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Full-waveform inversion of ground-penetrating radar data and its indirect joint petrophysical inversion with shallow-seismic data

Qin, Tan ORCID iD icon 1
1 Geophysikalisches Institut (GPI), Karlsruher Institut für Technologie (KIT)

Abstract:

Both full-waveform inversion (FWI) of ground-penetrating radar (GPR) and shallow-seismic data have received special attention in the past decade because they allow the reconstruction of seismic and electromagnetic (EM) properties at high resolution. Research on the two FWIs includes: FWI of single geophysical data and joint FWI of multiple geophysical data. In this dissertation, I focus on GPR FWI in the former and joint petrophysical inversion (JPI) in the latter.

In GPR FWI, the high computational costs and frequency-independent assumption are two problems that limit its development. To reduce computational costs, I apply a subset FWI (SFWI) to multi-offset GPR data. SFWI uses the data simulated on a model subset to approximate the data simulated on an entire model. Thus it obtains theoretical speedup and memory saving factor equal to the size ratio of the model and its subset. SFWI has higher or lower than expected speedups when combined with the source parallelization and model domain parallelization, respectively. The model subset depends on the illumination of the acquisition geometry used, for which I give rules of thumb by quantifying its effect on the simulation and inversion. ... mehr


Volltext §
DOI: 10.5445/IR/1000152587
Veröffentlicht am 22.11.2022
Cover der Publikation
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
Publikationstyp Hochschulschrift
Publikationsdatum 22.11.2022
Sprache Englisch
Identifikator KITopen-ID: 1000152587
Verlag Karlsruher Institut für Technologie (KIT)
Umfang iv, 105 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Physik (PHYSIK)
Institut Geophysikalisches Institut (GPI)
Prüfungsdatum 04.11.2022
Schlagwörter Full-waveform inversion, joint inversion, ground-penetrating radar, shallow-seismic method
Relationen in KITopen
Referent/Betreuer Bohlen, Thomas
Klotzsche, Anja
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