 million to 9.4 million bbl to 16% for further production.
Gran Tierra said the well's results improve the prospectivity of identified leads in the Surubi block and in the adjoining Chivil and Palmar Largo blocks, where the company has 100% and 14% working interest, respectively.
