Omolaiye, GEAjadi, JOlatunji, SJimoh, AYUbulom, DEN2023-01-032023-01-032021https://uilspace.unilorin.edu.ng/handle/20.500.12484/8079Characterization of petrophysical properties of reservoirs in Bima Formation was undertaken to understand their spatial distribution and impacts on hydrocarbon saturation in the highly heterolithic siliciclastic sequence. The study was carried out using nine well logs from Maiduguri and Baga/Lake sub-basins within the Borno Basin. Evaluation of the formation reveals largely undifferentiated to highly serrated and lenticular sand bifurcated by shale beds, which reduced their thicknesses variably from 0.61 to 6.1 m. The shale content in the sand bodies ranged from 11.00% to 88.00%. The formation also has variable porosity values, with calculated total porosity ranged from 10.00% to 35.00%. Similarly, effective porosity values spanned between 2.00 to 24.00%. The irregular porosity values also accounted for a wide range of field average permeability estimates computed for the formation, which measured between 0.03 to 319.49mD. Hydrocarbon saturation also varied from 40.00 to 78.00%. Gas accumulation was encountered in Ga-1, Da-1, Ar-1 and Ye-1 wells. These highly thin serrated sand beds with variable porosity and permeability constitute exploration challenges. The very thinly laminated or serrated alternation of sand and shale beds lithofacies of the Bima Formation is supportive of fluvio-lacustrine depositional environments.enBima, Chad Basin, fluvio-lacustrine, lithofacies and serrated sandResearch Subject Categories::NATURAL SCIENCESArticle