Major Contributions

Established state-of-the-art Gas Hydrate Research Center at CSIR-NGRI with world-class facilities for traveltime tomography, amplitude vs. offset modeling, full-waveform tomography, impedance inversion, pre-stack depth migration, attenuation & other attribute studies, rock physics modeling, and interpretation of seismic data.
Led scientific cruises in 2007, 2010 and 2017 by designing specific experiments for the heat flow experiments off Goa and Cochin, investigation for marine gas-hydrates in Krishna-Godavari (KG) and Mahanadi basins, and imaging plate geometries in the Andaman subduction zone
Delineated gas-hydrates (future major unconventional energy resources) in KG, Mahanadi and Andaman basins from where samples were later recovered by drilling and coring for validation
Prepared gas-hydrates stability thickness map, and characterized gas-hydrates reservoirs through computation of seismic attributes (reflection strength, instantaneous frequencies, attenuation etc.); and evaluated the resource potential of gas-hydrates within Indian exclusive economic zone
Developed a new approach by combining several attributes into a meta-attribute based on artificial neural network for better delineation of subsurface features like gas-chimneys, faults, slump deposits, channel systems, volcanic intrusion etc. from 3D seismic data off New Zealand
Volcanic rocks make routine geophysical methods incapable of probing underlying Mesozoic sediments (where more than 50% oil is found globally) that have been imaged onland in Kutch, Saurashtra, Deccan Syneclise & central India. The results match with available lithologs
Developed state-of-the-art full waveform tomography and successfully applied to ONGC's wide-angle ocean bottom seismic data, for the first time, to delineate fine-scale 2D velocity structure of Mesozoic sediments below the volcanic rocks in Kerala-Konkan offshore
Delineated deep features in various geological provinces (Southern Granulite Terrain, Dharwar Craton, Eastern Ghats-Cuddapah basin, Narmada-Son Lineament, Kutch Peninsula, Marwar Basin, Bengal Sedimentary Basin, Mahanadi Delta, NW Himalaya), and shed light for tectonic implications; and understanding processes for Bhuj (2001) and Jabalpur (1997) earthquakes
Delineated fine-scale velocity structure by sophisticated full-waveform inversion of MCS data in Mahanadi and KG basins, which show features like faults to understand the gas-hydrates system