Overview of
Stark Reality Plugins for
OpendTect
Coming soon
to a workstation near you
Surface Segments
• Does not require
interpreted horizons.
• Produce attribute
volumes
• Horizontal slices contain
surface segments which
illustrate inherent:
– event continuity,
– dip magnitude and
– stratigraphic
relationships
Surface Segments
• Time slice followed by series of thicker surface
segments; I would like for it to show a local
peak or local trough.
• Follow with slice up or down amount equal to
thickness to show how boundaries match.
• Color stack to show fluid change across fault
• Color stack to show how things don’t stack
Penobscot 1980 ms
Penobscot 2000 ms
Penobscot 2020 ms
Penobscot 2040 ms
Penobscot 2060 ms
Penobscot 1980 ms
Penobscot 1980 ms
Penobscot 1980 ms
Penobscot 1980 ms
Penobscot 2000 ms
Penobscot 2020 ms
Penobscot 2040 ms
Penobscot 2060 ms
Penobscot 1980 ms
Penobscot 2000 ms
Penobscot 2020 ms
Penobscot 2040 ms
Penobscot 2060 ms
Quick Dip
Quick
Dip
• Uses a fast algorithm for
approximating dip
• Produces volumes of:
–
–
–
–
–
Inline dip
Crossline dip,
Dip magnitude,
Dip Azimuth,
Dip quality estimates
• Quality estimates often
indicate faults,
unconformities or other
stratigraphic boundaries
3D Volume Classify
Icon
Coming
Soon
• Utilizes RGB color blend
concept to produce a
classification (facies)
volume
• Normally outputs 230 or
fewer classes
• Multiple classification
orgainzations provided
• Generates an error
volume to quality control
classification results
Anomalousness
• Produces an
“Anomalousness”
attribute volume
• Utilizes 2, 3, or 4 input
volumes
• Anomalousness
calculated using one of
three algorithms
• Optionally outputs
histogram volumes
Horizon Toolkit
• A collection of tools to
post process
interpreted horizons
– Closure identification is
one unique tool
– Automatic mis-pick and
hole closures
– Smoothing methods
– Residual structure
– Small fault identify
Relative Geologic Time - Basic
• Utilizes pre-interpreted
horizons to generate a
Relative Geologic Time
(RGT) Volume.
• User has control over
how ages are assigned to
horizons and how ages
are interpolated between
horizons.
• Useful in combination
with Volume Rendering
plugin
Temporal Frequency Enhancements
• Implements the “Spin”
enhancement method.
• Integer multiples scale
the Fourier spectra as
shown to left.
• Provided stratigraphic
interpretation aids
• Also implements yet to
be published method
Teapot Dome Example - spectra
N=1
N=2
N=3
N=1
N=2
N=3
Teapot Dome Example - timeslice
N=1
N=2
N=3
3D wedge model
Inline
Crossline
Mapped top and base
3D wedge model
Wedge Isopach
Positive Base
Thin
Thick
Negative Base
Original Data
3D wedge model
Wedge Isopach
Positive Base
Thin
Thick
Negative Base
N = 1+3 Data
Discontinuity Volumes
Icon
Coming
Soon
• A collection of several
unpublished methods
to identify discontinuity
locations
• Provides alternate to
coherency methods
• Discontinuities tend to
cluster along faults and
unconformities, and be
dispersed when data
are noisy
Spectral Decomposition
• Utilizes several methods
to separate input data
into spectral bands
• Implements the IFS
method (Instantaneous
Frequency Spectra)
– Sum across frequency
approximate absolute
value of input trace
– Sum across time
approximates Fourier
spectra of time window
Input Data
Input Data total Spectrum
5 Hz
15 Hz
STARK Research Proprietary
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25 Hz
STARK Research Proprietary
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35 Hz
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45 Hz
STARK Research Proprietary
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55 Hz
STARK Research Proprietary
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65 Hz
STARK Research Proprietary
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75 Hz
STARK Research Proprietary
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85 Hz
STARK Research Proprietary
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Relative Geologic Time - Intermediate
• This proposed plugin
will convert a DGBES
HorizonCube to a Stark
Reality RGT Volume and
a Stark Reality RGT
(Age) Volume to a
DGBES HorizonCube
Wheeler Volume Generation
• Utilizes an RGT volume
to convert seismic
attribute volumes from
a vertical axis of travel
time (depth) to relative
geologic time
• Based on method
presented by Stark,
2005.
Multi-Volume Renderer
• GPU based volume
rendering of multiple
volumes
• Enables real-time
volume sculpting when
opacity is driven by
either RGT or
anomalousness
volumes
RGT Attributes
Icon
Coming
Soon
• Utilizes an RGT volume to
generate age based
attributes such as:
– Discontinuities,
– Fault and unconformity
locations,
– Fault throw and heave
– Dip magnitude or azimuth
– Isopach versus age
– Closure volumes, etc.
• See US patent 6,853,922
Stack Quality Measures
Icon
Coming
Soon
• Tools and workflows to
estimate the quality of
3D-prestack migrations
using either partial offset
(angle) stacks, or prestack gathers
• Tools and workflows to
correct for some
deficiencies in the prestack migrations for AVO
and structural
interpretations
Beyond Nyquist Stack
• Research project
looking for a sponsor
• This technique has
potential to improve
velocity estimation
accuracy and frequency
bandwidth recovered
from conventionally
collected seismic data
• More potential if data
collected differently
Send inquiries for additional
information to:
starkreality@verizon.net