Petrographic characteristics and palaeoenvironment of the Permian coal resources of the Barapukuria and Dighipara Basins, Bangladesh

Farhaduzzaman, Md.; Abdullah, Wan Hasiah; Islam, Md. Aminul

doi:10.1016/j.jseaes.2012.12.017

Cited by 19 publications

(13 citation statements)

References 40 publications

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“…Limited research on the geochemical and petrological aspects of Gondwana Group coals in Bangladesh has been published (Bostick et al, 1991;Frielingsdorf et al, 2008;Farhaduzzaman et al, 2013). Farhaduzzaman et al (2012b) investigated coal seam VI in the Barapukuria basin, but no detailed analyses of the coals and of their relationship with other fine-grained sediments have so far been published.…”

Section: Introductionmentioning

confidence: 99%

Organic Facies Variations and Hydrocarbon Generation Potential of Permian Gondwana Group Coals and Associated Sediments, Barapukuria and Dighipara Basins, Nw Bangladesh

Farhaduzzaman

Abdullah

Islam

et al. 2013

Journal of Petroleum Geology

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In the Barapukuria and Dighipara coal basins, NW Bangladesh, the Basement Complex is overlain by the coal‐bearing Permian Gondwana Group. In the present study, 36 core samples collected from five boreholes in these two basins were analysed using organic geochemical and organic petrological methods. Based on the results of biomarker analyses (TIC, m/z 191 and m/z 217 fragmentograms) and maceral composition (proportions of vitrinite, liptinite, inertinite), three organic facies were identified: coals, carbargillites and mudstones. Together with other evidence, cross‐plots of HI versus Tmax and Pr/nC17 versus Ph/nC18 indicate that the coals, as expected, were dominated by terrestrial organic matter (OM). The carbargillites contained a mixture of terrestrial and probable Type II aquatic OM, and the mudstones contained mostly terrestrial OM. Accordingly the coals, carbargillites and mudstones are interpreted to have been deposited in swamp‐dominated environments in a delta‐plain setting which was subject, in the case of carbargillites, to periodic flooding. Suboxic conditions were indicated by very high Pr/Ph ratios and a high content of inertinite macerals. All the samples analysed were immature or early mature for hydrocarbon generation, as indicated by mean vitrinite reflectance (%Ro) of 0.60–0.81%, Rock‐Eval Tmax of 430–439°C, and biomarker ratios (hopane C32 22S/(22S+22R)) of 0.57–0.60. Carbargillites showed potential for both liquid and gaseous hydrocarbon generation; coals were mainly gas‐prone with minor liquid hydrocarbon potential; and mudstones were dominantly gas‐prone. The oil‐prone nature of the samples was attributed to the presence of resinite, cutinite, bituminite and fluorescent vitrinite. The presence of exsudatinite within crack networks, solid bitumen and oil droplets as well as bituminite at early oil‐window maturities suggests that the organic matter may have expelled some hydrocarbons.

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Section: Introductionmentioning

confidence: 99%

Organic Facies Variations and Hydrocarbon Generation Potential of Permian Gondwana Group Coals and Associated Sediments, Barapukuria and Dighipara Basins, Nw Bangladesh

Farhaduzzaman

Abdullah

Islam

et al. 2013

Journal of Petroleum Geology

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“…For organic petrographical study, the samples were prepared by mounting whole rock fragments in resin blocks and polished to a highly reflecting surface using FIGURE 1. Location map of the study area showing major tectonic elements of the Bengal Basin (Farhaduzzaman et al 2012a(Farhaduzzaman et al , 2013a(Farhaduzzaman et al , 2013cIslam 2009;Reimann 1993) progressively finer alumina suspension (1, 0. Peters and Cassa (1994).…”

Section: Samples and Methodsmentioning

confidence: 99%

Petroleum Source Rock Properties of the Neogene Bhuban Shales, Bengal Basin, Bangladesh

Farhaduzzaman¹,

Abdullah²,

Islam³

2015

JSM

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“…Inertinite group: In the analyzed coals, the macerals of the inertinite group are recognized through their unique higher reflectance in white light and the paucity of fluorescence in ultraviolet light in comparison to the vitrinite and/or liptinite [40]. Semifusinite (avg.…”

Section: Maceral Characteristicsmentioning

confidence: 99%

“…Numerous scholars have reported the paleo-environmental conditions according to the quantitative relations between the tissue and non-tissue-derived components [1,40]. Diessel [20] described a coal facies model based on two indices, including the tissue preservation index (TPI) and gelification index (GI).…”

Section: Coal Facies Indicesmentioning

confidence: 99%

Petrographic Controls on Pore and Fissure Characteristics of Coals from the Southern Junggar Coalfield, Northwest China

et al. 2018

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Abstract:The productive potential of coalbed methane projects is controlled by pore and fissure characteristics, which are intrinsically related to coal petrology. This work attempts to identify the influence of petrographic factors on the development of pore and fissure systems in the southern Junggar Coalfield, Northwest China. Here, Middle Jurassic coal (lignite and subbituminous) petrology in coal seam No. 45 of the southern Junggar Coalfield (SJC) is studied with respect to the characteristics of pore and fissure structure with the aid of optical microscopes, scanning electron microscopy, mercury intrusion porosimetry, and nuclear magnetic resonance analysis. Maceral analysis shows coals at the SJC are dominated by vitrinite (38-87 vol %), with moderate quantities of inertinite (1-28 vol %) and liptinite (0.5-30 vol %). Decomposition of plants occurs under slightly oxic-anoxic conditions, with good tissue retention. Four types of coal facies are classified using petrographic indices, comprising (1) lower delta plain marsh, (2) lower delta plain fen, (3) upper delta plain wet forest swamp; and (4) piedmont plain moor. Pores and fissures are generally observed in telinite, collotelinite, fusinite, and semifusinite in SJC coals, indicating that the generation of pores and fissures is strongly influenced by coal macerals. Pore and fissure structures of coals in coal facies (1) appear weakly connected, whereas those in coal facies (2) reveal good connectivity. Coals in coal facies (3) and (4) show moderate connectivity between pore and fissure structure. Therefore, pore and fissure structures are significantly controlled by coal facies. This work provides practical recommendations and implementation methods for petrological studies in future coalbed methane exploration/development in the SJC. This study also serves to predict the physical properties of pores and fissures and interpret the control mechanism of coalbed methane production using coal petrology.

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Petrographic characteristics and palaeoenvironment of the Permian coal resources of the Barapukuria and Dighipara Basins, Bangladesh

Cited by 19 publications

References 40 publications

Organic Facies Variations and Hydrocarbon Generation Potential of Permian Gondwana Group Coals and Associated Sediments, Barapukuria and Dighipara Basins, Nw Bangladesh

Organic Facies Variations and Hydrocarbon Generation Potential of Permian Gondwana Group Coals and Associated Sediments, Barapukuria and Dighipara Basins, Nw Bangladesh

Petroleum Source Rock Properties of the Neogene Bhuban Shales, Bengal Basin, Bangladesh

Petrographic Controls on Pore and Fissure Characteristics of Coals from the Southern Junggar Coalfield, Northwest China

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