Rock property prediction using offset and frequency dependent reflectivity

Modern spectral decomposition techniques allow us to interrogate seismic data on a
frequency-by-frequency basis. Much recent research has focussed on the link between fluid
saturation and the frequency-dependence of seismic properties, and a frequency-dependent
amplitude-versus-offset inversion technique developed in Edinburgh has shown promise as a
fluid discrimination tool. Despite this, geophysicists are still generally unsure how to interpret
the spectrally decomposed data.
The problem lies in the number of factors which can give rise to frequency variations.
Seismic arrivals are typically composite events formed as the superposition of reflections
from many interfaces. Constructive and destructive interference occurs throughout this
process, preferentially enhancing or eliminating different frequencies. Attenuation causes a
loss of frequency content during transmission, while dispersion can cause the reflection
coefficient to vary with frequency. Unfortunately, the seismic processing sequence will
typically introduce unwanted frequency effects into the data.

More information please see the following link: http://www.geos.ed.ac.uk/postgraduate/PhD/getDocument?SerialNo=649