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Petrographic Characterization and Langmuir Volume of Shales from Raniganj Coal Basin, India

IR@CIMFR: CSIR-Central Institute of Mining and Fuel Research, Dhanbad


Field	Value

Title	Petrographic Characterization and Langmuir Volume of Shales from Raniganj Coal Basin, India

Creator	Mendhe, V.A.

Subject	Methane Emission and Degasification

Description	Shale gas is becoming a very important energy resource throughout the world. 10 borehole samples of varying depths from 755-1480m belonging to barren Measures (upper Permian). Raniganj (upper Permian) and panchet (lower Triassic) formations of Raniganj coal basin have been selected. Various analyses have been carried out viz. technological, elemental composition, x-ray diffraction, Fourier transform infrared (FTIR), rock eval pyrolysis, organic petrography and sorption analyses, different types of organo-petrographic entities viz. sandy clay, clayey sand, organosandy-clay, humic clay and organic clay were identified. Shaly-microlithotypes were also differentiated. The macerals (organic matter in shales) exhibit normal maturity course. Sorption studies were used for extimating Langmur volume of shale samples which depicts good correlation with total organic carbon (TOC), organic clay and organo-silty-clay separately. Langmuir volume was also observed to indicate good correlation with shaly-microlithotype which point towards positive role of organic matter and clay association in gas adsorption. Vt60 (volume of vitrinite grains with reflectance greater than 0.60%) indicates that Barren Measures and Raniganj Formation has good hydrocarbon generation potential.

Publisher	Geological Society of India, Bangalore

Date	2015-09

Type	Article PeerReviewed

Identifier	Mendhe, V.A. (2015) Petrographic Characterization and Langmuir Volume of Shales from Raniganj Coal Basin, India. Journal of the Geological Society of India , 86 (3). pp. 283-294. ISSN 0016-7622

Relation	http://cimfr.csircentral.net/1519/