Source rock potential assessment of the Paleocene coal and coaly shale in the Attock-Cherat Range of Pakistan

Abstract In this study the hydrocarbon generation potential of coal and coaly shale samples collected from mines in Attock-Cherat Range Pakistan is optically analytically evaluated. These samples, representing Paleocene Hangu Formation, are analyzed across a range thermal maturity stages to understand their potential. The visual examination maceral type values vitrinite reflectance have been considered while interpreting geochemical results for associated sediments Formation. group dominated by vitrinite, mainly collodetrinite, followed inertinite liptinite, suggests Type III kerogen samples. parameters suggest that post mature, however, measurements show late mature conditions gas-prone generation. overall petrographical data appear occupy gas window fall dry zone. Based on types Rock–Eval data, an anoxic terrestrial environment inferred deposition sediments. reflectance, pyrolysis, frequency macerals good quality, i.e., medium high volatile bituminous hard brown coal, lying window. Oxygen index continuously low throughout interval, which further supports quality.