f Extraction of attributes from 3D seismic data

The characterization of seismic data in terms of their spatial properties, such as horizon dip and azimuth, has greatly improved the interpretation of 3D seismic data (Hoetz and Watters 1091). In most cases the 3D seismic attributes are extracted at or between picked seismic horizons. In our paper we present an alternative method for 2D and 3D attribute extraction, that does not require the picking or tracking of horizons. We extend the relation between the 1D complex trace attributes and local spectra (Steeghs et al. 1995) to higher dimensions. Using the local 2D wavenumber-frequency spectrum we can extract dips and azimuths over time slices in 3D seismic data.