Abstract
The spectral decomposition attribute map is one of the most representative data for geological and qualitative geophysical interpretation. The specified technique using RGB mixing allows you to confidently map the seismic recording anomalies that do not appear when analyzing the full spectrum of the signal, as well as evaluate the amplitude response for the center frequency of the analyzed range. However, the question arises the applicability of the results of spectral decomposition in the process of quantitative seismic data interpretation.
There are a number of works, such as Widess (1973), J. Gridley and G. Partyka (1997), Butorin A.V. (2016), which indicate the possibility of using the spectral decomposition results when performing a quantitative assessment of the allocated geological objects thicknesses. This task is relevant because it allows you to add additional information extracted from the amplitudes of a limited frequency range at the stage of dynamic interpretation. Along with, an additional advantage of this technique is the possibility of an independent rapid assessment of the quantitative parameters of geological objects.
In this article, we propose an approach for predicting net thickness using spectral decomposition attribute and apply it to the Achimov wedge-shaped complex. These deposits are characterised by a complex distribution of sands and the occurrence of thin-bed sand bodies that are below the seismic resolution limit.
