2023
14th Biennial International Conference SPG 2023
Abnormal isotopic enrichment of carbon dioxide in natural gas reservoirs of coal beds: A case study of biogenic activity in thermogenic gas unconventional reservoirs of Damodar Valley
Published in GEOHORIZONS - 2023
- Vol. Vol.29 No.2, Page 1
- ISSN NO :
- DOI Link
Nisha Choudhary , Reena Singha, U.P Singhb and Kusum Lata Pangety Geochemistry Division, KDMIPIE, ONGC Ltd., Dehradun and INBIGS, Jorhat, ONGC
Abstract
The Damodar Valley Basin is the largest coal bed gas producing sites in India. However, the gas isotopic composition of this Basin was not well studied. The exploration has been focused on mature coals with a high content of thermogenic methane. The present study decipher that although the gas is thermogenic, but with significant contribution of microbial gas. The gas samples from wells R-1, R-2, R-3, R-4, R-5, R-6, R-7, J-1, J-2, J-3, B-1, B-2, B-3, B-4 and B-5 show ?13C1 ?50.3 to ?38.3
Keywords
Damodar valley Basin, Secondary microbial reduction, Stable carbon isotopic, Coal bed Methane