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Petroleum Geosciences: Indian ContextsEstimation of In-situ Stress and Coal Bed Methane Potential of Coal Seams from Analysis of Well Logs, Ground Mapping and Laboratory Data in Central Part of Jharia Coalfield—An Overview

Petroleum Geosciences: Indian Contexts: Estimation of In-situ Stress and Coal Bed Methane... [Well log data of thirty (30) boreholes from central part of Jharia coalfield have been analysed for estimation of petrophysical and rock mechanical properties of coal seams to facilitate assessment of Coal Bed Methane (CBM) reservoir potentiality of those coal seam. Wells from Jharia area showed 18 major correlatable seams, intersected between 214 and 1324 m depth. The resistivity, density and natural gamma ray log data from the wells of the study area have been utilized for:Estimation of permeability of coal seams from resistivity log data;Computation of in-situ stress magnitudes—vertical stress, effective vertical stress and effective horizontal stress at seam horizons;Establish relationship between in-situ stress and permeability;Estimation of gas content of coal seams and identification of most potential zones for CBM exploration.It is observed that the permeability values ranging from 0.82 to 1.12 md with average gas content of 11.50 to 11.75 cc/gm. By comparing gas content, coal seam thickness as well as coal bed permeability of these major coal seams, the most viable CBM potential zone is mapped for this area.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Petroleum Geosciences: Indian ContextsEstimation of In-situ Stress and Coal Bed Methane Potential of Coal Seams from Analysis of Well Logs, Ground Mapping and Laboratory Data in Central Part of Jharia Coalfield—An Overview

Part of the Springer Geology Book Series
Editors: Mukherjee, Soumyajit
Pal, Prabir Kumar; Paul, Suman; Chatterjee, Rima
Petroleum Geosciences: Indian Contexts — May 20, 2015
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30 pages

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Publisher
Springer International Publishing
Copyright
© Springer International Publishing Switzerland 2015
ISBN
978-3-319-03118-7
Pages
143 –173
DOI
10.1007/978-3-319-03119-4_6
Publisher site
See Chapter on Publisher Site

Abstract

[Well log data of thirty (30) boreholes from central part of Jharia coalfield have been analysed for estimation of petrophysical and rock mechanical properties of coal seams to facilitate assessment of Coal Bed Methane (CBM) reservoir potentiality of those coal seam. Wells from Jharia area showed 18 major correlatable seams, intersected between 214 and 1324 m depth. The resistivity, density and natural gamma ray log data from the wells of the study area have been utilized for:Estimation of permeability of coal seams from resistivity log data;Computation of in-situ stress magnitudes—vertical stress, effective vertical stress and effective horizontal stress at seam horizons;Establish relationship between in-situ stress and permeability;Estimation of gas content of coal seams and identification of most potential zones for CBM exploration.It is observed that the permeability values ranging from 0.82 to 1.12 md with average gas content of 11.50 to 11.75 cc/gm. By comparing gas content, coal seam thickness as well as coal bed permeability of these major coal seams, the most viable CBM potential zone is mapped for this area.]

Published: May 20, 2015

Keywords: CBM potential; Jharia coalfield; In-situ stress; Well log application

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