Local angular Hessian can be used to improve wave equation least square migration
images. By decomposing the original Hessian operator into the local wavenumber domain …

Due to incomplete aperture coverage and complex overburden structures, the migration
process cannot provide a true-amplitude image even though a true-amplitude propagator is …

Directional illumination analysis based on one-way wave equations has been studied
extensively; however, its inherent limitations, eg, one-way propagation, wide-angle error …

We have developed an efficient method of directional illumination analysis in the local angle
domain using local exponential frame beamlets. The space-domain wavefields with different …

Conventional seismic migrations are often suitable for structural imaging of the subsurface,
but have quantitative limitations. We proposed an imaging strategy for obtaining true …

We propose an efficient split-step local plane wave decomposition method to obtain the
local-angle domain (LAD) illumination in the frequency domain for full-wave propagators …

Localized WKBJ correction based on Local Cosine Basis (LCB) beamlet propagator is
applied in post-and pre-stack migration to study its influence on image amplitude. 2D …

Gaussian beam prestack depth migration only produces blurred images with
underestimated amplitude caused by sparse receiver sampling, narrow acquisition …

Analysis of directional character of Hessian operator leads to two new schemes for
computing inverse Hessian in angle domain. The methods modify the original explicit …

Migration can undo wave propagation effects kinematically, but not dynamically due to many
factors including geometrical spreading, transmission loss, path absorption, and acquisition …