Feathering correction for 3‐D marine data

The organization of 3D multi-fold seismic data on a regular grid is commonly performed by binning the data in midpoint space prior to stacking, An alternative approach using DMO & DMO-1 is designed to reorganize the data on a regular grid and remove cable feathering. With this approach the 3D data are conditioned for pre-stack processing, especially for inline pre-stack migration. An enhancement of the DMO algorithm accounts for the irregular distribution of traces in 3D surveys and minimizes DMO artifacts. The spatial distribution of input traces is measured in a preliminary stage. This measurement is passed as additional information to the DMO program, and is used to correct for the irregularity. The preprocessing program operates only on the coordinates and serves as an additional tool for evaluating the spatial sampling.