Integrated Seismic Attribute Analysis and 3D Static Reservoir Modelling for Fault Compartmentalization and Gas Prospect Identification in Pliocene Turbidites, Denise Field, Offshore Nile Delta, Egypt

ABSTRACT Structural compartmentalization and reservoir connectivity remain key uncertainties in mature Pliocene gas fields offshore the Nile Delta, limiting development planning and obscuring undrained potential. This study evaluates Denise Field using integrated 3D seismic attributes, petrophysics, and stochastic geocellular modelling of the Kafr El Sheikh Formation. Seismic interpretation of a 2D post‐stack time‐migrated dataset, calibrated against nine wells, identified two dominant fault systems, E–W listric growth faults and NNE–SSW oblique‐slip faults, that structurally compartmentalize the field into discrete segments. Direct hydrocarbon indicators, including bright spots, amplitude shut‐offs, and flat spots, all occurring within the established Nile Delta direct hydrocarbon indicators effectiveness window, validate gas presence across all reservoir levels. Petrophysical analysis delineated three gas‐bearing sand units within the siliciclastics of Kafr El Sheikh Formation, and the Upper Denise sandstone unit was confirmed as the essential reservoir, exhibiting effective porosity of 18%–31%, shale volume of 5%–13%, and hydrocarbon saturation reaching 88%, with a gas–water contact identified at 1481 m. A stochastic 3D geocellular model, constrained by sequential indicator simulation, reveals that faults F2, F3, and F5 act as effective seals isolating distinct pressure compartments. Integration of all datasets identified five previously undrilled prospects across three reservoir levels, with original gas‐in‐place (OGIP) estimates ranging from 37 to 205 million standard cubic feet. These results provide a validated static reservoir model that clarifies field architecture and establishes a robust foundation for dynamic simulation and infill well planning in analogous Pliocene deltaic gas systems.