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Title: Role of Composition and Depth on Pore Attributes of Barakar Formation Gas Shales of Ib Valley, India, Using a Combination of Low-Pressure Sorption and Image Analysis
Authors: Chandra D.
Vishal V.
Debbarma A.
Banerjee S.
Pradhan, Sarada Prasad
Mishra M.K.
Published in: Energy and Fuels
Abstract: Pore characterization of shale has gained attention over the years because it provides a good estimate of the total storage capacity of a gas shale reservoir. Ib Valley is a potential shale gas reservoir in India, and this study is a systematic pore analysis of these Barakar Formation shales. A combination of low-pressure gas adsorption and high-resolution scanning electron microscopy coupled with image analysis was used to characterize the pore structure and pore size distribution. The changes in pore attributes with increasing depth, varying mineral composition, and organic matter content were established. We observed a steady decrease in the micropore volume and carbon content with depth. We could successfully segregate the organic matter pores and inter- and intraparticle pores using the scanned images. Both CO2 and N2 adsorption experiments indicate high adsorption and, thereby, good gas storage capacity in the shales from shallower depth. The decrease in the micropore volume with depth may be related to higher compaction and reduced organic carbon content. From a fundamental point of view, the CO2 grand canonical Monte Carlo model shows better fitting in calculation of the pore size distribution compared to the CO2 density functional theory model.
Citation: Energy and Fuels(2020), 34(7): 8085-8098
Issue Date: 2020
Publisher: American Chemical Society
Keywords: Biogeochemistry
Carbon dioxide
Density functional theory
Gas adsorption
Organic carbon
Petroleum reservoirs
Pore size
Pore structure
Scanning electron microscopy
Shale gas
Size distribution
Gas storage capacity
Grand cano
ISSN: 8870624
Author Scopus IDs: 57209509452
Author Affiliations: Chandra, D., Department of Earth Sciences, Indian Institute of Technology Bombay, Mumbai, Maharashtra, 400076, India
Vishal, V., Department of Earth Sciences, Indian Institute of Technology Bombay, Mumbai, Maharashtra, 400076, India, Department of Civil
Funding Details: Ministry of Human Resource Development, MHRD: RD/0117-MHRDIQ1-011.Vikram Vishal acknowledges the funding support received under the MHRD IMPRINT fund scheme of the Ministry of Human Resource Development (MHRD), Government of India, New Delhi, India (Project Code 5294; RD/0117-MHRDIQ1-011). Laboratory support by the IIT
Corresponding Author: Vishal, V.; Department of Earth Sciences, India; email:
Appears in Collections:Journal Publications [ES]

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