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Centennial Talk Elastic Wavefield Seismic Stratigraphy
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Centennial Talk Elastic Wavefield Seismic Stratigraphy

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Bob Hardage's talk on wavefield seismic stratigraphy.

Bob Hardage's talk on wavefield seismic stratigraphy.

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  • 1. Bureau of Economic Geology Centennial Lecture Program MULTICOMPONENT SEISMIC STRATIGRAPHY Dr. Bob A. Hardage
  • 2.
    • First organized research unit of The University of Texas at Austin
    • State Geological Survey of Texas
    • One of three units of the Jackson School of Geosciences
    • Staff — 140, which includes 80 researchers
    Bureau of Economic Geology Bureau of Economic Geology
  • 3.
    • Fossil energy
    • Environment
    • Outreach
    • Advising state and federal government
    • Maintaining collections for research:
      • Cores: 3 repositories, 1,500 miles of core
      • Electric logs : 1,000,000 logs in archive
    Full-Time Research Mission Bureau of Economic Geology
  • 4. Bureau Facilities in Austin, Texas Bureau of Economic Geology
  • 5.  
  • 6. SEISMIC STRATIGRAPHY SEISMIC STRATIGRAPHY “ a method of seismic interpretation based on recognizing seismic sequences and seismic facies and using the spatial geometries, arrangements, and distributions of these sequences and facies to infer depositional environments and lithofacies patterns.” Bureau of Economic Geology
  • 7. ELASTIC WAVEFIELD STRATIGRAPHY “ a method of seismic interpretation based on the concept that any mode of a seismic wavefield may provide unique seismic sequence information and/or unique facies information across some stratigraphic intervals that cannot be observed with other modes of the wavefield.” ELASTIC WAVEFIELD STRATIGRAPHY Bureau of Economic Geology
  • 8. CHRONOSTRATIGRAPHIC SURFACE “ a depositional surface where geologic time is a fixed, constant value at every coordinate on the surface. Synonymous with stratal surface and bedding plane.” CHRONOSTRATIGRAPHIC SURFACE Bureau of Economic Geology
  • 9. LITHOSTRATIGRAPHIC SURFACE “ a depositional surface that has a constant rock type at every surface coordinate.” LITHOSTRATIGRAPHIC SURFACE Bureau of Economic Geology
  • 10.  
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  • 14. DEPOSITIONAL SEQUENCE “ a stratigraphic unit composed of a relatively conformable succession of genetically related strata and bounded at its top and base by unconformities or their correlative conformities.” DEPOSITIONAL SEQUENCE Bureau of Economic Geology
  • 15. SEISMIC SEQUENCE “ a succession of relatively conformable seismic reflections bounded by unconformable reflections or their correlative conformable reflections.” SEISMIC SEQUENCE Bureau of Economic Geology
  • 16. INTERPRETED SEISMIC SEQUENCES
  • 17. FACIES “ a unique aspect or recognizable property of an object.” FACIES Bureau of Economic Geology
  • 18. SEISMIC FACIES UNITS “ groups of seismic reflections whose parameters (configuration, amplitude, continuity, frequency, and interval velocity) differ from adjacent groups.” SEISMIC FACIES UNITS Bureau of Economic Geology
  • 19. - CRITICAL REQUIREMENT – Depth registration of P and S data. - CRITICAL REQUIREMENT – Depth registration of P and S data. Bureau of Economic Geology
  • 20. USING THIN-BED STRATIGRAPHY TO DEPTH REGISTER P-P AND P-SV DATA
  • 21.  
  • 22.  
  • 23. A A B B
  • 24. CASE HISTORIES CASE HISTORIES Bureau of Economic Geology
  • 25.  
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  • 30. COMPARISON OF LOG AND SEISMIC FRACTURE ORIENTATIONS COMPARISON OF LOG AND SEISMIC FRACTURE ORIENTATIONS
  • 31.  
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  • 37. SHELF B - NORTH
  • 38. CLAY CONTENT EARTH MODEL
  • 39. EFFECT OF CLAY CONTENT ON REFLECTIVITY (Sand   = 4%)
  • 40. ALBA WELL LOGS, NORTH SEA MacLeod and others (1999) Duranti and others (2000)
  • 41. ALBA REFLECTIVITY: CLASS 2 RESERVOIR
  • 42. ALBA FIELD, NORTH SEA
  • 43.  
  • 44.  
  • 45. PP AND PS REFLECTIVITIES: BRINE VS GAS-CHARGED SEDIMENTS
  • 46.  
  • 47. ELASTIC WAVEFIELD STRATIGRAPHY “ a method of seismic interpretation based on the concept that any mode of a seismic wavefield may provide unique seismic sequence information and/or unique facies information across some stratigraphic intervals that cannot be observed with other modes of the wavefield.” ELASTIC WAVEFIELD STRATIGRAPHY Bureau of Economic Geology