Cooper Energy Provides Update on Drilling in Indonesia, Australia

Cooper Energy Limited revealed Wednesday that the second sidetrack of the Bunian-3 development well in the Sukananti KSO in South Sumatra, Indonesia has reached a total depth of 5,242 feet (1,598 meters) and preparations to run production casing are underway. Wellbore conditions have precluded running open hole wireline logs and the well will be evaluated through casing.

As reported in the previous Update Announcement March 24, potential hydrocarbon bearing zones were identified in the Bunian-3 side-track 1 well. In that near vertical borehole, the primary target TRM-3 sand was intersected approximately 52 feet (16 meters) higher than in the adjacent Bunian-1 oil producing well. The deeper secondary target in the K1 sand was intersected approximately 36 feet (11 meters) higher than in Bunian-1.

Side-track 2 was deviated away from the vertical wellbore and confirmed the presence of the target reservoirs updip of side-track 1. This outcome may yield additional production and reserves increments. There is also potential pay in the TRM-1/2 sands.

Bunian-1 was drilled in 1998 and initially tested at 1,585 barrels of oil per day. Bunian-1 has produced 993,000 barrels of oil and is currently producing at 191 barrels of oil per day.

It is intended that Bunian-3 will be completed after casing and logging and that production testing will be conducted once the drilling rig has been released. The production performance of the additional sands will be evaluated as part of the testing program.

On completion of Bunian-3, the rig will move to drill the Tangai-5 development well.


Bunian-3 is an onshore well in the Sukananti KSO, South Sumatra, Indonesia. The Bunian structure is a four-way, fault bounded anticline defined by the 2011 Sukananti 3D seismic survey. Bunian-3 is located 2,395 feet (730 meters) southwest of Bunian-1 and the primary target is the Talang Akar Formation TRM-3 Sand.


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