CONTACT 

Associate Professor Jeffrey Shragge

Currently at:
Center for Wave Phenomena
Geophysics Department
Colorado School of Mines
924 16th Street, Room 260K
Golden, CO 80401-1877, USA
Email: jshragge [AT] mines.edu

Formerly:
School of Earth Sciences and School of Physics and Astrophysics
University of Western Australia
M004, 35 Stirling Highway
Crawley, WA 6009, Australia

TEACHING

Courses (and Co-teaching):

COURSE	DESCRIPTION	UNIVERSITY
MATH348	Advanced Engineering Mathematics (2018-S)	CSM
GPGN404	Digital Signal Processing (2017-F)	CSM
GEOS5503	Petroleum Resources (2015-W)	UWA
GEOP4002	Geophysics Field Camp (2016-S)	UWA
SHPC4001	Principles of Scientific Computation (2016-S)	UWA
SHPC5001	High-Performance Scientific Computing (2016-W)	UWA

For prospective students

There are a number of opportunities for motivated students to find projects at the undergraduate, MSc or PhD level.  Anyone interested can inquire by email on available positions and technical topics that are currently being investigated.  

RESEARCH OVERVIEW

Basic research

3D acoustic and elastic wave propagation, 3D/4D velocity inversion, 

3D/4D Reverse-time migration (RTM), wave-equation migration,

rock physics, computational geometry and differential meshing

Applied research

Near-surface geophysics: Ground penetrating radar, magnetics, conductivity profiling, resistivity, seismic reflection/refraction 

SELECTED PUBLICATIONS

Recent Publications (2013-18)

de Souza, R., D.E. Lumley, J. Shragge, A. Davolio, and D.J. Schiozer, 2018, Combining Time-lapse Seismic and Production Data for Systematic Reservoir Model Classification and Assessment: Accepted in the Journal of Geophysics and Engineering.

Johnson, J., M. Merrilees, J. Shragge and K. van Wijk, 2018, All-Optical Laser-Ultrasound and Photoacoustic Imaging of Calcified Atherosclerotic Plaque: Accepted in Photoacoustics.

Witten, B., and J. Shragge, 2017, Microseismic Image-domain Velocity Inversion: Marcellus Shale Case Study: Geophysics, 82, no. 6, KS99-KS112.

Witten, B., and J. Shragge, 2017, Image-domain Velocity Inversion and Event Location for  Microseismic Monitoring: Geophysics, 82, no. 5, KS71-KS83.

Shragge, J. and B. Tapley, 2017, Solving the Tensorial 3D Acoustic Wave Equation: A Mimetic Finite-Difference Time-Domain Approach: Geophysics, 82, no. 4, T183-T196.

Shragge, J., D. Lumley, N. Issa, T. Hoskin, A. Paterson and J. Green, 2017, Surveying Batavia’s Graveyard: Geophysical controlled experiments and subsurface imaging of archaeological Sites on an Indian Ocean coral island: Geophysics, 82, no. 4, B147-B163.

Johnson, J., J. Shragge and K. van Wijk, 2017, Non-confocal all-optical laser-ultrasound and photoacoustic imaging system for angle-dependent deep tissue imaging: Journal of Biomedical Optics, 22, 4, 041014.

Souza, R., D. Lumley and J. Shragge, 2017, Estimation of reservoir fluid saturation from 4D seismic data: Effects of noise on seismic amplitude and impedance attributes: Journal of Geophysical Engineering, 14, 51-68.

Shragge, J., 2016, Acoustic Wave Propagation in Tilted Transversely Isotropic (TTI) Media: Incorporating Topography: Geophysics, 81, no 5., C265-C278.

Shragge, J., T.E. Blum, K. van Wijk and L. Adam, 2015, Full Wavefield Modeling and Reverse-time Migration of Laser Ultrasound Data: A Feasibility Study: Geophysics, 80, no. 6, D553-D563.

Witten, B., and J. Shragge, 2015, Extended Wave-equation Imaging Conditions for Passive Seismic Data: Geophysics, 80, no. 6, WC61-WC72.

Shragge, J., 2014, Solving the 3D Acoustic Wave-equation on Generalized Structured Meshes: A FDTD Approach: Geophysics, 79, no. 6, T363-T378.

Spratt, J., M.C. Dentith, S. Evans, A.R.A. Aitken, M. Lindsay, J.A. Hollis, I.M. Tyler, A. Joly, and J. Shragge, 2014, A Magnetotelluric Survey Across the Kimberley Craton, Northern Western Australia, WA Department of Mines and Petroleum, Report 136.

Shragge, J., 2014, Reverse-time migration from topography: Geophysics, 79, no. 4, P1-P12.

Yang, T., J. Shragge and P. Sava, 2013, Illumination compensation for image-domain wavefield tomography: Geophysics, 78, no. 5, U65-U76.

Saul, M., D. Lumley and J. Shragge, 2013, Modeling the pressure sensitivity of uncemented sediments using a modified effective medium theory: Incorporating grain relaxation and porosity effects: Geophysics, 78, no. 5, D327-D338.

Shragge, J., T. Yang and P. Sava, 2013, Time-domain image-domain tomography using adjoint-state methods: Geophysics, 78, no. 4, A29-A33.

Shragge, J. and D. Lumley, 2013, Time-lapse wave-equation migration velocity analysis: Geophysics, 78, no. 2, S69-S79.

Weiss, R. and J. Shragge, 2013, Solving the 3D anisotropic elastic wave equation on Parallel GPU Devices: Geophysics,78, no. 2, F7-F15.

Shragge, J., 2013, Elliptical Moveout Operator for Data Regularization in Azimuthally Anisotropic Media: Geophysics, 78, no. 1, C1-C10.

Manuscripts Submitted or in Preparation

Potter, T., J. Shragge and D. Lumley, expected 2018, Performance and Stability of the Double Absorbing Boundary method: Submitted to Geophysics.

Bustamante, J., J. Shragge and D. Lumley, expected 2018, A Comparison of Rock Physics Models for Stress-related Azimuthal Anisotropy in Seismic Data: submitted to Exploration Geophysics.

Rocha, D., P. Sava, J. Shragge, and B. Witten, expected 2018, 3D Passive Wavefield Imaging using the Energy Norm: to be submitted to Geophysics. 

Hoskin, T., M. Dentith, J. Shragge, A. Jones, K. Regenauer-Lieb and P.E. Malin, expected 2018, Implications of a Constrained Magnetotellurics Traverse on the Deep Structure of the North Perth Basin, Western Australia: to be submitted to Tectonics.

Girard, A. and, J. Shragge, expected 2018, Automated Processing Strategies for Ambient Seismic Data: to be submitted to Geophysics.

Shragge, J., J. Bourget, D. Lumley, T. Wilson, B. Witten, T. Miyoshi, and T. Potter, expected 2018, The Western Australia Modelling (WAMo) Project. Part 1: Geomodel Building, to be submitted to Geophysics.

Shragge, J., J. Bourget, D. Lumley, T. Wilson, B. Witten, T. Miyoshi, and T. Potter, expected 2018, The Western Australia Modelling (WAMo) Project. Part 2: Geophysical Validation: to be submitted to Geophysics.

Recent Conference Abstracts (2013-18)

Souza, R., D. Lumley, J. Shragge, A. Davolio and D. Schiozer, 2018, Analysis of Time-Lapse Seismic and Production Data for Systemic Reservoir Model Classification and Assessment: presented at AEGC 2018.

Rocha, D., P. Sava, J. Shragge, and B. Witten, expected 2018, 3D Passive Wavefield Imaging using the Energy Norm: EAGE. 

Shragge, J., 2017, Tensorial Elastodynamics for Isotropic Media on Vertically Deformed Meshes: 90th Annual International Meeting, SEG, Expanded Abstracts, 36, 4034-4038.

Rocha, D., J. Shragge and P. Sava, 2016, Passive wavefield imaging using the energy norm: 89th Annual International Meeting, SEG, Expanded Abstracts, 35, 2580-2585.

Witten, B., and J. Shragge, 2016, Full-wavefield tomography for seismic monitoring: 89th Annual International Meeting, SEG, Expanded Abstracts, 35, 2513-2517.

Girard, A., and J. Shragge, 2016, Extracting body waves from ambient seismic recordings: 89th Annual International Meeting, SEG, Expanded Abstracts, 35, 2715-2719.

Adekoya, T., G. McGrath, M. Leopold, J. Shragge, A. Challis, J. Stevens, and B. Miller, 2015, Time-lapse Geophysical Monitoring of the Subsurface Hydrology at Kings Park, Western Australia: European Geophysical Union, GEU2015-8396-1.

Adam, L., J. MacFarlane, K. van Wijk, J. Shragge and K. Higgs, 2015, Monitoring the effects of CO2 injection on carbonate-cemented sandstones with elastic waves: 88th Annual International Meeting, SEG, Expanded Abstracts, 34.

Witten, B., and J. Shragge, 2015, Passive extended imaging conditions for microseismic velocity QC, 88th Annual International Meeting, SEG, Expanded Abstracts, 34.

Adam L., J. MacFarlane, K. van Wijk, J. Shragge and K. Higgs, 2015, Monitoring how Carbonate Cement Dissolution Affects Dissolution Properties due to CO2 Injection: 3rd International Workshop on Rock Physics.

Johnson, J., J. Shragge, and K. van Wijk, 2015, Image reconstruction of multi-channel photoacoustic and laser-ultrasound data using reverse-time migration: SPIE Annual General Meeting.

Witten, B. and J. Shragge, 2015, Extended imaging conditions for passive seismic data: ASEG General Meeting.

Witten, B. and J. Shragge, 2014, Elastic velocity updating through Image-Domain Tomographic Inversion of Passive Seismic Data: AGU Annual General Meeting.

Spratt J., M.C. Dentith, S. Evans, A. Aitken, M. Lindsay, J.A. Hollis, I.M. Tyler, A. Joly, and J. Shragge, 2014, A magnetotelluric survey across the Kimberley Craton, northern Western Australia: 22nd EM Induction Workshop.

Weiss, R., J. Shragge, 2014, Adding GPU-Acceleration to open-source 3D Elastic Wave Modelling: GPU Technology Conference, S4599.

Nakpathom, A., J. Shragge, C. Boonyasiriwat and R. Kamei, 2014, Visco-acoustic Full Waveform Inversion for Estimation of Seismic Velocity and Quality Factor: ANSCSE18, Si Racham Thailand 25.

Saul, M., D. Lumley and J. Shragge, 2013, Modeling the Pressure Sensitivity of Uncemented Sediments Using a Modified Effective Medium Theory: Proceedings of the 75th Annual International Meeting, EAGE, Expanded Abstracts.

Shragge, J., T. Yang and P. Sava, 2013, Time-lapse velocity inversion through image-domain tomography: 23rd International Conference and Exhibition, ASEG, Expanded Abstracts.

Deeks, J., D. Lumley and J. Shragge, 2013, High-performance computational modelling of 3D seismic wavefields Offshore NW Australia: 23rd International Conference and Exhibition, ASEG, Expanded Abstracts.