Spectral
Decomposition of Seismic Forward Modelled Outcrops of Deepwater Channel and
Levee Deposits
Szuman, Magdalena1, Ian Kane2,
Valerie Charoing3, Lars Nielsen4, Benjamin Kneller1,
Mads Huuse1 (1) University of Aberdeen, Aberdeen, United Kingdom (2)
University of Leeds, Leeds, United Kingdom (3) BHP Billiton Petroleum
(Americas) Inc, Houston, TX (4) Geological Institute, University of Copenhagen,
Copenhagen, Denmark
The size of many stratigraphic
architectural elements, the building blocks of clastic hydrocarbon reservoirs,
are typically below the resolution of conventional seismic data, and their
interpretability on seismic profiles is restricted. Nevertheless their effect
on reservoir connectivity can be profound. Seismic forward modeling of outcrop
analogues holds the potential to significantly enhance hydrocarbon recovery by
establishing the complex relationships between small scale geometries, physical
properties of the rock and the seismic wavelet.
We are pursuing this by analysis of
frequency-domain representation of a seismic signal generated from forward
modelling on outcrop analogues. Time-frequency decomposition has the ability to
illustrate features which are difficult to visualize in the time domain.
Spectral decomposition results show that geologic lithofacies can be identified
even by the incident signals with a wavelength much larger than the dominant
bed thickness (Strauss et al., 2003).
This technique is applied to two elements
of a Cretaceous deepwater continental slope system cropping out in
Strauss, M., Sapir, M.,
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California