Estimating Volume of Shale in a Clastic Niger Delta Reservoir from Well Logs: A Comparative Study

The volume of shale (Vsh) is a critical parameter in petrophysical analysis that enables the accurate estimation other parameters like effective porosity, saturation and Net-to-Gross. This an important step characterization reservoirs as well valuation hydrocarbon potentials. GR (Gamma Ray), Neutron Density Potassium, Uranium Thorium logs were adopted to estimate analyze Vsh for sand 4 reservoir interval across five wells using empirical (GR-linear non-linear) Neutron-Density methods. Results show estimated by different methods varied from 0.24 - 0.39 linear method (highest), 0.12 Larionov (intermediate), 0.04 0.28 (lowest). Although gives lowest values shale, this does not translate most reliable results. may be attributed non-singularity measurements varying sensitivities used complexities wellbore condition. non-linear (Larionov) provides consistent comparable estimations with neutron-density than consequently, recommended studied field.