Karoon Gas Australia Ltd., Melbourne, has found multiple oil-bearing reservoirs in its Kangaroo-2 appraisal well in the Santos basin offshore Brazil.
Karoon says it has recovered oil from five separate zones, intersecting a 250-m gross oil column and 135 m of net reservoir pay.
However, the well did not intersect the anticipated gas cap and there were shallower-than-expected oil-water contacts in some of the sands.
The impact of these results is being studied to determine their effects on the contingent resource values for the Kangaroo discovery.
In more detail, Karoon said the Palaeocene sections contained 90 m of gross oil-bearing reservoir with three separate oil columns, while the Maastrichtian section contained two oil-bearing zones totalling 160 m in thickness.
Kangaroo-1, drilled in January 2013, found a 76-m oil column (OGJ Online, Jan. 24, 2014). Kangaroo-2 was drilled 290 m updip from the discovery.
Karoon has made a wide estimate of potential reserves for the Kangaroo structure of 7-487 million bbl. The company hopes for a more definite estimate following wireline logging and production testing in the second well. There may also be a decision to side-track the well.
Work in 2015 will include the drilling of Kangaroo West-1 on the same salt structure and trap type as Kangaroo-2. Another two contingent wells are included in the rig contract.
Karoon holds a 65% interest and operatorship in the Kangaroo block with Pacific Rubiales Energy holding the reminaing 35%.
