Australia's Cooper Energy Limited reported Monday that Bunian-4, an oil appraisal/development well, was spud in the KSO Tangai-Sukananti Block, South Sumatra, Indonesia at 3:30 pm Indonesian local time, July 25. At 06:00 this morning, 20 inch surface casing had been run and cemented at 167 feet (51 meters) and preparations were being made to drill ahead in 17.5 inch hole.
Bunian-4 is an onshore directional well with a prognosed total depth of 5,617 feet (1,712 meters) and is forecast to take approximately 26 days to complete, inclusive of production testing.
The Bunian structure is a four-way, fault bounded anticline defined by the 2011 Sukananti 3D seismic survey.
The primary target is the Talang Akar Formation TRM-3 Sand, which is expected to be intersected 1,476 feet (450 meters) east-southeast of the same reservoir in Bunian-3. The target is 1,247 feet (380 meters) south-south east of the surface location and the well will be deviated at 25 degrees to reach its intended objective. The well is expected to add an oil production take point and pressure data obtained will assist in further appraising the size of the oil accumulation.
The TRM-3 Sand is currently producing at approximately 650 barrels of oil per day (bopd) from Bunian-1 and Bunian-3 and has cumulatively produced just over 1 million barrels of oil from the Bunian-1 well. The flow rates are limited by transport capacity constraints; on test in Bunian-3 the zone produced at a stabilized 1,742 bopd.
The secondary objectives of the well are to appraise the extent of the oil pool discovered in the K1 Sand in Bunian-3 ST2 which flowed at 1,590 bopd on test and to assess the TRM-1 and TRM-2 Sands which it was not possible to evaluate in the earlier well.
Joint Venture participants in the Tangai-Sukananti KSO are:
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