Removing the effect of noise and multiples from the seismic data.
Enhancing velocity information of subsurface.
Correct apparent reflector position in preprocessing seismic data.
As a connector to GeologyGeophysics sequence (G&G Link).
Wave move in plane and only able to travel in a straight line.
Wave can be reflected, refracted, diffracted and transmitted.
Wave can’t be attenuated by any factor.
The wave movement is a process of heat transfer.
Reflected Shear wave.
Transmitted Shear wave.
Reflected Surface wave.
Reflected Pressure wave.
Scholte wave --> Swave --> Rayleigh wave --> Love wave.
Pwave --> Swave --> Rayleigh wave --> Love wave .
Pwave --> Love wave --> Rayleigh wave --> Swave.
Pwave --> Stoneley wave --> Swave --> Scholte wave.
Amplitude decays exponentially from apex.
Phase is asymmetrical.
Frequency attenuated with depth.
Every point is the source of a secondary wave front.
These secondary wave front can propagate upward or downward.
Amplitude & phase in secondary wave front is same as the primary wave front.
The superposition of these secondary wave front will create a new wave front.
Same irrespective of depth.
Narrower as depth increase.
Broader as depth increase.
Shorter as depth increase.
Downward continuation migration.
Time section migration is equivalent with depth migration.
There is discrepancies of time and depth migration.
Time migration requires a velocity model for imaging.
Time migration better image the points position compare to depth migration.