Evaluation of Coal Quality and Geomechanical Moduli using Core and Geophysical Logs: Study from Middle Permian Barakar Formation of Gondwana Coalfield 8th February 2022 – Posted in: Exploration

ICRMEG: 20th International Conference on Rock Mechanics and Engineering Geology, Sydney, Australia, Mar 29-30, 2018

Middle Permian Barakar formation is the major economic coal bearing unit of vast east-west trending Damodar Valley basin of Gondwana coalfield. Primary sedimentary structures were studied from the core holes, which represent majorly four facies groups: sandstone dominated facies, sandstone-shale heterolith facies, shale facies and coal facies. Total eight major coal seams have been identified with the bottom most seam being the thickest. Laterally, continuous coal seams were deposited in the calm and quiet environment of extensive floodplain swamps. Channel sinuosity and lateral channel migration/avulsion results in lateral facies heterogeneity and coal splitting. Geophysical well logs (Gamma-Resistivity-Density logs) have been used to establish the vertical and lateral correlation of various litho units field-wide, which reveals the predominance of repetitive fining upwards cycles.

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