Abstract：Taking the highstand system tract of the first member of Shahejie Group of Nanpu Structure 5 as the main target,this paper discusses lithological exploration strategy in mid-deep layers of Nanpu Structure 5. First based on strata sedimentary evolution simulation,paleo-geomorphologic restoration,provenance analysis,and multi-attribute combination reservoir prediction,a "trench sand control" mode is built. Ancient trench positions and internal filling characteristics were defined. Then with the sedimentary evolution modeling,the distribution of sand-rich areas is determined,and sandbodies are identified by seismic inversion. The main control factors of hydrocarbon accumulation are optimized,and favorable exploration targets are selected. Successful applications of the proposed strategy in Nanpu Structure 5 have great significance for minor sandbody identification in fan delta depositional systems of complex continental rift basins.
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