Publications

Sequence stratigraphic framework in the giant Senoro Field was established by integrating advanced well logs and seismic dataset – have revealed the influence of complex tectonism that controlled greater Senoro carbonate platform evolution due to its vicinity with active collision margin front of Batui Thrust. Previously, it was postulated that Senoro Field is separated into the North and South structural areas as reflected by inexplicable differences of reservoir lithofacies and properties between Mantawa Member and Minahaki Formation that represents each area.

Sequence stratigraphy interpretation resolves stacking pattern of the Salodik Group which starts with deposition of basal Tomori sequence low-energy carbonate platform and shoaling-upward sequence of Matindok Shale to Lower Minahaki sequence carbonate-ramp and capped by regional transgressive Tight Streak zone. Transtensional tectonic regime-controlled deposition during Upper Minahaki sequence that separated border-fault controlled synformal depression filled by deeper water carbonate ramp with uplifted blocks where shallow water carbonate banks develops. The Poh Beds marks clear demarcation between Minahaki and Mantawa Mbr. that signify episode of renewed collision and syn-inversion deposition. Inversion tectonic accentuated newly formed structural bulges in North structural area where the Mantawa build-ups grow, while transpressional regime develop in South structural area forming 3-way dip faulted anticline.

Key structural feature that characterizes Senoro carbonate platform in active collision margin is saddle zone may actually act as structural fulcrum during carbonate platform evolution that allows further progradation of shallow water carbonate platform clinoforms from the North area towards the South structural area. This concept explains strong connectivity between the North and South structural areas as proven by 2024 drilling campaign in the Southern structural area, revealing certain range of pressure depletion despite previously unproduced and separated 7 km away.