Paleodepositional and Hydrocarbon Source-Rock Characteristics of the Sonari Succession (Paleocene), Barmer Basin, NW India: Implications from Petrography and Geochemistry

Singh, Vikram P.; Singh, Bhagwan D.; Mathews, Runcie P.; Singh, Ashutosh Kumar; Mendhe, Vinod Atmaram; Mishra, Subhashree; Banerjee, Mollika

doi:10.1007/s11053-022-10079-y

Cited by 5 publications

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“…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).…”

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confidence: 99%

Rock-Eval Pyrolysis and Petrographic Characteristics of Coals of Chintalapudi Sub-Basin, Pranhita-Godavari Basin, Southern India: Implication to Depositional Environment

Kiran¹,

Gogoi²

2023

JGSR

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The results of the Rock-Eval pyrolysis and petrological investigation carried out on coal samples from the Chintalapudi sub-basin of the Pranhita- Godavari basin have been discussed to identify the assessment of the maturity, type, and quantity of organic matter and interpret the depositional environment. Petrographically these coals are enriched in vitrinite (40.0%-60.7%) followed by liptinite (7.3%-26.0%) and inertinite (9.3%-24.0%) macerals.TOC concentrations range from 17.54% to 64.97%. S1 ranges from 0.30% to 1.63% and S2 ranges from 11.70% to 138.06% are considered to be good source rocks. The Tmax values of the Chintalapudi sub-basin coals are found to be between 420°C to 428°C, indicating an immature source rock for the production of oil. The coal samples have an average HI of 157 mg HC/g TOC and VRo of 0.30% placing them in the Type III gas kerogen range. HI, and OI values reveal that the samples of organic matter composition mostly follow the evolutionary route of mixed Type II/III kerogens and are contributed by terrestrial plants which is the main source of the organic matter. The GI (1.67-5.95) and TPI (2.75-47.14)values favour the existence of wet moor with moderate to severe floods with short periods of alternateoxic and anoxic moor environments due to the high concentration of vitrinite that allowed for adequate tissue preservation. Keywords: Kerogen, Rock-Eval Pyrolysis, Petrography, Chintalapudi Sub-basin

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