초록 ▼

A process for depth migration of seismic wave information that has been derived from geological media that causes rapid lateral velocity variations in seismic waves. The process includes the step of decomposing wavefields recorded at the earth\s surface using Gaussian beams as basic functions. Then,

A process for depth migration of seismic wave information that has been derived from geological media that causes rapid lateral velocity variations in seismic waves. The process includes the step of decomposing wavefields recorded at the earth\s surface using Gaussian beams as basic functions. Then, according to the process, the set of Gaussian beams is extrapolated downward into the earth to obtain the subsurface wavefield. Finally, the wavefield is processed to provide depth-migrated images of subsurface reflectors.

대표청구항 ▼

A process for depth migrating common offset sections of seismic wave information that has been derived from geological media that causes lateral velocity variations in seismic waves, comprising: (a) decomposing common offset recordings of wavefields using Gaussian beams as basis functions; (b) summi

A process for depth migrating common offset sections of seismic wave information that has been derived from geological media that causes lateral velocity variations in seismic waves, comprising: (a) decomposing common offset recordings of wavefields using Gaussian beams as basis functions; (b) summing the Gaussian beams and using the summation to describe the downward extrapolation of the common offset wavefields to generate a depth-migrated extrapolated recorded field; (c) forward modeling the source fields using Gaussian beams to produce a forward modeled source field; and (d) cross-correlating the extrapolated recorded field with the forward modeled field to generate depth migrated images.