KIT | KIT-Bibliothek | Impressum | Datenschutz

2D multi-parameter viscoelastic shallow-seismic full waveform inversion: reconstruction tests and first field-data application

Gao, Lingli; Pan, Yudi; Bohlen, Thomas

Abstract:
2D full-waveform inversion (FWI) of shallow-seismic wavefields has recently become a novel way to reconstruct S-wave velocity models of the shallow subsurface with high vertical and lateral resolution. In most applications, seismic wave attenuation is ignored or considered as a passive modelling parameter only. In this study, we explore the feasibility and performance of multi-parameter viscoelastic 2D FWI in which seismic velocities and attenuation of P- and S-waves, respectively, and mass density are inverted simultaneously. Synthetic reconstruction experiments reveal that multiple crosstalks between all viscoelastic material parameters may occur. The reconstruction of S-wave velocity is always robust and of high quality. The parameters P-wave velocity and density exhibit weaker sensitivity and can be reconstructed more reliably by multi-parameter viscoelastic FWI. Anomalies in S-wave attenuation can be recovered but with limited resolution.
In a field data application, a small-scale refilled trench is nicely delineated as a low P- and S-wave velocity anomaly. The reconstruction of P-wave velocity is improved by the simultaneous inversion of attenuation. ... mehr

Open Access Logo


Volltext §
DOI: 10.5445/IR/1000118625
Veröffentlicht am 27.04.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
Institut für Angewandte und Numerische Mathematik (IANM)
Sonderforschungsbereich 1173 (SFB 1173)
Publikationstyp Forschungsbericht/Preprint
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2365-662X
KITopen-ID: 1000118625
Verlag KIT, Karlsruhe
Umfang 24 S.
Serie CRC 1173 ; 2020/14
Projektinformation SFB 1173/2 (DFG, DFG KOORD, SFB 1173/2 2019)
Externe Relationen Siehe auch
Schlagwörter surface waves and free oscillations, waveform inversion, seismic attenuation
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page