Abstract

This paper represents the geochemical characteristics of Gondwana coals from the Barapukuria coal mine,Bangladesh in order to investigate the potential for hydrocarbon generation. A total number of twenty three coal sampleswere analyzed – Rock-Eval pyrolysis, CHNS elemental analyses, maceral analysis and vitrinite reflectance. The sampleswere collected from drill hole GDH-40 of the Barapukuria coal mine encountered within Gondwana succession ofPermian age. The TOC contents of the coal samples range between ~50 and 76 wt.% and the organic matter consistspredominantly of type III and type IV kerogen with respect to hydrocarbon generation. The GP, HI, PI and Tmaxvalues range between 7 and 35 mg HC/g rock, 20 and 62 mg HC/g TOC, 0.02 and 0.04, and 430 and 437 oC, respectively.The organic matter is mainly gas prone and thermally immature to early mature level. The potential coal bed methane(CBM) generation of the Barapukuria basin is estimated to be 11 Gm3. Thus, underground coal gasification (UCG)is helpful for better development of subsurface coals at the Barapukuria basin, Bangladesh.This paper represents the geochemical characteristics of Gondwana coals from the Barapukuria coal mine,Bangladesh in order to investigate the potential for hydrocarbon generation. A total number of twenty three coal sampleswere analyzed – Rock-Eval pyrolysis, CHNS elemental analyses, maceral analysis and vitrinite reflectance. The sampleswere collected from drill hole GDH-40 of the Barapukuria coal mine encountered within Gondwana succession ofPermian age. The TOC contents of the coal samples range between ~50 and 76 wt.% and the organic matter consistspredominantly of type III and type IV kerogen with respect to hydrocarbon generation. The GP, HI, PI and Tmaxvalues range between 7 and 35 mg HC/g rock, 20 and 62 mg HC/g TOC, 0.02 and 0.04, and 430 and 437 oC, respectively.The organic matter is mainly gas prone and thermally immature to early mature level. The potential coal bed methane(CBM) generation of the Barapukuria basin is estimated to be 11 Gm3. Thus, underground coal gasification (UCG)is helpful for better development of subsurface coals at the Barapukuria basin, Bangladesh.

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