In the Jemmel-Z,ramdine region, the combined analysis of petroleum well data, seismic reflection profiles, and gravity data show the presence of the Z,ramdine fault corridor, which was activated in the Neogene period. Both tectonic activity and fluvio-deltaic sedimentation are the origin of the lithologic and hydrodynamic heterogeneities. Thus, the Z,ramdine fault corridor constitutes a limit between two hydraulic systems formed by Miocene sandy reservoir layers. These reservoirs have not been exploited yet and could be new water resources which can extremely benefit the region; only the upper one is exploited in the Jemmel-Bembla and Z,ramdine-B,ni Hassen deep aquifers. The wire line logging, seismic reflection, and gravity interpretations show the distribution of the Miocene layers which formed the Sahel Miocene deep aquifers. The Z,ramdine fault corridor leads to a spatial variability in number, distribution, depths, and thicknesses of these reservoir layers. In the northern part of the Z,ramdine fault corridor, seven layers were highlighted; their thicknesses range between 15 and 105 m. However, in the southern part, only four strata were deposited: their thicknesses vary between 45 and 53 m. The total porosity of the studied aquifers is about 30%.
