BC Petroleum Berhad, which has been incorporated to manage the Balai Cluster risk service contract, had completed and perforated a 6m interval to access a net pay section of 9.4m.
It was from this interval that the flow was achieved on a 40/64-inch choke, with oil coming out at 30 degrees API.
The well has now been shut in prior to the arrival of an early production vessel to conduct extended production testing over remaining reservoirs.
Roc said a total of 14 reservoirs had been identified from logging, with a total estimated hydrocarbon pay in excess of 100m.
Formal rig operations have now concluded, with the rig to move onto the Balai field, about 25km east of the Bentara field.
The Balai Cluster consists of four fields: Bentara, Balai, Spaoh and West Acis.
ROC has a 48% stake in the joint venture, with Dialog Group which has 32% and Petronas holding a 20% interest.