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Depth Imaging
DownUnder GeoSolutions utilises its own
proprietary depth imaging toolkit designed
and developed by its R&D group. The tools
have far-reaching capabilities, having been
developed to meet the requirements of the
most demanding regions in the world.
DownUnder GeoSolutions (Dugeo) has extensive experience
with complex depth imaging projects from all major oil
precincts. This combined experience, along with our advanced
toolkit, means that we are ready and able to tackle any
project,
large or small.
The highlights of the depth imaging toolkit include:
Kirchhoff migration:
True relative amplitude
Isotropic
Anisotropic (VTI, TTI & Tilted Orthorhombic)
Beam
RTM:
Isotropic
Anisotropic in development
Reection and refraction tomography:
Parabolic, non parabolic picks or rst breaks
Smoothing constraints
Supports lateral and depth variable pick weighting
Pick condenceMulti-azimuth
Anisotropy aware
Complete control over what region of model to update,independent
of pick distribution
Unlimited model size
Depth variable smoothing
Picks can be volume or horizon based or combinationof both
Reweighting during optimisation so that outlying picksdo not
inuence nal results
Figure 2
Non-parabolic picks displayed on top ofimage gathers. RMO picks
for tomographycan be parabolic or non-parabolic, horizonor volume
based.
Figure 1
Example of Gamma data which isnormalised RMO. The Gamma
volumeallows a quick overview of RMO.
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Depth Imaging
Figure 3
Better imaging is evident throughout the section. The dipping
events from the centre to the bottom right of the section are
particularlyimportant.
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Figure 4
While the initial processing tends to be somewhat bland in
character, DownUnder GeoSolutions reprocessing displays more
detailed and subtlevariability leading to accurate stratigraphic
interpretation.
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Depth Imaging
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Depth Imaging
The interactive parts of the toolkit are
embedded in DUG Insight, our multi-
dimensional visualisation and
interpretation software. This allows the
geophysicist to immerse themselves
in the data to truly get the best results.
DUG Insight Depth Imager module is now available
commercially.
DUG Insight (full 2D/3D pre-stack intepretation system)
has functionality for:
RMO picking (volume and horizon based)
Velocity model building
Velocity model smoothing
Dip picking with pick condence based smoothing
Gamma displays
Panel parameter picker
Unique vector moveout overlays
Assorted velocity model manipulation utilities(for example 2D
vels to 3D volume)
Figure 6
Multiple iterations of reflection tomography are run to optimise
the velocity model.These figures show how the tomography updated
the model with a low velocity zonecoinciding with a volcano,
resulting in an improved image and more accurate structure.
intal Maton Aft 3 tomoaphc pdats6
Contact us
Youll nd DownUnder GeoSolutions at
www.dugeo.com. Plus we have ofces
in all corners of the world.
Check the website for the location
nearest to you. Or contact our
head ofce in Perth Australia on
tel +61 8 9287 4100,
fax +61 8 9226 5652,
email [email protected].
Figure 5
Displays show atomographicallyderived Q-model.These models
areused in DUG MigQ.
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