TGS has finished reprocessing a 2D seismic survey offshore northern Sumatra, Indonesia, tying discoveries in the region to open acreage.
The 7,756-line-km 2D reprocessing work, which employed a modern broadband pre-stack processing workflow, covers the Sumatra Basin’s Miocene-Oligocene syn-rift clastic and carbonate plays.
Coverage is now extended outboard and inboard from the existing North Sumatra 3D project, which includes the Pase sub-basin of the North Sumatra Basin.
Recent large offshore gas discoveries such as Timpan-1, Layaran-1 and the latest Tangkulo-1 are all covered by the 3D dataset, providing well calibration points.
According to TGS, the combined 2D and 3D data should improve understanding of both existing discoveries and shelfal wells along the basin’s southern and eastern margin.
Proven plays include Miocene carbonates, Miocene/Pliocene clastics and the Oligocene syn-rift. In addition, the dataset has imaged an untested older syn-rift play.
GeoStreamer technology has delivered good resolution at all depths, TGS added, from overburden to deeper basement structures, shedding light on the basin’s development history and the deeper plays.
Final depth-migrated deliverables are available for both the 3D and 2D datasets.
