Sethi, Chinmay and Hazra, Bodhisatwa and Boral, Prabal and Kumar, Saroj (2025) Insights from Optical-Electron Correlative Microscopy on Shales Subjected to Underground Thermal Treatment. Journal of the Geological Society of India , 101 (5). ISSN 0016-7622

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Abstract

Extracting hydrocarbons from low-permeability shale is challenging. While hydraulic fracturing is typical, it poses environmental risks. This study explores underground thermal treatment (pyrolysis) using optical-electron correlative microscopy on an organic-rich shale from the Permian Barakar Formation, Rajmahal Basin, India. Thermal treatment (350–650°C) expanded liptinite pores (10 – 294 μm), while inertinite retained primary pores, and vitrinite showed no SEM-detectable pores. At 650°C, extensive pore enlargement and rupture indicate hydrocarbon expulsion. These findings provide key insights into maceral-specific porosity evolution, improving understanding of in-situ thermal treatment for unconventional hydrocarbon recovery.

Item Type:	Article
Subjects:	Non-Conventional Energy and Instrumentation
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	07 May 2025 06:18
Last Modified:	07 May 2025 06:18
URI:	http://cimfr.csircentral.net/id/eprint/2814

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