Results 21 to 30 of about 2,936 (205)
Full Waveform Inversion Based on an Asymptotic Solution of Helmholtz Equation
Geosciences, 2023 This study considers the full waveform inversion (FWI) method based on the asymptotic solution of the Helmholtz equation. We provide frequency-dependent ray tracing to obtain the wave field used to compute the FWI gradient and calculate the modeled data.
Maxim Protasov +3 more
doaj +1 more source
Double-difference waveform inversion of 4D ocean bottom cable data: Application to Valhall, North Sea [PDF]
, 2013 Changes in reservoir properties resulting from extracting hydrocarbons and injecting fluid are critical to optimize production. These properties can be characterized using waveform inversions of time-lapse seismic data.
Fehler, Mike +4 more
core +2 more sources
An adaptive multiscale algorithm for efficient extended waveform inversion [PDF]
, 2017 Subsurface-offset extended full-waveform inversion (FWI) may converge to kinematically accurate velocity models without the low-frequency data accuracy required for standard data-domain FWI. However, this robust alternative approach to waveform inversion
Fu, Lei, Symes, William W.
core +1 more source
PyFWI: A Python package for full-waveform inversion and reservoir monitoring
SoftwareX, 2023 Full-waveform inversion (FWI) of seismic data is a technique that can be used to image the subsurface as well as to monitor time-lapse changes in the subsurface (TL-FWI).
Amir Mardan +2 more
doaj +1 more source
Time-lapse full-waveform inversion with ocean-bottom-cable data: Application on Valhall field [PDF]
, 2015 Knowledge of changes in reservoir properties resulting from extracting hydrocarbons or injecting fluid is critical to future production planning. Full-waveform inversion (FWI) of time-lapse seismic data provides a quantitative approach to characterize ...
Alison Malcolm +4 more
core +2 more sources
Full waveform inversion with extrapolated low frequency data [PDF]
, 2016 The availability of low frequency data is an important factor in the success of full waveform inversion (FWI) in the acoustic regime. The low frequencies help determine the kinematically relevant, low-wavenumber components of the velocity model, which ...
Demanet, Laurent, Li, Yunyue Elita
core +2 more sources
Waveform Energy Focusing Tomography With Passive Seismic Sources
Frontiers in Earth Science, 2022 By taking advantage of the information carried by the entire seismic wavefield, Full Waveform Inversion (FWI) is able to yield higher resolution subsurface velocity models than seismic traveltime tomography.
Yueqiao Hu +4 more
doaj +1 more source
Velocity estimation via registration-guided least-squares inversion [PDF]
, 2013 This paper introduces an iterative scheme for acoustic model inversion where the notion of proximity of two traces is not the usual least-squares distance, but instead involves registration as in image processing.
Baek, Hyoungsu +2 more
core +3 more sources
3D variable-grid full-waveform inversion on GPU
Petroleum Science, 2019 Full-waveform inversion (FWI) is a powerful tool to reconstruct subsurface geophysical parameters with high resolution. As 3D surveys become widely implemented, corresponding 3D processing techniques are required to solve complex geological cases, while ...
Zi-Ying Wang +5 more
doaj +1 more source
Remote Sensing, 2022 For the full waveform inversion, it is necessary to provide an accurate source wavelet for forwarding modeling in the iteration. The source wavelet estimation method based on deconvolution technology can solve this problem to some extent, but we find ...
Xintong Liu +6 more
doaj +1 more source