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Michelle Sutherland - Best Practices in Developing 3D Geologic Models.pdf

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Texas Alliance of Groundwater Districts
Texas Alliance of Groundwater Districts

Presented at June 6-7 Texas Alliance of Groundwater Districts Business Meeting

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Best Practices in Developing 3D Geologic Models Michelle Sutherland, PE Principal
The Miracle on the Hudson, Models and Experience… January 15, 2009
Outline •What is 3D geological model? •How are 3D geological models being used in the industry? •Best Practices Based on My Experience
What is a 3D Geologic Model?
Begin with Data Points or Lines with XYZ Coordinates
Interpret Data in 3D Space to Create “Watertight”Volumes
Predictive Tool Mapping Tool 3D Visualization: Software that allows one to view 3D data in a 3D environment Numerical Flow Model (MODFLOW) 3D Geologic Model Assumes future pumping Predicts future drawdowns Estimate volume of water in storage Aquifer geometry - bottoms and thicknesses Well locations Map detailed structure, stratigraphy and lithology Screen and injection well intervals Measured Water Levels
How are 3D Geologic Models Being Used in the Industry?
3D Model of Great Britain by the British Geological Survey - 2018 Illustration of the simplified fault network used in the model From: Implicit Geological Modelling: a new approach to 3D volumetric national- scale geological models, Hydrogeology Programme, Internal Report OR/19/004
USGS National 3D Geologic Modeling Effort
3D Geologic Models Provide a Framework for MODFLOW-6 Models
3D Models are Used to Create Instant and an “Infinite”Number of Cross-Sections
3D Geologic Models Form the Basis for Predictive Drilling Tools
Education / Outreach / Litigation Support
Top 5 Best Practices Based on My Experience
Use 3D modeling software instead of GIS software (implicit vs. explicit modeling) • Consistent with the geologist/engineer’s workflow • Automated interpolation tools • Specialized Tools • integrate surface geology maps • integrate existing cross-sections • model faults and folds • structural analysis
Popular 3D Geologic Modeling Software Packages • Leapfrog (Geo, Works, Edge and Energy) • Geomodeller • Paradigm SKUA-GOCAD • Petrel • Earth Volumetric System
Check for Outliers in Data and Prioritize Data Collection Efforts
Choose grid size based on data density and distribution
Don’t over-constrain the data – it creates unrealistic surfaces
High-resolution datasets improve overall modeling results
Top 5 Best Practices • Use specialized software • Check for outliers in data and prioritize data collection efforts • Choose grid size based on data density and distribution • High-resolution datasets improve overall modeling results • Don’t over-constrain the data – it creates unrealistic surfaces
Thank you! Michelle Sutherland, PE 949-702-3622 msutherland@envisionwater.com

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Michelle Sutherland - Best Practices in Developing 3D Geologic Models.pdf

  • 1. Best Practices in Developing 3D Geologic Models Michelle Sutherland, PE Principal
  • 2. The Miracle on the Hudson, Models and Experience… January 15, 2009
  • 3. Outline •What is 3D geological model? •How are 3D geological models being used in the industry? •Best Practices Based on My Experience
  • 4. What is a 3D Geologic Model?
  • 5. Begin with Data Points or Lines with XYZ Coordinates
  • 6. Interpret Data in 3D Space to Create “Watertight”Volumes
  • 7. Predictive Tool Mapping Tool 3D Visualization: Software that allows one to view 3D data in a 3D environment Numerical Flow Model (MODFLOW) 3D Geologic Model Assumes future pumping Predicts future drawdowns Estimate volume of water in storage Aquifer geometry - bottoms and thicknesses Well locations Map detailed structure, stratigraphy and lithology Screen and injection well intervals Measured Water Levels
  • 8. How are 3D Geologic Models Being Used in the Industry?
  • 9. 3D Model of Great Britain by the British Geological Survey - 2018 Illustration of the simplified fault network used in the model From: Implicit Geological Modelling: a new approach to 3D volumetric national- scale geological models, Hydrogeology Programme, Internal Report OR/19/004
  • 10. USGS National 3D Geologic Modeling Effort
  • 11. 3D Geologic Models Provide a Framework for MODFLOW-6 Models
  • 12. 3D Models are Used to Create Instant and an “Infinite”Number of Cross-Sections
  • 13. 3D Geologic Models Form the Basis for Predictive Drilling Tools
  • 14. Education / Outreach / Litigation Support
  • 15. Top 5 Best Practices Based on My Experience
  • 16. Use 3D modeling software instead of GIS software (implicit vs. explicit modeling) • Consistent with the geologist/engineer’s workflow • Automated interpolation tools • Specialized Tools • integrate surface geology maps • integrate existing cross-sections • model faults and folds • structural analysis
  • 17. Popular 3D Geologic Modeling Software Packages • Leapfrog (Geo, Works, Edge and Energy) • Geomodeller • Paradigm SKUA-GOCAD • Petrel • Earth Volumetric System
  • 18. Check for Outliers in Data and Prioritize Data Collection Efforts
  • 19. Choose grid size based on data density and distribution
  • 20. Don’t over-constrain the data – it creates unrealistic surfaces
  • 21. High-resolution datasets improve overall modeling results
  • 22. Top 5 Best Practices • Use specialized software • Check for outliers in data and prioritize data collection efforts • Choose grid size based on data density and distribution • High-resolution datasets improve overall modeling results • Don’t over-constrain the data – it creates unrealistic surfaces
  • 23. Thank you! Michelle Sutherland, PE 949-702-3622 msutherland@envisionwater.com