f An interactive approach to macro model estimation

Advanced seismic processing techniques are elastic and depth-oriented. With elastic, depth-oriented processing a more accurate image of the subsurface can be obtained than with acoustic time-oriented processing. Properties of the subsurface can he divided into properties that mainly influence the propagation of seismic waves (macro properties) and properties accounting for reflection of these waves (detail). If the macro properties of the sub surface are known, the propagation effects can be removed from the data, yielding a depth image of the detail. Since the elimination of propagation effects is a major processing goal, a clear understanding of the macro properties of the subsurface is necessary.