Fig. 4

Neutron-Density (N-D) cross-plots for the Nubia Formation in the Saqqara Field, Gulf of Suez, Egypt. The plots illustrate lithological composition and fluid identification for four different wells. (a) N-D cross-plot of GS323-1 well, (b) N-D cross-plot of GS323-2 A well, (c) N-D cross-plot of GS323-3 well, and (d) N-D cross-plot of GS323-4 A well. The cross-plots highlight key reservoir components, including sandstone, shale, anhydrite, and gas-bearing zones. The clustering of data points along specific lithological trends provides insights into reservoir quality, porosity, and hydrocarbon potential. Color gradients indicate bulk density variations, with arrows marking gas, shale, and anhydrite regions. These analyses support the petrophysical assessment of the formation’s reservoir properties and hydrocarbon saturation. This figure was prepared using Techlog Software⁶².