Reservoir Quality Prediction of Gas-Bearing Carbonate Sediments in the Qadirpur Field: Insights from Advanced Machine Learning Approaches of SOM and Cluster Analysis

The detailed reservoir characterization was examined for the Central Indus Basin (CIB), Pakistan, across Qadirpur Field Eocene rock units. Various petrophysical parameters were analyzed with integration of various cross-plots, complex water saturation, shale volume, effective porosity, total hydrocarbon neutron porosity and sonic concepts, gas effects, lithology. In total, 8–14% high 45–62% saturation are superbly found in reservoirs Eocene. Sui Upper Limestone is one poorest among all these reservoirs. However, this has few intervals rich hydrocarbons highly values. volume ranges from 30 to 43%. filled porosities along secondary porosities. Fracture–vuggy, chalky, intracrystalline main contributors porosity. produce without gas-emitting carbonates an irreducible rate 38–55%. order evaluate lithotypes, including axial changes characterization, self-organizing maps, isoparametersetric maps parameters, litho-saturation cross-plots constructed. Estimating wells understanding prospects both feasible methods employed study, could be applied anywhere else comparable basins.