“…Organic petrography deals with the microscopically visible organic matter present in rocks and is the most effective method for determining the depositional environment, the source vegetation,and the maturation level of coal and its gas generation potential (Diessel, 1983;Flores, 2002;Kalkreuth , 1991;Latif , 2021). Many researchers have provided a thorough study of several geochemical parameters in evaluating the richness, maturity and quality of source rocks, vitrinite reflectance, maceral analysis, total organic content measurement, rock-eval pyrolysis, associations between maturity and hydrocarbon generation, as well as the depositional environment (Dow, 1977;Tissot and Welte, 1978;Thompson-Rizer, 1993;Law, 1999;Vandenbroucke and Largeau, 2007;Gogoi , 2008;Salleh , 2008;Sahoo and Gogoi, 2011;Phukan , 2013;Jahan, 2016;Sharma , 2016;Singh , 2016aSingh , -b, 2017aMathews , 2020;Gogoi , 2020Gogoi , , 2021Singh and Kumar, 2020;Singh , 2022;Kar , 2022). Quantitative and qualitative analyses of different kerogen types with the geochemical study of organic matter provide a better understanding of the generating potential (GP) of source rocks (Thompson and Dimbicki, 1986;Isabel, 2012).…”