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Proceedings of the 5th Conference & Exposition on Petroleum Geophysics

Evaluation of Coal Bed Methane through Wire Line Logs Jharia field: A Case Study

Published in GEOHORIZONS - 2004

D. K. Rai, Sunit Roy A. L.Roy

Abstract


Methane produced from coal beds was for years a nightmare for the mining industry. Coal bed constitutes a new type of reservoir for the oil and gas industry to explore. This new reservoir does not lend itself readily to conventional well log analysis. However, new log analysis techniques have developed which increases the chance for a successful well. This study is summarized with a procedure to evaluate the parameters of proximate analysis using wire line logs of Barakar formation of Jharia Block in the State of Jharkhand. Methane produced from coal beds is a developing resource in the States of W. Bengal & Jharkhand. The evaluation of this resource is done by coring and testing. Core analysis and production tests are essential information to use with log analysis to make meaningful evaluation from wire line logs. The objective of this case study was to establish a relation of the wire line log value to evaluate the parameters of proximate analysis and to match with the laboratory evaluated values. Further, a model has been designed to evaluate the values as quick look interpretation technique. The proximate analysis data from the wells of Jharia field in which coal core was cut was used to calibrate the log analysis in this case study. Barakar formation in this area has predominantly high to medium volatile bituminous coal. The evaluation technique required to be tested for their accuracy before being used for coal beds of different rank

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