The study presents hydrocarbon generative potential and thermal maturity of the Paleogene coals from Sutunga, Meghalaya, India using petro-geochemical method. The petrographic examination showed that the analyzed samples contain abundant vitrinite group macerals (mean 71.8%) with a significant amount of the liptinite (17.4%) group maceral, while the concentration of inertinite group is less (3.1%). Vitrinite reflectance (0.38 to 0.69 %Ro_m), indicates that the rank of Sutunga coals as sub-bituminous ‘B’ to high volatile bituminous ‘C’. The results obtained from rockeval pyrolysis show that the hydrogen index (HI) ranges from 245 to 348 mg HC/g TOC and temperature at S₂ peak (T_max) is 412 to 441 °C. These coals contain Type III and Type II/III kerogen and are immature in nature. The total organic carbon (TOC) and S₂ yield of Sutunga coals vary from 27.5–93.3 wt%, and 86.0–300.1 mg HC/g rock respectively indicating its high potential for hydrocarbon.

该研究使用石油地球化学方法展示了印度梅加拉亚邦 Sutunga 古近系煤的生烃潜力和热成熟度。岩相检验表明，分析样品含有丰富的镜质组微晶（平均 71.8%），其中 liptinite 组微晶含量显着（17.4%），而惰性组微晶含量较少（3.1%）。镜质体反射率（0.38 至 0.69 %Ro _m）表明 Sutunga 煤的等级为亚烟煤“B”至高挥发性烟煤“C”。从岩石热解获得的结果表明，氢指数 (HI) 范围为 245 至 348 mg HC/g TOC，S ₂峰温度(T _max) 为 412 至 441 °C。这些煤含有 III 型和 II/III 型干酪根，性质不成熟。Sutunga 煤的总有机碳 (TOC) 和 S ₂产率分别为 27.5-93.3 wt% 和 86.0-300.1 mg HC/g 岩石，表明其具有很高的碳氢化合物潜力。