Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Geology

Slope channels are considered the main clastic reservoirs in many regions especially the continental slopes all across the world. In some cases. these channels arc stacked together and laterally amalgamated. This paper is about channel geomorphology imaging using different geophysical and geological tools to better define its architecture and fairway delineation. The Nile deposits are assumed to be a type locality for this kind of channels as huge channelized features are imaged in the continental slope of the African plate. Many channels are targeted for hydrocarbon exploration in this area like Sienna channel which lies offshore west Nile Delta and used as a case study in this paper.The Nile Delta gas reservoirs are dominated by Pilo-Pleistocene and Miocene channel deposits, which became nowadays the key player for gas production in Egypt. These channelized features are spectacularly imaged on high-quality seismic data. Workflow started by using seismic attributes like Root Mean Square (RMS) amplitude extraction and Spectral decomposition analysis. These attributes highlighted the channel geometry and its evolutional history through geological times.Pre-stack seismic inversion products: VpiVs ratio and Acoustic impedance. discriminated gas sand. water sand from shale background and this helps to highlight facies association. Depositional cycles are differentiated using gamma-ray log. By integrating all the data, channels were clearly identified and mapped. Consequently, the location of new wells could be optimized for further reservoir development as seen in this case study of "Sienna channel

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