Assessment of hydrocarbon generative potential of Late Paleocene coals from East Khasi Hills, Meghalaya, North-East India

Kumar, Alok; Singh, Alok K.

doi:10.1080/10916466.2022.2039185

Petroleum Science and Technology

2022

DOI: 10.1080/10916466.2022.2039185

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Assessment of hydrocarbon generative potential of Late Paleocene coals from East Khasi Hills, Meghalaya, North-East India

Alok Kumar¹,

Alok K. Singh

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2024

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Cited by 6 publications

References 27 publications

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Evaluation of Singrauli Coals for Sustainable Energy Utilisation: Insight From Geochemical and Petrographic Perspectives

Gopinathan,

Mahato,

Kumar

et al. 2024

Geological Journal

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The study investigated 50 Permian coals from the Singrauli Coalfields in the Son Valley Basin, India, using advanced petro‐geochemical techniques to assess their source rock properties, energy and utilisation potential and to reconstruct the paleodepositional environment. Petrological analysis indicated vitrinite reflectance values between 0.39% and 0.49%, classifying the Singrauli coals as sub‐bituminous to high volatile bituminous rank and indicating a thermally immature state. The results of geochemical analysis (volatile matter: 36.8%–46.5% and Tmax: 420°C–425°C) further support the above contention. High carbon content (average 77.89%), low sulphur content (average 0.46%) and varying nitrogen and oxygen levels in studied coal enhance its environmental suitability. The hydrogen index (HI: 163–279 mg HC/g TOC) values suggest a predominance of type‐III kerogen with mixed type‐II–III kerogen, further supported by petrographic data. Moreover, geochemical and petrographic data suggested the suitability of Singrauli coals for gasification. The high total organic carbon (TOC ≥ 38 wt%) indicated admirable potential as a source rock for hydrocarbon generation, particularly within the gas‐source rock zone, highlighting their suitability for energy production. Petrographic indices indicated a wet forest swamp origin with a telmatic source and bog region under ombrotrophic to mesotrophic hydrological circumstances. The association of macerals and total sulphur content further supported the conclusion of a freshwater environment during peat deposition.

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Evaluation of Singrauli Coals for Sustainable Energy Utilisation: Insight From Geochemical and Petrographic Perspectives

Gopinathan,

Mahato,

Kumar

et al. 2024

Geological Journal

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A study of geochemical and petrographic characteristics of Eocene coal from Bapung coalfield, East Jaintia Hills, Meghalaya, North East India

Nath

Kumar

2022

Arab J Geosci

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Tertiary Coal and Lignite Deposits of India and their Source Rock Potential: A Review on the Contribution of the Indian Coal Petrologists

Kumar

2022

Journal of the Geological Society of India

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Coal could be utilized as an important source of energy because it contain an ample amount of organic matter favoring suitability for hydrocarbon generation and industrial utilization. Indian coal deposits are associated with two stratigraphic horizons: Gondwana coal of the Permian age and Tertiary coal and lignites of the Paleogene age. The Permian coal has high demand in India due to its grade, for industrial utilization and power generation, resulting in the shortage of reserves with a hike in price. Therefore, people are orientated to Tertiary coal and lignite deposits for their optimum utilization. The significant lignite deposits of India occur in the states Tamil Nadu, Gujarat, Rajasthan, Jammu & Kashmir, and Kerala. Besides the lignite horizons, coal-bearing horizon seams also occur in Tertiary sediments. The known coal deposits of the Tertiary age occur in the northern and north-eastern parts of India. In the northern region, Tertiary coal deposits occur in the state of Jammu & Kashmir. Whereas, in the north-eastern part, Tertiary coal deposits are located in Meghalaya, Assam, Arunachal Pradesh, and Nagaland. The objective of this review is to provide brief information about the contribution of Indian coal petrologists on various Tertiary coal deposits for their source rock potential.

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Assessment of hydrocarbon generative potential of Late Paleocene coals from East Khasi Hills, Meghalaya, North-East India

Cited by 6 publications

References 27 publications

Evaluation of Singrauli Coals for Sustainable Energy Utilisation: Insight From Geochemical and Petrographic Perspectives

Evaluation of Singrauli Coals for Sustainable Energy Utilisation: Insight From Geochemical and Petrographic Perspectives

A study of geochemical and petrographic characteristics of Eocene coal from Bapung coalfield, East Jaintia Hills, Meghalaya, North East India

Tertiary Coal and Lignite Deposits of India and their Source Rock Potential: A Review on the Contribution of the Indian Coal Petrologists

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