Full waveform inversion (FWI) is proven to be a successful high-resolution velocity model building tool, when low-frequency information and long-offset data are available. Usually, the low-frequency is only available for the shallow section of the subsurface. To overcome lack of low-frequency in...
Conventional least-squares based full waveform inversion (FWI) is not suitable to construct low-wavenumber background model when recorded data is dominated by reflected energy. We present a new approach to address the challenge of building kinematically correct background model with FWI for reflection...
Full-waveform inversionImagingReflectionReflectivityVelocity analysisReflection based full waveform inversion (RFWI) is a category of approaches that employs a waveform-fitting-driven inversion process to build kinematically sound background models with reflections, which is usually a conventional full waveform...
Reflection waveform inversionReflection traveltime inversionGauss-NewtonHESSIANReflection-based inversion that aims to reconstruct the low-to-intermediate wavenumbers of the subsurface model, can be a complementary to refraction-data-driven full-waveform inversion(FWI), especially for the deep target area ...
Reflection waveform inversion (RWI) plays an important role in reconstructing this model by efficiently tracing reflection wave paths, combining reflection energy with the demigration operator to enable precise velocity updates. However, the conventional least-squares norm objective function, sensitive to ...
To invert the long-wavelength velocity from reflection-dominant, short-offset field seismic data, reflection-based full waveform inversion (RFWI) which decomposes the FWI gradient into high- and low-wavenumber components, is suggested. However, the conventional RFWI also contains high-wavenumber ...
Elastic reflection waveform inversion (ERWI) utilizes reflections to update the low and intermediate wavenumbers in the deeper part of elastic models and can provide good initial models for elastic full waveform inversion (EFWI). Although ERWI aims to mitigate the nonlinearity of inversion when ...
An image-based reflection full waveform inversion is applied to a cost function of differences between seismic data acquired over the subsurface formation and the synthetic data to update the initial velocity model. The updated velocity model enables exploring the presence of and/or assisting in the...
Cross‐correlation reflection waveform inversion based on a weighted norm of the time‐shift obtained by dynamic image warpingdoi:10.1111/1365-2478.13599Qu, YingmingDong, ShihaoZhong, TianmiaoRen, YiLi, ZizhengXing, BoshenLi, YifanGeophysical Prospecting...
Ray tracingTomographyReflection traveltime tomography has been used to describe subsurface velocity structures which, in practice, can be used as a background or initial model for pre‐stack depth migration or full waveform inversion. Conventional reflection traveltime tomography is performed by solving ...