Application of Cross-Plotting Techniques for Delineation of Coal and Non-Coal Litho-Units from Well Logs


Well log responses can be used to delineate coal and carbonaceous shale from other non-potential litho-units by cross-plotting technique. The cross-plotting between gamma ray and density had been carried out for 15 wells of Jharia coalfield, India. Through these different cross-plots across the study area, different litho-units like; coal, shaly coal, carbonaceous shale, shale, sand/sandstone, shaly sand, jhama and igneous intrusion (mica peridotite) have been identified. Clustering of points for different lithologies in the above cross-plots indicate that the different trends with marginal overlap between carbonaceous shale/shaly coal and shale as well as shaly sand and shale. The coal horizons are mostly overlain and underlain by shale or sandstone. Cross-plot analysis indicates the various coal lithologies which will play important role in CBM exploration and exploitation strategy.

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R. Chatterjee and S. Paul, "Application of Cross-Plotting Techniques for Delineation of Coal and Non-Coal Litho-Units from Well Logs," Geomaterials, Vol. 2 No. 4, 2012, pp. 94-104. doi: 10.4236/gm.2012.24014.

Conflicts of Interest

The authors declare no conflicts of interest.


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