文档介绍：The Marmousi2 Elastic Model and Synthetic Data
Gary Martin, GX Technology
Robert Wiley and Kurt Marfurt, AGL/University of Houston
Outline
Introduction
The Marmousi2 model
Marmousi2 acquisition
Marmousi2 synthetic data
Processing and migration examples
Conclusion
Introduction
This work has been performed as part of the Next Generation Numerical Modeling and Imaging project.
New suite of shared seismic models
Update the popular and very useful Marmousi model using puting power.
The Marmousi2 Model
Original Marmousi
Geologic Model
Created in 1988 by IFP
Based on real geology from West Africa (Angola)
Complex model (160 layers)
km x 3 km
Simulation
Acoustic simulation using a second order (in time and space) finite difference algorithm
4m grid size, frequencies up to 55Hz
Maximum offset km
Marmousi2
Model
Larger model (2X length)
Deep water (450m)
Longer offsets (up to 17km)
Hydrocarbons with AVO effects
Stratigraphic features
Marmousi
Marmousi-2
Marmousi
Marmousi models
Lithology and Features
Water
Salt
Salt
Shale
Shale
Unconformity
Marl
Wet
sands
Water wet sand channels
Faults
Zero P-wave impedance sand
Transition layers at waterbottom
0 X (km) 17
Z (km)
0
Gas sand traps
Oil sand traps
Gas charged sand channel
Oil charged sand channel
Oil and gas sand cap
Layer Properties
Determined by lithology, fluid content, and original Marmousi P-wave velocity.
Lithologies
Sand
Shale
Marl
Salt
Fluids
Water
Gas
Oil (varying GOR)
P-wave Velocity
Extracted from original Marmousi model
Modifications for
Hydrocarbon saturated layers
Salt velocity, reduced to 4500m/s
Velocity parameterization
Constants
Vertical velocity gradients
P-wave velocity is the source for both density and S-wave transforms