Successful Integration Of Subsurface Disciplines Leading To New Oil Discovery: A Case Study From A Balingian Oil Field, Offshore Sarawak, Malaysia

The recent drilling campaign in 2017, undertaken by ROC Oil in partnership with Petronas and Dialog, was to appraise hydrocarbon potential in two new fault blocks and to maximize oil production from current producing fault blocks in a small satellite field in the Balingian basin, offshore Sarawak. Multiple well target optimizations and revisions had taken place prior to and even during the drilling campaign, in response to the results and technical challenges encountered. All the wells in the drilling campaign encountered new oil-bearing sands in the deeper C2C reservoir including re-classified oil in one drilled fault block, previously interpreted as a gas reservoir, based on the open-hole sampling data acquired from one of the appraisal wells in 1982. The successful integration of the subsurface disciplines has led to a significant increase in STOIIP and reserves for the field.