Incorporating Dip Corrections in Velocity Analysis Using Constant Velocity Stacks
, by Paul Fowler
A method is described for incorporating dip moveout moveout correction in constant velocity stacks of common midpoint seismic data without prior specification of a velocity function. The kinematic dip moveout correction takes a particularly simple form in this velocity space. Velocity analysis can then be performed on the resulting three-dimensional data cube after dip correction. A stacked section corresponding to a specified velocity function can be extracted by interpolation between dip corrected constant velocity stacks. The method is limited to windows over which lateral velocity variation is small. If lateral variation is small enough over a sufficiently wide window of data, a migration step may be added at little additional cost, also before the velocity function must be specified.
STANFORD