Next Generation 3D Imaging Models

1
Next Generation 3D Imaging Models

• Bill Abriel
• Bee Bednar
• Biondo Biondi
• Arthur Cheng
• Stewart Levin

2
Window of opportunity for cooperative project
Computational Cost
3-D two-ways elastic ?
Too expensive
3-D two-ways acoustic
No need of cooperative project
3-D one-way elastic
2.5-D two-ways elastic
Years
3
Window of opportunity for cooperative project
Computational Cost
3-D two-ways elastic ?
3-D two-ways elastic
Too expensive
3-D two-ways acoustic
No need of cooperative project
3-D one-way elastic
2.5-D two-ways elastic
Years
4
Geological Model Working Group task

• Design 3-D Elastic model that is
• Computable in 3-D as an acoustic model (e.g Vp,
  r) by the end of 2007
• Contains challenging and realistic structures
  (salt bodies and faults) and velocity variations
  (shallow gas, low-velocity under salt,
  overpressure) to test the limits of present and
  future 3-D seismic (acquisition and imaging)
  technologies
• Contains 2-3 reservoirs with complex and
  realistic architecture and that produce
  interesting AVO effects when computed as an
  acoustic model (e.g. Vp, r)
• Is ready for fluid-flow simulation and
  computation of elastic/acoustic time-lapse
  surveys
• Identify in the 3-D Elastic model one or two 2-D
  slices
• Suitable for elastic 2.5-D modeling (single line
  of 3-D point source elastic modeling)
• Suitable for non-seismic modeling/inversion, in
  particular for
• Gravity
• Active-sources EM
• Magneto-telluric
• ..

5
Geological Model Working Group Numerical
Modeling Working Group

• Determine parameters of 3-D Elastic model that
  define a realistic computational task and capture
  important features of the model
• Determine maximum frequency needed to resolve
  reservoir stratigraphy
• Determine shot-aperture and recording time to
  capture all dips (overturned events?) present in
  the model
• Determine spatial sampling to avoid spatial
  aliasing
• Define model representation(s), software tools,
  and appropriate interfaces

6
SEG Convention Workshop Goal Gather momentum
before and at SEG convention to secure wide
support for the project (e.g. sign up 20-25
paying companies).

• Conceptual design of 3-D elastic model
• Cross-validation of numerical code against Delft
  physical model (ZMAART)
• Organizational structure and legal framework
• Detailed plan for computations (Grid vendors,
  spare time on companies clusters)
• Initial plan for archival and distribution
  (including data compression)
• Involved sister societies (SPE and AAPG) and
  non-seismic SEG members
• Firm commitments by founding members

7
Objectives of this meeting

• Finalize charter and membership of Geological
  Model Working Group
• Agree on main elements of 3-D Elastic model (e.g.
  salt typology, reservoir stratigraphy, velocity
  anomalies)
• Agree on main contributors to each of these
  elements
• Agree on model representation and software tools.
• Agree on time-table for Geological Model Working
  Group from now to SEG.
• Make progress toward formation of Numerical
  Modeling Working Group
• Make progress toward finalizing organizational
  structure of SEG Modeling Consortium
• Discuss nominations for Project Manager position
  and agree on a recommendation to the Executive
  Committee of the SEG Modeling Consortium