Dr. Maheswar Ojha

Specialization

Seismic exploration, Gas hydrate

Research Area

Dr Maheswar Ojha obtained BSc (Physics Hons) from Calcutta University in 1999, MSc Tech (Applied Geophysics) from IIT (ISM) Dhanbad in 2003 and PhD (Geophysics) in 2008. 

His research interests are Rock physics modelling and inversion of well log and seismic data for gas hydrate and hydrocarbon exploration. Model-based and Full waveform inversion of multichannel and Ocean Bottom Seismic data. Finite difference modelling of seismic wave propagation and numerical error analysis. Machine learning in seismic data processing, modelling, interpretation, reservoir characterization and lithology classification. Imaging of the Andaman subduction zone using marine multichannel seismic, ocean bottom seismic, gravity and magnetic data. Use of dark optical fibre cable in imaging of subsurface structure and earthquake monitoring in the Andaman & Nicobar region. Dr Ojha is a recipient of CSIR Young Scientist, INSA Young Scientist and AP Academy of Sciences Young Scientist awards.  He has about 50 research papers in reputed journals. 

FIELD OF SPECIALIZATION:

• Gas hydrate and hydrocarbon exploration using seismic, well-logs and rock physics modelling.
• Well log data analysis and interpretation.
• 2D, 3D and 4D Seismic data acquisition, processing, inversion and interpretation.
• Rock physics theories to estimate the amount of hydrocarbon and gas hydrate present in the subsurface sediments.
• Modelling and inversion of well log, marine multichannel and ocean bottom seismic (MCS & OBS) data for gas hydrate, hydrocarbon exploration and subsurface imaging.
• Model-based and Full waveform inversion of Multichannel and Ocean Bottom Seismic data.
• Finite difference modelling of seismic wave propagation and numerical error analysis.
• Machine learning in seismic data processing, modelling, interpretation, reservoir characterization and well log interpretation and lithology classification.
• Imaging of the Andaman subduction zone using marine multichannel seismic, ocean bottom seismic, gravity and magnetic data.
• Use of optical fibre cable and distributed acoustic sensing (DAS) technology in imaging of subsurface structure, strain measurement and earthquake monitoring in the Andaman & Nicobar region.

We have 7500 km 2D Marine multichannel seismic data, Ocean bottom seismic data, 3D seismic data, well-log in the Krishna Godavari, and Mahanadi offshore basins for research purposes. Marine Gravity, magnetic, 700 km 2D multichannel seismic and 63  ocean bottom seismic (OBS) data along the Andaman-Sumatra subduction zone for subsurface imaging.

We have Distributed acoustic sensing (DAS) data acquired using underground telecommunication optical fibre cable in Andaman for research purposes.

Software for data processing ang interpretation: Hampson Russel, Promax, Focus.

Coding: Fortran, Mathlab, Python

Inversion Schemes: Model-based, Very Fast Simulatated Anealing, Genetic Algorithm etc.

Students who want to pursue research on the above data using advanced and frontier technologies for hydrocarbon & gas hydrate explorations, subsurface imaging, strain measurement using DAS data etc., will be highly benefitted.  

Know what is gas hydrate (https://doi.org/10.1016/j.jseaes.2023.105828;  https://bmj.bsmrmu.edu.bd/details&cid=22) 

 Please Contact: maheswar_ojha[at]ngri[dot]res[dot]in, maheswar[dot]ngri[at]gmail[dot]com