Bob Hardage's talk on wavefield seismic stratigraphy.

1. Bureau of Economic Geology Centennial Lecture Program MULTICOMPONENT SEISMIC STRATIGRAPHY Dr. Bob A. Hardage

4. Bureau Facilities in Austin, Texas Bureau of Economic Geology

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

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

23. A A B B

24. CASE HISTORIES CASE HISTORIES Bureau of Economic Geology

30. COMPARISON OF LOG AND SEISMIC FRACTURE ORIENTATIONS COMPARISON OF LOG AND SEISMIC FRACTURE ORIENTATIONS

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

45. PP AND PS REFLECTIVITIES: BRINE VS GAS-CHARGED SEDIMENTS

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