The objective is the 3D modeling of the Dabou onshore sedimentary basin based on data from 7 surveys. To do this, a lithostratigraphic reconstruction from gamma ray data was carried out. This reconstruction made it possible to establish a correlation between the formations and build the 3D geological model using RockWorks software.The lithological reconstruction reveals the presence of layers of sand which are intercalated by clay banks which constitute the Continental terminal. These formations are topped by two layers of barren earth, the upper layer of which is eroded in places. The correlation indicates lateral facies changes. In general, there is a decrease in the thickness of the bar earth and a considerable increase in the thickness of the Continental Terminal formations from the north to the south of the Dabou region. In places, we observe the absence of clay banks which can be explained by erosion phenomena and sedimentation gaps.The three-dimensional model makes it possible to better appreciate the evolution of the formations in the area studied. The model is mainly occupied by sands in which the clays are beveled. It highlights areas of erosion, areas of depression and elevation as well as the volumes of the formations. It reveals that the Dabou area is made up of a good sandy reservoir.

The study is a contribution to the characterization of electro-facies and lithologic facies of fluvial systems in Ivorian Continental Terminal by analyzing gamma ray recordings and lithologic percentage data. The lithostratigraphy of the well was reconstructed using Strater software by a combined analysis of GR recordings and litho-granulometric data. The analyzes reveal nine litho-granulometric facies in this well and are mainly composed of coarse sands. These are medium clayey slity sands, coarse clayey slity sands, medium sands, coarse sands, medium gravelly sands, coarse gravelly sands, very coarse gravelly sands, gravels with coarse sands and kaolins. About the electro-facies, the analysis of log GR revealed 21 diagraphic facies (electro-facies) including 4 baselines, 5 lines of positive turns and 8 negative turns and 4 egg shapes. They have been identified in the lithologic facies. The deposit environment of BNC1 well formations is characterized by log shapes such as: cylindrical, funnel, bell and Serrated. These forms reflect fluvial environments such as braided channels and meandering channels (floodplain).