Migration of surface-related multiples: tests on the Sigsbee2B dataset

Guojian Shan and Antoine Guitton

shan@sep.stanford.edu, antoine@sep.stanford.edu

ABSTRACT

We present a theory to generate pseudo-primary shot gathers from multiple and primary reflections by performing a surface-consistent cross-correlation. The estimated pseudo-primaries exhibit the same kinematics as the original dataset with few transformation artifacts. We demonstrate that pseudo-primaries can accurately estimate missing traces as long as the gaps are within the acquisition spread. Pseudo-primaries can also help to extrapolate the data outside the acquisition spread. The image obtained by migrating the pseudo-primary gathers shows that multiple migration can provide valuable information under complex geology.