This article, which has been presented AAPG Annual Conference and Exhibition, New Orleans, Louisiana, April 2010 explains about tectonics of a Tertiary deepwater intra‐arc basin that experienced inversion by thrust faults. Oil seeps along this area may indicate distribution of source rock. The expelled and migrated hydrocarbon could reach in to potential traps and accumulated in reservoirs in these basins. The tectonics and paleogeographic reconstructions of this basin are expected to reveal the characteristics of petroleum systems.