Delineation of Potential Reservoir Intervals and Lithology Variations Using Wireline Data of Drigri-01 And Kotrum-01 Wells, Middle Indus Basin Pakistan

Abstract

This study evaluates the petrophysical characteristics and lithological variations of the Kotrum-01 and Drigri-01 wells in the Middle Indus Basin, Pakistan. By using wireline log data to delineate potential reservoir intervals including gamma-ray, resistivity, neutron density and sonic logs which provided insights into shale volume, porosity, and fluid saturation. The stratigraphic correlation revealed significant facies variations influencing reservoir quality. The Habib Rahi and Lower Ranikot were the key reservoir units, demonstrating lithological heterogeneity influencing fluid distribution and storage capacity. The Cross-plot techniques used including M-N and Density-Neutron cross plots, were applied to refine lithology and fluid identification, improving reservoir characterization. Fluid saturation models, such as Archie’s and Simandoux's equations, were used to estimate water saturation and hydrocarbon distribution. These findings enhance hydrocarbon recovery potential and optimize field development strategies in the Middle Indus Basin.