Deterministic Water-layer Demultiple (DWD)

Model-based water-layer demultiple in marine

Deterministic Water-layer Demultiple is a WesternGeco technique designed for application in shallow marine environments. In these conditions, other demultiple approaches can suffer due to the lack of near offset information, and are unable to adequately predict water layer multiples.

Deterministic Water-layer Demultiple employs a model-driven, non-linear multiple prediction approach and accurately derives both first and higher-order multiple amplitudes (including peglegs). This provides significant improvements in the quality of multiple model and reduced primary attenuation compared to more conventional tau-p deconvolution techniques.

In shallow water environments, it can be highly effective when used in combination with 2D or 3D-SMP to attenuate all modes of surface multiple.

Related information

Moore, I. and R. Bisley, 2006, Multiple Attenuation in Shallow-Water Situations: 68th Meeting, EAGE, Expanded Abstracts, F018.

Related services and products