Cooper Energy Plans Production Test at Bunian-3 Development Well in Sumatra

Australia's Cooper Energy Limited announced Tuesday that the Bunian-3 development well in the Sukananti KSO in South Sumatra, Indonesia is currently making preparations to side-track at 3,461 feet (1,055 meters) after having reached a total depth of 5,590 feet (1,704 meters) in the Talang Akar Formation. Hole conditions have precluded the running of wireline logs and production casing in the original borehole.

The primary target TRM-3 sand was intersected 49 feet (15 meters) higher than the adjacent Bunian-1 oil producing well. 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.

In addition to the successful appraisal of the producing TRM-3 sand, two additional reservoirs, the TRM-1/2 and K1 sands, were also intersected high to Bunian-1 and are potentially hydrocarbon saturated.

It is intended that the well will be completed with the drilling rig and that production testing will be conducted once the 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.

Cooper Energy Managing Director David Maxwell said “The results to date are at the high end of expectations and give strong encouragement for future development activity within the Sukananti permit. The impact on production and reserves will be assessed as new test data is obtained.”


Bunian-3 is an onshore vertical 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.

Joint Venture participants in the KSO Tangai-Sukananti Block are Cooper Energy Ltd (Operator 55 percent) and Mega Adhyaksa Pratama Sukananti Ltd (45 percent).


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