To investigate wavefield depth extrapolation using the full-wave equation, we have derived
a new depth extrapolation scheme for migration using functions of the vertical wavenumber …

The strong impedance interfaces of the sea surface and seabed cause significant multiples
and ghost wavefield in marine seismic data. The finite-difference method of the two-way …

海面与海底存在的**波阻抗界面, 导致海洋地震资料中普遍发育多次波与鬼波.
广泛使用的双程波方程有限差分**演方法无法分离不同阶次的多次波及鬼波 …

In reverse time migration, if sources or receivers are buried at certain depths, the
interference between the primary wave and the free‐surface reflection causes losing …

Seismic data recorded using a marine acquisition geometry contain both upgoing reflections
from subsurface structures and downgoing ghost waves reflected back from the free surface …

A gradient preconditioning approach based on transmitted wave energy for least-squares
reverse time migration (LSRTM) is proposed in this study. The gradient is preconditioned by …

We introduce a practical vector operator of reflection demigration of PP and PS waves, and
develop a vector elastic least-squares reverse-time migration (LSRTM) method for PP and …