Publications

Exploration success in offshore Jatibarang Sub-basin over the past several decades has been mixed, with the focus on exploring proximal to the rift-bounding faults but limited attention to the other significant basin’s elements. Little consideration has been given to temporal changes in source basin variability and the role of secondary faulting in sediment routing. This study is a broader investigation of these aforementioned issues using extensive database: 22 wells, 710ft core, palynology-biostratigraphy data and 2D-3D seismic to understand the relationship between structural evolution and sediment distribution in the basin with a goal to impact future opportunities in this and other strike-slip associated rift basins. Core analysis indicates that depositional environments include river systems, alluvial fans, fan deltas and shelf lacustrine systems. Six stratigraphic sequences are established, furthermore divided into genetic sequence sets and the resultant framework used to understand accommodation changes. Regional stresses controlled the development of secondary splay faults which influenced the migration of lacustrine source-rock depocenters, first in the Early Oligocene, followed by second movement of depocenters in the Late Oligocene. In addition, secondary splay faults form major sediment linkages between the sediment sourcing areas of the rift-bounding faults to the north and the sediment sinks forming to the south. Results of this study reveal: (1) there is strong link between strike-slip secondary fault splays and sedimentation pathways, because of this genetic relationship, we see (2) development of alluvial fans and fan deltas distributed spatially and continuously proximal to basin’s border fault, (3) major sediment entrance points are developed where border faults link with secondary fault splays. (4) Secondary faults confine braided fluvial systems (BFS) to their downthrown block resulting in BFS extending basinward in trends paralleling these splays, (5) deep basin sinks migrate in association with development of secondary splay faults and are dominated by subaqueous fan deposition.