UDOMoRe Depth Overview - Ocean

Empower Geophysics
UDOMoRe Depth Ocean* plug-in for Petrel*
Software overview
*Marks of Schlumberger
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UDOMoRe Depth product overview
UDOMoRe Depth (UDMD) advantage: deliver to Geophysicists seamless control over velocity and
structural depth modeling in Petrel at exploration stage
Seamless
UDMD enables Geophysicists to interactively supervise and
benchmark the performance of alternative velocity and
structural depth modeling scenarios
Control
UDMD delivers into the Petrel Platform the best of stochastic
technology applied to assessing/managing uncertainty on
velocity model parameters, structural depth maps, volumetrics
Integrated in the Petrel platform
UDMD builds on what “Petrel make velocity model”,
“General depth conversion”, “Uncertainty and optimization”,
and “Volume calculation” processes can do in a way
Geophysicists understand and trust outputs
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Input…
UDMD handles usual
input to depth
conversion
Time interpreted horizons
Velocity model trend
Well depth markers
Standard velocity law (ex: V=V0+k*z)
Rescaled seismic velocity maps (ex: V=A*Vmap)
Uncertainty on time picking
Ex: time interpretation (𝜎t=4ms)
Ex:
UDMD also handles
uncertainty on input
to depth conversion
𝜎t map
Uncertainty on velocity model trend
Ex: V0=1840 m/s (𝜎V0=440m/s) ; K=0,38 (𝜎k=0,18)
Ex: A=1*PSDM interval velocity map (𝜎 A=0,1)
Uncertainty on velocity model residuals
Ex: velocity model residual (𝜎 VR=20m/s)
Ex: 𝜎VR map
Seamlessly upload input from Petrel into UDMD
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Output…
UDMD delivers usual
outputs from depth
conversion
Depth maps (tied to wells)
UDMD delivers
additional outputs
from depth
conversion
Depth
uncertainty map
Reliable GRV
curve + P10, P50,
P90 depth maps
Interval velocity maps (tied to wells)
Remaining
potential map
Probability to
hit target above
contact or spill
point
Seamlessly upload output from UDMD into Petrel
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Control based on robust technology…
UDMD approach
Z * ( x0 )  m( x0 )  K 1  K0  Z  [m( xi )]
UDMD runs a stochastic (probabilistic) model based on a proven mathematical
framework: Bayesian Kriging applied to integrating geophysical + well data in the
context of time to depth conversion (Omre, Abrahamsen)
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 est
( x0 , i )  Var Z R ( x0 )  K 1  K0  K0t
Competitive edge of UDMD stochastic (probalistic) model
UDMD approach and
competitive edge

Honours all available well/geophysical data/information

Is 100% consistent with geophysical laws

Is consistent with non-linear geophysical laws (such as V0,k)

Simultaneously handles uncertainty on time picking; on velocity model trend and on
velocity model residuals

Operates on a multilayer basis (not a layer cake basis)

Delivers accurate velocity and depth property models (best estimation of unknown
spatial variables) with reliable confidence intervals (variance of estimation)
UDMD delivers into the Petrel Platform the best of stochastic technology applied to
assessing/managing uncertainty in the context of depth conversion processes
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Control on well implementation…
UDMD handles uncertainty
on time picking
Reliable interval
velocity map
+
UDMD delivers
reliable structural
depth models and
attached uncertainty
UDMD handles uncertainty
on velocity model trend
+
UDMD handles uncertainty
on velocity model residuals
Reliable depth
map
Depth
uncertainty map
Assess/manage uncertainty on velocity model parameters, structural depth maps,
seismic/well tying... Achieve controled well implementation
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Control on volumetrics…
GRV expectations
(Benchmarking results from 3 alternative software solutions)
Probability
P90
UDMD delivers
reliable GRV
expectations and
attached P10, P50,
P90 depth maps
P50
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P10
Volume
1. Most software solutions
No optimization of velocity model parameters
2. Some software solutions
Optimization of velocity model parameters by minimizing well depth mismatches
3. UDOMoRe Depth
Optimization of velocity model parameters by minimizing well depth
mismatches and consistently handling all sources of uncertainty
Assess/manage uncertainty on velocity model parameters, structural depth maps, seismic/well
tying... Achieve realistic volumetrics
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Control on turnaround time…
UDMD delivers
reliable outputs…
fast
Depth maps (tied to wells)
Depth
uncertainty map
Reliable GRV
curve + P10, P50,
P90 depth maps
Interval velocity maps (tied to wells)
Remaining
potential map
Probability to
hit target above
contact or spill
point
All UDMD outputs are computed in a single run! Rapidly supervise and benchmark the performance
of alternative velocity and structural depth modeling scenarios.
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Client feedback on UDOMoRe Depth
Velocity modeling
« Build on what Petrel can do in a way you can trust outputs »*
Structural Depth modeling
« Excellent predictions for target depth »*
« Your results are Geologically consistent »*
Prospect ranking
« You’ve done in two hours what usually takes a week »*
« You’ve done what other softwares could not »*
* Feedback from operations in North Sea + Middle East
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UDOMoRe Depth positioning in Petrel
Complement Make Velocity Model (at all E&P stages)
Stakes
UDMD advantage in Petrel
Reliable velocity models are critical for depth  Consistent uncertainty management
conversion and volumetrics computations
 Control on velocity model parameterization
 For optimized input into Make Velocity Model
Complement Make Velocity Model + General Depth Conversion +
Volume Calculation + Uncertainty & Optimization (at exploration stage)
Stakes
UDMD advantage in Petrel
Reliable structural depth modeling and
 Consistent uncertainty management
volumetrics computations are critical for
 Control on depth conversion
prospect ranking and well implementation.
 Control on volumetrics
However, at exploration stage, there is no
 For better input to Petrel 3D Geomodel
3D Geomodel and limited well control.
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UDOMoRe Depth intuitive interface
Scenario
Input data
Supervision
of velocity
model
parameters
«Geophysicist-friendly»
interface
Supervision
of velocity
model
performance
Launch
computations
UDMD runs powerful stochastic technology behind a “Geophysics” interface,
similar to Petrel’s “Make velocity model”
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Contact
Software
François Mérer, Sales Manager
Direct Line : +33 (0)1 78 77 10 22
Switchboard :+33 (0)1 78 77 10 21
Email: [email protected]
UDOMoRe Depth
Available on Schlumberger’s Ocean Store
www.ocean.slb.com
www.seisquare.com
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