Posted on 12 December 2012.
By John Lee.
WesternZagros Resources has announced that it and the operator, Talisman, are preparing to complete the Kurdamir-2 well after successfully finishing an additional cased-hole test in the Oligocene Formation (DST#7).
The test was conducted over a 24 metres thick interval between depths of 2,528 metres and 2,552 metres. It achieved a stabilized flow rate of 2,184 barrels per day (“bbl/d”) of light, 42 degree API oil, together with 10.4 million cubic feet per day (“mmcf/d”) of natural gas.
The gas to oil ratio likely indicates a partial contribution from the gas cap due to free gas drawdown through natural fractures in the reservoir. The 3.5 inch tubing size used to conduct this test, together with the unanticipated gas contribution from the gas cap, restricted the oil flow from the reservoir.
As a result, the Operator and WesternZagros have agreed that further tests of shallower zones in the Oligocene reservoir are unnecessary and are now working together on plans to realize the maximum oil production potential from the Oligocene reservoir in Kurdamir-2, potentially through an extended well test subject to the approval of the Kurdistan Regional Government.
Simon Hatfield (pictured), WesternZagros’s Chief Executive Officer commented:
“This second cased hole test in the Oligocene further reinforces our view that Kurdamir is a giant discovery. The results of the entire Oligocene testing program have exceeded our expectations for both thickness of oil column and reservoir quality.
“It is apparent that the intervals tested have excellent permeability and, with optimally designed well completions to isolate the gas cap, are expected to yield oil production rates far in excess of the currently constrained rates.
“The results continue to support our belief that the Oligocene has the potential to hold over a billion barrels of recoverable oil. We are excited about our next appraisal well in the Kurdamir structure at Kurdamir-3. Kurdamir-3 will spud as soon as possible in the new year.“
This most recent cased-hole test was conducted over a perforated interval of 24 metres thick in fractured carbonates in the main porous zone of the Oligocene reservoir. The flow rates of 2,184 bbl/d of light oil and 10.4 mmcf/d of natural gas were recorded after flowing and stabilizing the well for three days at progressively larger choke sizes.