Okoro-3 is the first well to be drilled by Afren/Amni on OML 112 in the shallow water Niger Delta. Okoro-3 is a vertical appraisal well on the Okoro Field which was discovered by the Okoro-1 well in 1973. Okoro-1 found oil in two separate Agbada Formation sands between 4,900 and 5,550 feet. The Okoro-3 well was designed to evaluate the eastern extent of the field and acquire the full data suite, in particular fluid samples, which are essential for development planning.
The well commenced on 14th October and was drilled to total depth of 6,500ft in the Miocene Agbada Formation. The well confirmed the eastern extension of the field and also the hydrocarbon contacts seen in both sand formations in the initial discovery. A 30ft interval in the Upper sand was tested and oil samples were taken that have confirmed the well productivity potential and other key reservoir properties.
Flowing tubing head pressures and other Petroleum Engineering data recorded during the test, indicate that estimated production capacity for a completed production well would be in excess of 4,000 barrels of oil per day.
Following completion of testing operations, a second appraisal well will be drilled on the Okoro Field. The well will be drilled as a deviated sidetrack from the Okoro-3 wellbore and is designed to further evaluate both reservoirs and provide greater control for planning future horizontal production wells. The sidetrack program is expected to take approximately 15 days.
The pre-drill range of reserves for the Okoro-Setu development project were 20 mmbbls Proven (P1) and 35 mmbbls Probable (P2) reserves. Initial post well analysis of Okoro-3 results indicates that the revised range of reserves for the Okoro-Setu project is now 35 mmbbls Proven (P1), an increase of 75%, and 40 mmbbls Probable (P2).
Development drilling on both the Okoro and Setu Fields is scheduled to commence in Q3 2007 with the GSF Adriatic VI jackup and field development planning is currently on schedule for first oil in early 2008.
Brian O'Cathain, Chief Executive of Afren, commented
"We are very pleased with the results of this appraisal well on the Okoro Field, which significantly enhances the proved reserves case on the Okoro-Setu development. The successful delineation of Okoro within only six months of Afren reaching agreement with Amni to enter this project demonstrates Afren's technical capability to deliver a challenging program in a compressed time frame. We look forward to working with Amni to deliver production from the Okoro-Setu development in early 2008.
I am delighted with our recent progress, entry into Congo and Angola and together with the successful appraisal results, we remain on track for 15-20,000 bpd by early 2008".
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