We have extended the method of stationary spiking deconvolution of seismic data to the
context of nonstationary signals in which the nonstationarity is due to attenuation processes …

We consider the problem of constructing a wave extrapolation operator in a variable and
possibly anisotropic medium. Our construction involves Fourier transforms in space …

We compared several families of algorithms for recursive integral time-extrapolation (RITE)
algorithms for waves in isotropic and anisotropic media. These methods allow simulating …

Attenuation of seismic waves needs to be taken into account to improve the accuracy of
seismic imaging. In viscoacoustic media, reverse time migration (RTM) can be performed …

Forward modeling of seismic data and reverse time migration are based on the time
evolution of wavefields. For the case of spatially varying velocity, we have worked on two …

Reverse time migration (RTM) relies on accurate wave extrapolation engines to image
complex subsurface structures. To construct such operators with high efficiency and …

We evaluated a new spectral method and a new finite-difference (FD) method for seismic-
wave extrapolation in time. Using staggered temporal and spatial grids, we derived a wave …

We design post-propagation filters using deep learning for overcoming the numerical
dispersion of finite-difference wave extrapolation. We train the network with a given velocity …

Spectral methods are fast becoming an indispensable tool for wavefield extrapolation,
especially in anisotropic media because it tends to be dispersion and artifact free as well as …

The importance of seismic imaging is being impetrative in the petroleum industry because of
exploiting minor hydrocarbon reservoirs traps in highly tectonic and complex structures …