Publication Name: The North West Shelf Australia
Authors: C.R.T. Ramsden, M.R. Hobson and R. Cooper
Date Published: July 1988
Number of Pages: 21
Reference Type: Book Section
Abstract:A major geophysical problem on the North West Shelf of Australia is the presence of strong multiple noise trains that often mask or interfere with the primary reflectors. Besides the strong waterbottom and peg-leg multiples, the problem is compounded by a strong intrabed multiple generated by a Tertiary carbonate wedge which thickens offshore to the north west. "Standard" multiple attenuation techniques e.g., predictive deconvolution and F -k filtering, have had only limited success in attenuating these multiples. The main reason is that the intrabed multiples have a long periodicity and little differential moveout separation from the primary reflections. Current methods of multiple attenuation usually involve a combination of inner trace muting, predictive deconvolution or signature deconvolution, and F -k multiple attenuation.
The solution to the multiple attenuation problem on the North West Shelf appears to lie in the model-based
approaches e.g., Tau-Q deconvolution and wave equation modelling.