<p>This review synthesizes the geological evolution, depositional framework, petrophysical properties, and seismic characterization of Late Miocene-Pliocene gas-bearing intervals of the Nile Delta Basin, emphasizing the Abu Madi, Kafr El-Sheikh, and El-Wastani formations. These formations host the most prolific gas plays in the basin and record a complex history of Messinian incision, Pliocene channel development, and post-Messinian infill. The study performs an integrated evaluation of the sedimentological models, reservoir-quality trends, well-log data, and key seismic attributes to assess the variability in channelized, leveed, and incised-valley systems and their controls on reservoir heterogeneity and deliverability. Particular emphasis will be given to the seismic expression of stratigraphic traps, amplitude, and AVO responses, together with some challenges in imaging below evaporites and the diagnostic indicators that distinguish between productive gas sands and low-saturated gas intervals. The review is also consolidating the petrophysical trends across major fields, outlining diagenetic and facies controls on porosity and net-to-gross evolution, and comparing the reservoir potential between Messinian and Pliocene successions. Finally, residual hydrocarbon potential within both mature shallow plays and deeper underexplored intervals is assessed, providing an updated synthesis that will support ongoing exploration and future geophysical and reservoir characterization efforts within the Nile Delta Basin.</p>