Mrinal Sen is a specialist on seismic wave propagation including anisotropy, Geophysical inverse problems, and methods for constructing synthetic seismograms in heterogeneous media. His areas of research include classical whole earth seismology, applied seismology and inverse theory. Over the years, he worked on several geophysical parameter estimation problems. He and his colleagues were able to demonstrate that global optimization methods such as simulated annealing (SA) and genetic algorithms (GA) can be used effectively for several geophysical applications such as seismic waveform inversion, gravity interpretations, and seismic migration velocity analysis. He also showed how one could apply Gibbs' sampling and the Metropolis rule to characterize uncertainties and the posterior probability density function (PPD) in model space. He has extended seismic plane wave analysis methods to anisotropic media and developed techniques for estimating the parameters that determine the degree of anisotropy. His most recent accomplishments in exploration seismology include developing novel methods for characterizing reservoirs using seismic and well log data, estimating P- and S-wave velocity models for sediments containing gas hydrates from seismic reflection data, and, improving seismic imaging and velocity estimation methods in structurally complex areas. In whole earth seismology he has estimated the anisotropy in the D" region of the earth's deep interior. He is continuing to actively pursue research problems that require development of new analytic and numerical methods in both exploration and whole earth seismology. For example using seismic reflection data particularly from zones of gas hydrates, he is attempting to find high resolution compressional and shear wave velocities and relate these to gas and hydrate concentration levels and their distribution. For 3D exploration reflection seismic data he is attempting through model based inversion methods to relate these data to reservoir properties and their changes during production via seismic time lapse data. For global seismic data he is working on event discrimination methods based on inverse modeling.

Areas of Expertise

Seismic wave propagation including anisotropy, geophysical inverse problems, earthquakes and earth structure, applied seismology, petroleum exploration including 4D seismology


Current Research Programs & Projects

EDGER Forum ( view )

Center for Frontiers of Subsurface Energy Security


Select Past Research

Joint Inversion of Seismic and Fluid Flow Data

Seismic Inversion for the Estimation of Crustal Velocity Structure

Seismic Modeling of Fractured Reservoirs

WEMI-Wave Equation Migration Inversion

Collaborative Research: ITR-:Data Driven Simulation of the Subsurface: Optimization and Uncertainty Estimation

Collaborative Research: CMG: Stochastic Representation of Parameter Uncertainty within Model Predictions of Future Climate

A Data Intense Challenge-Instrumented oil field of the future

Determination of Crustal Structure by Inversion of Shear-Coupled PL waves using global optimization

Integrated Approach to Petrophysical Interpretation of post- and pre-stack 3D Seismic Data, Well-Log Data, Core Data, Geological Information and reservoir production data via Bayesian stochastic inversion

Airrbore GPR for the detection of Underground Facilities

"Collaborative Research: 3-D Seismic Imaging of an Active Margin Hydrate System - Oregon Continental Margin"

SLOSEIS: Slowness Analysis, Waveform Inversion and Uncertainty Estimation in VTI Media

Parameter Estimation in Anisotropic Media

Recipient of Dr. Hari Narayan award of the Geological society of India, 2013 - Geological society of India (2013)

Fellow, Geological society of India, 2013 - Geological society of India (2013)

Recipient of decennial gold medal of the Indian Geophysical Union (IGU), 2012 - Indian Geophysical Union (IGU) (2012)

Fellow, A. P. Akademi of sciences, 2012 - AP Akademi of Sciences, Hyderabad (2012)

Recipient of SPG, India honorary membership, 2012. - The Society of Petroleum Geophysicists, India (SPG) (2012)

UTIG Directors Circle of Excellence - Jackson School of Geosciences, UT-Austin (2010)

John A. and Katherine G. Jackson Chair in Applied Seismology - Jackson School of Geosciences, UT-Austin (2007)

Joseph C. Walter Jr. Award for Research Excellence - Jackson School of Geosciences, UT-Austin (2007)

Outstanding Student Paper Award - AGU Fall meeting, San Francisco (2004)

Best Paper Award (presented by a student) - SEG2004 in Denver (2004)

Best Paper Award (best paper on AVO inversion) - SEG/EAEG Summer Research Workshop (1992)

Recipient of J. Watumul Foundation Award for the most outstanding student in Geology and Geophysics - University of Hawaii (1986)

Recipient - SEG Scholarship (1986 - 1987)

Recipient - SEG Scholarship (1985 - 1986)

Recipient - SEG Scholarship (1984 - 1985)

Recipient of ISM silver medal for ranking first in first class in BSc and MSc - Indian School of Mines

Member, National Science and Engineering Research Council (NSERC) Canada , collaborative research grant site review committee, March 2014, collaborative research grant site review committee, National Science and Engineering Research Council (NSERC) Canada (2014)

Member, Editorial Board, Geohorizons (2011 - Present)

Member, Technical Program Committee (key contact - seismic inversion), Society of Exploration Geophysicists’ annual meeting, San Antonio, Texas, 2011 (2011)

Member, 2011 NSF Graduate Research Fellowship Program (GRFP), Terrestrial Geosciences Panel, NSF (2011)

Co-chair,, Technical Program Committee, SEG representative,, Society of Petroleum Geophysicists’ annual meeting, Hyderabad, India, (2010)

Guest Editor, Geohorizons Decmeber 2009, publication of the Society of petroleum geophysicists, India (2009)

Member, Technical Program Committee (key contact - seismic inversion),, Society of Exploration Geophysicists’ annual meeting, Houston, Texas, 2009 (2009)

Co-convenor, Workshop on ‘Seismic Interferometry’, SEG annual meeting, Houston, Texas, Oct. 09., Society of Exploration Geophysicists (2009)

Co-convenor,, Workshop on ‘Bayesian method for geological model building’, EAGE meeting, Amsterdam, The Netherlands, July 09., European Association of Geophysicists and Engineers (2009)

Member, Editorial Board, International Journal of Geophysics (2008 - 2011)

Co-chair,, Technical Program Committee, SEG representative,, Society of Petroleum Geophysicists’ annual meeting, Hyderabad, India, 2008. (2008)

Associate Editor, Seismic Migration section, Geophysics (2006 - Present)

Associate Editor, Seismic Modeling and Wave Propagation section,, Geophysics (2006 - Present)

Member, Editorial Board (Advisory Committee), Journal of Indian School of Mines (2006 - Present)

Associate Editor, Journal of Seismic Exploration (2005 - Present)

Co-chair, Technical Program Committee, SEG representative, Society of Petroleum Geophysicists' annual meeting, Hyderabad India (2004)

Visiting Professor, Section Applied Geophysics, Delft University of Technology, The Netherlands (2001)

Member, Technical Program Committee, Society of Exploration Geophysicists' annual meeting, San Antonio, Texas (2001)

Invited Panel Member, Global inversion of Geophysical Data, DOE workshop, San Jose, California (1999)

Invited Participant (unclassified), "Detection of Underground Facilities", DARPA Geophysics seminar (1999)

Member, External Review Board , Marine Geosciences Division Basic and Applied Research programs, Office of Naval Research (1999)

Invited Participant, How uncertainty is related to ocean science models?", National Research Council (NRC) planning workshop, Washington D.C. (1999)

Consultant, Upstream Strategic Research Group, MOBIL Oil Company, Dallas, TX (1998)

Consultant, Rock Physics / Seismic Attributes Group, AMOCO Research Center, Tulsa, OK (1998)

Associate Editor, Computational Seismology and Geodynamics, American Geophysical Union (1997 - Present)

Invited Participant, 2 week workshop on "Inverse Problems at the Institute of Mathematics and Its applications.", University of Minnesota (1995)

Visiting Scientist, NRL-SSC, Bay St. Louis, MS (1993)

Research Seismologist, Hawaii Institute of Geophysics (1987)

Geophysical Intern, SOHIO Petroleum Company, Dallas, TX (1985)

Teaching , Inverse Theory, to be entered

Teaching, Advanced Theoretical Seismology, to be entered

Teaching, Solid Earth Geophysics, to be entered

Teaching, Linear systems and inverse methods, to be entered

Teaching, Seminar courses on seismic migration and inversion, to be entered

Teaching, Asymptotic methods in seismic wave propagation, to be entered

Member, European Academy of Sciences

Member, American Geophysical Union

Member, European Association of Geoscientists and Engineers

Member, Society of Exploration Geophysicists

Member, Society of Industrial and Applied Mathematics

Member, International Committee, Society of Exploration Geophysicists

Member, Computer Application Committee, Society of Exploration Geophysicists

Ph.D. Advisor, L.N. Frazier, University of Hawaii

Member, Research Committee, Society of Exploration Geophysicists

Postdocs

Rui Zhang, 2011 - 2012

Ranjana Ghosh, 2010 - 2012

Deng Zhiwen, 2010 - 2011

Puneet Saraswat, 2010 - 2010

Jonas DeBasabe, 2009 - 2011

Ma Jitao, 2009 - 2010

T. Vikranth Babu, 2009 - 2009

Yang Liu, 2008 - 2009

Adrian Ciuciavara, 2008 - 2009

Ravi Srivastava, 2008 - 2009

Utpal Dutta, 2007 - 2010

Armando Sena, 2007 - 2009

Nimiisha Vedanti, 2007 - 2008

Jin Long, 2006 - 2008

A. Pal, 2006 - 2008

Abhijit Gangopadhyay, 2006 - 2007

S. Rajput, 2006 - 2007

Joost van der Noot, 2006 - 2006

S. Rajput, 2006 - 2006

Utpal Duta, 2005 - 2005

Murthi Guddati, 2004 - 2004

Wulfgang Bangerth, 2003 - 2005

Zhan Wu, 2003 - 2004

Y. Xia, 2002 - 2003

Qiaozhen Mu, 2002 - 2003

Ranjit Shaw, 2002 - 2003

Lopamundra Roy, 2002 - 2003

Robert Nowack, 2001 - 2001

Milton Porsani, 2001 - 2001

Indrajit Roy, 2000 - 2003

J. Pestana, 1998 - 1999

Roustam Seif, 1998 - 2004

Farup Akbar, 1997 - 1998

Jay Pulliam, 1995 - 1997

R. Phillip Bording, 1995 - 1997


Graduate Students

Qi Ren, Ph.D., expected 2016 (Co-supervisor)

Zeyu Zhao, Ph.D., expected 2016 (Supervisor)

Yawen He, Ph.D., expected 2016 (Co-supervisor)

Russell W Carter, Ph.D., expected 2015 (Committee Member)

Lauren E Becker, M.S., expected 2014 (Committee Member)

Yang Xue, Ph.D., expected 2014 (Supervisor)
seismic inversion for reservoir characterization and monitoring

Vladimir Bashkardin, Ph.D., expected 2012 (Committee Member)

Jamin S Greenbaum, Ph.D., expected 2012 (Committee Member)

Erick Leuro, Ph.D., expected 2009 (Committee Member)

Debanjan Datta (Supervisor)

Biswajit Mandal, Ph.D., 2014 (Supervisor)
National Geophysical Research Institute/Osmania University

Yang Xue, Ph.D., 2013 (Supervisor)
UT-DGS

Kumar Das, M.S., 2013 (Supervisor)
UT-DGS

Terence Campbell, Ph.D., 2013 (Committee Member)
UT-DGS

Sharif Morshed, M.S., 2013 (Committee Member)
UT-DGS

Sandy Suhardja, Ph.D., 2013 (Committee Member)
UT-DGS

Isaac Smith, Ph.D., 2013 (Committee Member)
UT-DGS

Yu Xia, M.S., 2013 (Committee Member)
UT-DGS

Masoumeh Kordi, Ph.D., 2013 (Committee Member)
UT-DGS

Yang Wang, M.S., 2013 (Committee Member)
UT-DGS

Kumar Sundaram Das, M.S., 2013 (Supervisor)
Jackson School of Geosciences

Mohammed Alhussain, Ph.D., 2013 (Supervisor)
Jackson School of Geosciences

Alexander Lamb, M.S., 2012 (Committee Member)
UT-DGS

Kwon Taek Oh, M.S., 2012 (Committee Member)
UT-DGS

Yi Tao, Ph.D., 2012 (Supervisor)
Jackson School of Geosciences

William Burnett, Ph.D., 2011 (Committee Member)
UT-DGS

Alireza Shahin, Ph.D., 2011 (Committee Member)
UT-DGS

Corey Joy, M.S., 2011 (Supervisor)
Effective medium modeling of carbon sequestered reservoirs

Son Phan, M.S., 2011 (Supervisor)
Uncertainty in reservoir parameter estimation

Ankesh Anupam, M.S., 2010 (Committee Member)
UT-DGS

Bryce Wagner, Ph.D., 2010 (Committee Member)
UT-DGS

Fang Ye, M.S., 2010 (Committee Member)
UT-DGS

Na Shan, M.S., 2010 (Committee Member)
UT-DGS

Adam Allan, B.S., 2009 (Co-supervisor)
DGS-UT

Chunlei Chu, Ph.D., 2009 (Committee Member)
UT-DGS

Enrique Rosero Ramirez, Ph.D., 2009 (Committee Member)
UT-DGS

Ma Jitao, Ph.D., 2009 (Supervisor)
China University of Petroleum
Multiple attenuation in plane wave domain

Jonas De Basabe, Ph.D., 2009 (Supervisor)
University of Texas at Austin, Computational and Applied Mathematics
Numerical Simulation of Elastic Wave Propagation

Samik Sil, Ph.D., 2009 (Supervisor)
Two-way travel time analysis for seismic reservoir characterization

Tao Liu, Ph.D., 2009 (Supervisor)
Beijing University, Department of Geophysics
Hybrid finite difference-finite element of seismic wave propagation

Chaoshun Hu, Ph.D., 2008 (Committee Member)
UT-DGS

Sasha Carter, Ph.D., 2008 (Committee Member)
UT-DGS

Ali Aljadher, M.S., 2008 (Committee Member)
UT-DGS

Theresa Marie Diehl, Ph.D., 2008 (Committee Member)
UT-DGS

Komars Eskandaridalvand, Ph.D., 2008 (Committee Member)
UT Dept of Petroleum and Geosystems Engineering

Daniel Smith, M.S., 2008 (Supervisor)
Seismic Trace Regularization and Datuming

Abdul Aziz Al-Aslani, M.S., 2008 (Supervisor)
Post-stack inversion for porosity estimation of carbonate reservoirs

Tiancong Hong, Ph.D., 2008 (Supervisor)
MCMC Algorithm, Integrated 4D Seismic Reservoir Characterization and Uncertainty Analysis in a Bayesian Framework

Irina Filina, Ph.D., 2007 (Committee Member)
UT-DGS

Edgar Pinxon, M.S., 2007 (Committee Member)
UT-DGS & Bureau of Economic Geology

Hao Xun, 2007 (Committee Member)
UT-DGS

Audrey Neau, Ph.D., 2007 (Committee Member)
L'Universite de Pau

Samrajit Chakraborty, M.S., 2007 (Committee Member)
UT-DGS

Sanjay Sood, M.S., 2007 (Supervisor)
Estimation of Q from seismic refractions data

Reeshidev Bansal, Ph.D., 2007 (Supervisor)
Seismic Characterization of Naturally Fractured Rerservoirs

Gregory Young, M.S., 2007 (Supervisor)
Effective Porosity Estimation from 3D Seismic: Marco Polo Field

Chandan Kumar, Ph.D., 2006 (Co-supervisor)
UT-DGS

Jason Gumble, Ph.D., 2006 (Committee Member)
UT-DGS

Mark Buursink, Ph.D., 2006 (Committee Member)
Boise State University

Joost Van der Noot, M.S., 2005 (Co-supervisor)
Delft University of Technology

Teresa Gomez, M.S., 2005 (Committee Member)
UT-DGS

Dhananjay Kumar, Ph.D., 2005 (Supervisor)
Analysis of multicomponent seismic data from the Hydrate Ridge, offshore Oregon

Armando Sena, Ph.D., 2004 (Co-supervisor)
UT-DGS

Jason Stine, M.S., 2004 (Committee Member)
UT-DGS

Paul Zwartjes, Ph.D., 2004 (Committee Member)
Delft University of Technology

Heidi Poot, Ph.D., 2003 (Co-supervisor)
Delft University of Technology

Chengshu Wang, Ph.D., 2003 (Co-supervisor)
UT-DGS

Gijs Meek, M.S., 2003 (Co-supervisor)
Delft University of Technology

Imtiaz Ahmed, Ph.D., 2003 (Committee Member)
UT-DGS

Matthew Morris, M.S., 2003 (Committee Member)
UT-DGS

Omar Londono, Ph.D., 2003 (Committee Member)
UT-Dept of Petroleum Engineering

Anubrati Mukherjee, Ph.D., 2002 (Co-supervisor)
UT-DGS

Abdul-Aziz Saleh Alaslani, Ph.D., 2001 (Co-supervisor)
UT-DGS

Saleh Mohammad Al-Saleh, M.S., 2001 (Co-supervisor)
UT-DGS

Junru Jiao, Ph.D., 2001 (Committee Member)
UT-DGS

Jean-Paul Van Gestel, Ph.D., 2000 (Committee Member)
UT-DGS

Faqi Liu, Ph.D., 1999 (Co-supervisor)
UT-DGS

Viramaditya Sen, Ph.D., 1998 (Committee Member)
UT-DGS

Mahesh Rajagopalan, M.S., 1998 (Committee Member)
UT-Dept of Electrical & Computer Engineering

Mehmet Tanis, Ph.D., 1998 (Committee Member)
UT-DGS

Ganyuan Xia, Ph.D., 1997 (Co-supervisor)
UT-DGS

Carlos Calderon-Macias, Ph.D., 1997 (Co-supervisor)
UT-DGS

Faruq Akbar, Ph.D., 1997 (Co-supervisor)
UT-DGS

Eddy Luhurbudi, M.A., 1997 (Co-supervisor)
UT-DGS

Fernando Campozana, Ph.D., 1997 (Committee Member)
UT-Dept of Petroleum Engineering

Raghu Chunduru, Ph.D., 1996 (Co-supervisor)
UT-DGS

Setiyono Kriyanti, M.S., 1996 (Co-supervisor)
UT-DGS

Duk Kee Lee, Ph.D., 1996 (Committee Member)
UT-DGS

Michael Jervis, Ph.D., 1993 (Committee Member)
UT-DGS

Warren Wood, Ph.D., 1993 (Committee Member)
UT-DGS

Mehmet Tanis, Ph.D., 1989 (Co-supervisor)
UT-DGS

Jiao Xue (Co-supervisor)
Visiting PhD Student from the Institute of Geophysics, China University of Geosciences. Ent. Fall ‘11, Visiting Scholar. Anisotropy parameter estimation and inversion for reservoir characterization

Travis Richards (Supervisor)

Robert Brown (Supervisor)

Manasij Santra (Supervisor)


“Critical aspects of numerical simulation of seismic wave propagation”, International Conference on theoretical and computational acoustics, Texas A&M University, College Station, March 2014. (2014)

“Seismic fracture characterization”, PEMEX oil company,, Viallehermosa, Mexico, February, 2014. (2014)

“Subsurface Imaging: Challenges and Opporunties”, INSPIRE Lecture, University of Tirupati, January, 2014., (2014)

“Bayesian Geophysical Inversion: imposing constraints and uncertainty quantification”, keynote lecture, international conference statistics 2013,, C. R. Rao institute of advanced mathematica, computer science and statistics,, University of Hyderabad, December 2013. (2013)

"Seismic inversion and Uncertainty Quantification for reservoir characterization", Cairn Energy, Gurgaon, India, December 9, 2011. (2011)

"Challenges in computational seismology: 4th paradigm of subsurface imaging", National Geophysical Research Institute Golden Jubilee, Hyderabad, India, October 12, 2011. (2011)

"Some practical aspects of numerical simulation of seismic wave propagation", Exxon-Mobil Research Center, Houston, TX, August 2011. (2011)

"Some practical aspects of numerical simulation of seismic wave propagation", BP Research Center, Houston, TX, August 2011. (2011)

"Meta-heuristics for uncertainty characterization in geophysical inversion", key-note speech in the session on soft-computing applications in geophysics,, AOGS 2011 conference, Taipei, Taiwan, August 2011. (2011)

"Computational methods for forward and inverse problems of seismology", Indian School of Mines, Dhanbad, India, August 2011. (2011)

"Seismic methods for subsurface characterization", Central institute of mining and fuel research, Dhanbad, India, August 2011. (2011)

“Computational methods for forward and inverse problems of seismology”, Indian Institute of Science Education and Research, Kolkata, India, August 2011 (2011)

“Seismic Inversion: computational challenges”, National Geophysical Research Institute, India, July (2011)

“Critical issues related to numerical simulation of wave propagation”, SEG summer research workshop, Quebec City, Canada, June (2011)

“On some practical aspects of numerical simulation of seismic wave propagation”, KAUST-IAMCS workshop on Multi-scale modeling, Advanced discretization techniques, and simulation of wave propagation, King Abdullah University of Science and Technology, May (2011)

“Full waveform inversion for reservoir characterization”, BGP Chinese National Oil Company, Beijing, China, March (2011)

“Wave propagation in fractured porous media”, China University of Petroleum, Beijing, China, March (2011)

“Use of priors and hyper-priors in seismic inversion”, workshop on seismic exploration: current status and future directions, King Abdullah University of Science and Technology, Jan (2010)

“Inverse methods, geostatistics and neural networks for seismic reservoir characterization”, SPG Dehradun, India, Dec (2010)

“Seismic inversion for reservoir characterization: some critical issues”, Department of Geophysics, Stanford University, California, May (2010)

“Use of prior and hyper-prior in seismic inversion for reservoir characterization”, Key-note speech, SPG Conference, Hyderabad, India, February (2010)

"Role of scientific societies in promoting science and technology", Key-note speech, SPG Conference, Hyderabad, India, February (2010)

"Constrained pre-stack waveform inversion", Western-Geco/Schlumberger Reservoir Services, Houston, Texas (2005)

"Free Gas and Gas Hydrate Saturation from multi-component seismic data from offshore Oregon", Rice University, Houston, Texas (2005)

"Free Gas and Gas Hydrate Saturation from multi-component seismic data from offshore Oregon", Edger Forum meeting, Austin, TX (2005)

"Seismic Inversion: State of the art", SPG Kolkata chapter, Kolkata, India (2005)

"Seismic modeling of fractured reservoirs", SIAM annual meeting, Portland, OR (2004)

"Seismic waveform inversion and characterization of gas hydrates offshore Oregon", Department of Geological Sciences, Indiana University, Bloomington, Indiana (2004)

"Seismic imaging in heterogeneous, anisotropic media", Department of Geological Sciences, Indiana University, Bloomington, Indiana (2004)

"Seismic Inversion for reservoir characterization", Department of Earth Sciences, Memorial University of Newfoundland, Newfoundland (2004)

"Analysis and interpretation of OBS and streamer data from Hydrate Ridge, offshore Oregon", EDGER forum meeting, University of Texas at Austin, Austin, Texas (2004)

"Seismic waveform inversion: Current status and future directions", Keynote address, Society of Petroleum Geophysicists (SPG) conference, Hyderabad, India (2004)

"Seismic Modeling of fractured reservoirs", Industrial Associates meeting, Institute of computational and engineering sciences, The University of Texas at Austin, Austin, Texas (2003)

"Gas Hydrates: their resource potential and geophysical characterization", Institute for Geophysics, UNAM, Mexico City, Mexico (2003)

"Pre-stack Seismic waveform inversion: current status and future directions", Mexican Institute of Petroleum (IMP), Mexico City, Mexico (2003)

"Gas Hydrates: their resource potential and geophysical characterization", Mexican Institute of Petroleum (IMP), Mexico City, Mexico (2003)

"Synthetic Seismograms in layered fractured media", FRACCITY annual meeting, Jackson Hole, Wyoming (2003)

"Pre-stack inversion and anisotropic velocity analysis", Jason Geosystems, Rotterdam, The Netherlands (2003)

"Migration velocity estimation by non-linear optimization", Society of Industrial; and Applied Math conference on mathematical and computational issues in geoscience, (2003)

"Estimation of Vp and Vs of shallow sediments offshore Oregon: Implication towards the distribution of gas hydrates", Petrotech Conference, New Delhi (2003)

"Gas Hydrates: their resource potential and geophysical characterization", Prof. Jagdeo Singh Memorial Lecture at Indian School of Mines, Dhanbad (2003)

"Gas Hydrates: their resource potential and geophysical characterization", Society of Petroleum Geophysicists, Kolkata chapter, (2003)

Geophysical Inversion - An overview, Schlumberger Oilfield Services, Houston, Texas (2002)

Rock property estimation from reflection seismic data, Shell Oil Company, Houston, Texas (2002)

Techniques for pre-stack waveform inversion, , R&D Division, Western Geco, Houston, Texas (2002)

Waveform inversion for reservoir characterization, BP, Houston, Texas (2002)

Pre-stack inversion with adaptive regularization, Society of Petroleum Geophysicists meeting, Mumbai, India (2002)

Seismic Processing in transversely isotropic media: the tau-p approach, Section Mining Engg and Applied Geophysics, Delft University of Technology, The Netherlands (2001)

Pre-stack inversion: Current status and future directions, SBGF meeting, Bahia, Salvador (2001)

Pre-stack inversion: Isotropy and Transverse Isotropy, EDGER Forum, University of Texas at Austin, Austin, Texas (2001)

Air-borne GPR for the detection of underground facilities, International workshop on GPR, TNO, The Netherlands (2001)

Integrated reservoir characterization, Western Geophysical , Houston, Texas (2000)

Integrated reservoir characterization, BP, Houston, Texas (2000)

Inverse Problems and uncertainty estimation in Geophysics, TICAM, UT , Austin, Texas (2000)

Seismic waveform inversion: from isotropy to anisotropy, Shell Oil Company, Houston, TX (2000)

Normal moveout and Seismic waveform inversion in transversely isotropic media, Conoco, Ponca City, Oklahoma (2000)

Parameter Estimation in Anisotropic Media, Phillips Oil Company, Barttlesville, Oklahoma (2000)

Free surface multiple attenuation in reflection seismic data, ONR Broadband Signal Processing Working Group Meeting, Applied Research Laboratory, University of Texas at Austin, Austin, Texas (1999)

Seismic Waveform Inversion and Tomography: Examples of ill-posed geophysical inverse problems, PGS Seres, Houston, Texas (1999)

Processing of multi-component OBC data, PGS , Houston, Texas (1999)

Geophysical Inversion and Uncertainty Estimation, National Research Council Workshop on 'How uncertainty is treated in ocean science models?", National Academy of Sciences, Washington, D.C. (1999)

Inverse Problems, Statistics and a touch of philosophy, UTIG seminar, (1999)

Free surface multiple attenuation in the plane wave domain, Upstream Strategic Research Division, Mobil Oil Company, Dallas, Texas (1999)

Application of active source Seismology in imaging of subsurface structures, DARPA Geophysics Seminar, (1999)

Geophysical Inversion: Application to hydrocarbon exploration, DOE Workshop on Global inversion of Geophysical Data, (1999)

Geophysical Inversion : Theory and Practice, Southwest Research Institute, San Antonio, Texas (1998)

AVO and Seismic Inversion in he Plane Wave Domain, Mobil Strategic Research Center, Dallas, TX (1998)

AVO and Seismic Lithology, Oil and Natural Gas Commission, Calcutta, India (1998)

AVO and Seismic Waveform Inversion in the Plane Wave Domain: Application to Gas Hydrate Data, Society of Petroleum Geophysicists, Chennai, India (1998)

Seismic Wave Propagation Modeling: Current Status and Future Trends, Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas (1997)

Practical Approaches to Uncertainty Estimation in Geophysical Inversion, Sociedade Brasileira de Geofisica, Sao Paulo, Brazil (1997)

"To Bayes or not to Bayes", PPPG, Federal University of Bahia, Salvador, Brazil (1997)

Mapping of Elastic properties of gas hydrates, Amoco EPTG, Tulsa, OK (1997)

Global Optimization Methods and Migration Velocity Analysis, Oil and Natural Gas Commission, Calcutta, India (1996)

"To Bayes or not to Bayes", Society of Petroleum Geophysicists, Oil and Natural Gas Commission, Dehradun, Indi (1996)

Inverse methods and uncertainty estimation in geophysics, Western Atlas Wireline Service, Houston, TX (1996)

Gibbs' sampler and its application to geophysical inversion, SIAM meeting on Geophysical Inverse Problems in Geophysics, Fish Camp, CA (1995)

Optimization methods for automatic velocity estimation, SIAM meeting on Geophysical Inverse Problems in Geophysics, Fish Camp, CA (1995)

Nonlinear geophysical inversion, Department of Petroleum and Geosystems Engineering, University of Texas at Austin, Austin, TX (1995)

Nonlinear geophysical inversion, Indian Institute of Technology, Kharagpur, India (1994)

Global optimization methods in geophysical inversion and Seismic migration and modeling in 3-D, National Geophysical Research Institute, Hyderbad, India (1994)

Nonlinear geophysical inversion, Indian School of Mines, Dhanbad India (1994)

Nonlinear optimization methods in geophysics, Delft University of Technology, The Netherlands (1994)

Nonlinear optimization methods in geophysics, University of Potsdam, GeoForschungs Zentrum, Potsdam, Germany (1994)

Global optimization methods in geophysical inversion, University of Utrecht, The Netherlands (1994)

Bayesian inference, Gibbs' sampler and uncertainty estimation in nonlinear geophysical inversions, Department of Computational and Applied Mathematics, Rice University, Houston, Texas (1993)

Geophysical inversion using global optimization, Society of Industrial and Applied Mathematics Conference on Mathematical and Computational Issues in the Geosciences, Houston, Texas (1993)

High resolution shallow water 3-D survey and inversion for geophysical parameters, Acoustical Society of America, Ottawa, Canada (1993)

Nonlinear inversion of geophysical data, Department of Geophysics, Center for Tectonophysics, Texas A&M University, (1992)

Genetic Algorithms, Naval Research Laboratory, Stennis Space Center, MS (1992)

Modeling of wave propagation Los Angeles Basin, CICESE, Mexico (1990)

Multifold path integral synthetic seismograms, Seismological Laboratory, California Institute of Technology, Pasadena, CA (1987)

Kirchhoff-Helmholtz reflection seismograms, SOHIO Petroleum Company, Dallas, TX (1985)

"Global optimization methods in geophysical inversion" to be entered

"Seismic modeling, migration, and inversion" (one-week short course taught at companies) to be entered

"Seismic modeling and inversion: the state of the art" to be entered

"Seismic inversion: theory and practice" to be entered