摘要：The depositional elements in the slope settings of Niger Delta were assessed in this study in order to improve current understanding of their evolution, geometry and formative processes. Well log analysis revealed thick sequences of shale, interbedded with relatively thin hydrocarbon-bearing turbidite sands in the studied interval. Depositional elements delineated include a 32km long submarine incised valley, an erosional channel belt and a leveed channel. Other features identified include scallops, terraces, linear grooves as well as scours of mass-transport deposits (MTDs). It was deduced that the submarine incised valley formed by gradual incision made by erosive turbidity flows and evolved in four post-incision phases. The erosional channel belt was interpreted to have formed by cut-and-fill processes, with no evidence of levees. The leveed channel characterized by low-amplitude channel-axis reflections and brighter levee amplitude signatures indicated the presence of thin sands in the levee areas and fine-grained channel-axis deposits. Fair to good reservoir potential of the fill-deposits were inferred from log responses and seismic amplitude signatures of the sand fill-deposits within the mapped interval. Results from this study show that the identified depositional elements formed from repeated erosive turbidity flows and other mass transport processes.
