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This is an innovative study that deals with the application of continuous wavelet transform (CWT)-based seismic spectrum decomposition (SD) and static wedge modelling (SWM) to characterize the fluvial system of Indus Basin, Pakistan. The CWT better discriminates the thin and thick-bedded hydrocarbon-bearing reservoir pore-fluids compared to band-limited seismic characteristics. The hydrocarbon-bearing point bar shows higher amplitudes compared to the water-filled channel, which indicates lower amplitudes A static amalgamation of CWT attributes within the sandstone reservoirs indicates that 28 Hz can resolve the thick-bedded sandstone-filled point bar facies. The mapping of reservoir facies within the 27 Hz to 40 Hz CWT-based frequencies predicts the lateral distribution of channel sandstone, fluvial point bars, regional faults, and three-dimensional seal of shale-bearing levee deposits. The 48 Hz amplitudes can be used for predicting the regional seal for petroleum system. The SWM resolves a 25 m thick gas-bearing fluvial point bar, which is laterally distributed by head-to-head continuity of 29 km. The SWM can be used to predict the quantitative aspects of fluvial systems. The paleo-flow direction of the river was predicted in NNE-SSW orientations. The low-velocity of ∼3500 m/s of river flow eroded the coarse-grained sandstone facies from the eastern flanks and deposited in the western regions of the Basin. The angle of stratigraphic trap and thickness of point bar petroleum system was 20° and 25 m in the west of Basin. These observations can serve as an analogue for the development of stratigraphic plays within the Indus Basins of Pakistan and fluvial systems with similar geological settings.