Assessing the unconventional reservoirs of the Nukhul formation in the Rudeis-Sidri Field, Gulf of Suez: petrophysical characterization and flow unit discrimination

< 1 μm), requiring stimulation for economic recovery. Hydraulic Flow Unit (HFU) classification subdivides the reservoir into 8 HFUs, where HFU-1 and HFU-2 contribute the largest portion of flow (14.11% and 16.52% of total flow capacity) and equivalent to PSRT1 and PSRT2, which are characterized by the highest RQI and FZI values, wide pore-throat sizes, high permeability, and excellent flow capacity, while HFU-8 contributes 0%, highlighting uneven productivity distribution. This integration reveals that the Nukhul Formation is classified as an unconventional, tight reservoir with limited but heterogeneous hydrocarbon potential. Productive intervals exist but are restricted to specific HFUs, meaning advanced recovery techniques (hydraulic fracturing, horizontal drilling) are essential for efficient hydrocarbon exploitation.