Stacking Velocity Analysis with CRS Stack Attributes

Abstract

The Common-Reflection-Surf ace (CRS) Stack has been established over the past years as an alternative to standard data-driven imaging techniques. The CRS Stack not only yields high-quality stack sections from multi-coverage reflection pre-stack data but also provides—as by-product to the stacked section— important wavefield attributes. With the knowledge of the near-surface velocity only, these attributes can be extracted from the stacking parameters which constitute the Common-Reflection-Surf ace stacking operator. The wavefield attributes are of use for a multitude of seismic applications. These include among others the computation of the geometrical spreading factor, the determination of the projected Fresnel zone, or the inversion to obtain a velocity model. The stacking velocity can also be expressed in terms of these wavefield attributes and is determined in a reliable way with the CRS Stack.