Full waveform inversion comparison of conventional and broadband marine seismic streamer data, NW Shelf Australia

Jang, Ugeun; Lumley, David

doi:10.1071/aseg2015ab001

Cited by 3 publications

(1 citation statement)

References 9 publications

(7 reference statements)

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“…In order to monitor transient subsurface fluid‐flow changes caused by the microbubble‐water injection, we estimate P‐wave velocity change over time following the time‐lapse acoustic full waveform inversion approach (Jang & Lumley, 2015; Kamei & Lumley, 2017). P‐wave velocity is sensitive to changes in rock properties such as porosity, and also fluid‐related parameters such as gas‐fluid saturation, pore‐pressure and fluid temperature (Mavko et al., 1998; Santamarina et al., 2001).…”

Section: Methodsmentioning

confidence: 99%

Seismic Time‐Lapse Monitoring of Near‐Surface Microbubble Water Injection by Full Waveform Inversion

Nakata

Jang

Lumley

et al. 2022

Geophysical Research Letters

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Monitoring time‐lapse changes in subsurface physical properties of the near‐surface critical zone is increasingly important with respect to climate change, environmental conservation/remediation, geohazard mitigation, and geotechnical engineering activities. Innovative controlled‐source cross‐well seismic monitoring surveys combined with full waveform inversion analysis enable us to map small and highly localized changes by repeatedly scanning the subsurface between borehole sensors at depth. In the Kanto Basin, Japan, we successfully monitor the dynamic transient fluid‐flow effects of the subsurface injection of microbubble water, which is of interest for soil contamination remediation and preventing earthquake liquefaction. The fluid migration is detected by observing P‐wave velocity changes (∼1%) within a very thin (∼1 m) sediment layer at a depth of ∼25 m. The injected microbubble water of the differential physical properties (temperature) is observed to follow geological and hydrologic preferential fluid‐flow paths rather than diffusing equally in all directions away from the injection well.

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