Case studies on stratigraphic interpretation and sand mapping using volume‐based seismic waveform decomposition

A seismic volume of a certain stratigraphic layer may be decomposed into components for channel analysis. In the first case study of stratigraphic interpretation, the relative amplitude of the first component outlines the channel. The relative amplitude of the second component discovers different lithological or stratigraphical features inside the channel. The relative amplitude of the third component reveals a yoke lake. In the second case study of fluvial sand mapping, multi‐wavelet seismic trace decomposition and reconstruction (An, 2006) was used to enhance the difference of fluvial sand from the other reflections. The fluvial sand is then mapped using volume‐based decomposition on the new reconstructed seismic data in the area. The result show very high correlation with drilling results in the area.