Basin margin sediment wedge build out of the Eastern Niger Delta: application of shelf-edge trajectory pattern studies

Abstract The understanding of how basin margin sediment wedge builds out causes shelf-edge migration with time is approached based on trajectory pattern analysis using a high-resolution mega-merge seismic data from the eastern Niger Delta, Nigeria. study focuses dip transect traversing Greater Ughelli, Central Swamp, Coastal Swamp and Shallow Offshore Depobelts Delta. On regional transects, sediments occur as clinoform-bearing wedges at immediately updip shelf-slope break. shelf edge deeply buried (> 2–4 s, twt), around Ughelli Swamps. But changing structural style, sudden change ascending was observed. huge listric growth fault in Swamp; Bonny area, once again cut into half, rotated it along distally. Several depositional packages show low to moderate progradational aggradational clinoform that characterized by thin sand sheets across most upper slope, though few are also thick shelf, upper-tolower slope floor. deposition usually Outer Shelf Terrace (OST) which regressive flat rising style. This has demonstrated accommodation flux dominant controls basin’s built out, whereby limited promotes significant advance descending trajectories, while increasing trajectories increased outer shelf. greater than gives more hydrocarbon prospectivity search margin.