CWP Graduate Research Assistants
(Listed alphabetically by last name)
Advisor: Paul Sava
Alicia’s research projects encompass seismic data processing and real-time GPR data processing.
Yogesh uses Kirchhoff migration for diffraction imaging in anisotropic media. He is currently working on estimating anisotropy parameters from diffractions.
Tong’s research focuses on Q-related processing in anisotropic media. With two developed viscoelastic VTI propagators based on GSLS model (for inversion) and Kjartansson’s constant-Q model (for imaging), he has conducted FWI for attenuation estimation, and demonstrated the necessity of understanding Q-anisotropy by applying Q-compensated time-reversal imaging for microseismic source characterization.
Samuel is researching how to collect full coverage seismic data from asteroids and small planetary bodies with a laser doppler vibrometer. His work could one day provide planetary scientists with much needed information on the internal structures of asteroids, which can validate or discredit solar system formation hypotheses. Samuel’s project is funded by NASA.
Oscar Jarillo Michel
Oscar Jarillo Michel CV
Advisor: Ilya Tsvankin
Oscar uses full-waveform inversion to estimate the location, mechanism, and origin time of earthquakes as well as the velocity parameters in anisotropic media.
Alex’s passion lies in making frontier seismic methods (processing, imaging, and inversion) applicable for practical energy exploration and production. His research focus is to implement Marchenko imaging to 3D and field data, and to explore the geophysical applications of the Marchenko framework.
The focus of Colton’s research is localized joint inversion of seismic and electromagnetic data with reservoir monitoring applications.
Vladimir’s research is focused on image-guided migration-based travel time tomography and waveform inversion for acoustic TI media.
Jack’s research involves (a) seismic monitoring during hydraulic fracturing, (b) a unified interpretation of both the elastic nonlinearity and slow dynamics (recovery of rocks) in resonance experiments, (c) evolution of induced seismicity (geothermal) and its insight on microearthquake triggering mechanism, hydraulic fracturing efficiency and seismic hazards assessment & control.
Ivan’s primary focus is to capture the full strain tensor from distributed acoustic sensing (DAS) data acquired using judiciously chosen and spatially variable optical fiber geometry. He also engages in elastic wavefield imaging and tomography with accurate wavefield extrapolation technique using both stress and displacement data derived from his multicomponent DAS data measurements.
Advisor: Ilya Tsvankin
Iga examines different sources of uncertainty in the seismic imaging and develop understanding how uncertainty propagates from a velocity model to a seismic image. The expected outcome is to provide a scheme for quantitative uncertainty assessment in the seismic imaging.
Aaron is interested in applying a rapid and efficient shape reconstruction technique for time-lapse monitoring in disordered media. The technique offers several advantages compared to conventional methods, including no required a priori knowledge of the time-lapse change, no weak scattering assumption, no “up-down” decomposition of the wave field, and no restriction on the acquisition geometry.
Thomas is currently exploring alternatives for acquiring land seismic data without touching the ground surface. The specific focus of his current research is on the feasibility of using stereo vision and so-called video motion magnification for deducing subtle ground motion from video.
In order to obtain an improved estimation of the subsurface physical properties within fewer iterations, Daniel utilizes imaging operators derived from the wavefield energy norm for least-squares migration and tomography. Such operators exploit polarization and directionality from the extrapolated wavefields to mitigate artifacts that retard convergence towards the desired subsurface model.
Patipan (Mickey) Saengduean
Patipan Saengduean CV
Advisor: Roel Snieder
Patipan’s research interests are microseismisity and seismic interferometry. He is currently working on the applications of the virtual seismic method (VSM) to obtain wave responses (Green’s function) and to hopefully obtain geo-mechanical properties within different source scenarios (e.g., subduction earthquakes and micro-earthquakes induced by fluid injections).
Harpreet Singh Sethi
Advisor: Ilya Tsvankin
Sagar is currently working on Full Waveform Inversion(FWI) for Reservoir Characterization with the idea to constraint FWI work-flow using rock physics relationship with elastic properties to provide very high resolution image in depth domain. He is currently working with Elastic VTI model and will extend it to an elastic orthorhomic model in future. He also intends to do targeted reservoir parameter inversion using local solvers in time domain.