Abstract

In this study, core samples of Permian shales of Raniganj field were analysed to evaluate their gas generation potential using Rock Eval pyrolysis techniques. The Total Organic Content (TOC) of the shale units of Barakar, Barren Measures and Raniganj Formations ranges from 3.75 wt% to 20.9 wt% whereas hydrogen index (HI) ranges from 58.45 to 125.34 mg HC/g TOC. Present study suggests early to late maturated (0.6 to 1%) organic matters in Barren Measures with gas prone type III kerogen. The study investigates the effect of burial history on the preservation and maturation of organic matters. The organic richness, kerogen type and thermal maturity the Permian shales are signifying fair to excellent gas generation potential.