Publications

The Greater Makassar Strait in this study covers the northern and southern Makassar Basins, including the onshore portion of Western Sulawesi. Compared with the western part of the North Makassar Basin (e.g. Kutai Basin), the area discussed in this study has not yet been established as a petroleum province. The Kutai Basin, a major petroleum province, has a long history of hydrocarbon production. The Paleogene interval, though less explored due to its deeper subsurface position, presents significant exploration potential. This study examines the Paleogene potential of the Greater Makassar Strait. Limited discoveries have been made within the Palaeogene interval in this region. Mature Paleogene source rocks in the onshore area are evident in the Tanjung Field of the Barito Basin and Kerendan Field in the Upper Kutai Basin. The Ruby Field in the offshore South Makassar Basin is further evidence of a Paleogene source rock.

Subcommercial hydrocarbon occurrences and shows have been encountered in the Eocene-Oligocene carbonate reservoirs of Sultan-1, including Kaluku-1, at the clastic section. Despite several unsuccessful exploration wells, these data points collectively provide valuable insights for reevaluating the petroleum system in the area. Data accessibility and quality are significant challenges in achieving a comprehensive understanding of the regional geology and petroleum systems. This study leverages MDR data, which encompasses 2D and 3D seismic data from various vintages and well information. By integrating these results with those of previous studies, including the most recent evaluations, three primary gross depositional environments within the Paleogene interval were delineated. This analysis aims to highlight key play elements, such as the Early to Middle Eocene hydrocarbon source rock interval and the Late Eocene to Oligocene reservoir intervals. This study proposes novel exploration concepts and target areas that warrant further investigation in future exploration campaigns.