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The Tenggol Arch is a gentle Pre-Tertiary structural high that separates the Cenozoic Malay and Penyu Basins. The Tenggol Arch is a relatively underexplored part of offshore Peninsular Malaysia. In 2011 Lundin Malaysia became operator of a PSC covering the Tenggol Arch and acquired a regional scale dual sensor (GeoStreamer) 3D seismic survey covering approximately 2100 square km. This survey is the first dual sensor 3D seismic survey carried out in Malaysia. The 3D reveals unexpected details of both the pre-Tertiary basement geology and Tertiary sedimentology in unprecedented detail. In 2012 Lundin Malaysia used the Tenggol 3D to discover the first potentially commercial hydrocarbons in this part of the tenggol Arch.