1. PP and PS imaging and reflectivity of the Ardley coal zone, Red Deer, Alberta Sarah E. Richardson Don C. Lawton

2. Study Area

3. Survey Geometry

4. Cased Hole Well Logs

5. Raw Data P-P S-S P-P S-S

6. Vp/Vs Analysis of Shallow Strata

7. Mini-P VSP Results

8. Big-P vs. Mini-P Corridor Stacks Synthetic seismogram using extracted big-P wavelet Synthetic seismogram using extracted mini-P wavelet Big-P corridor stack Mini-P corridor stack 8-150 Hz sweep8-250 Hz sweep

9. Big-P Amplitude Spectrum

10. Mini-P Amplitude Spectrum

11. Mini-S VSP Results

12. Mini-S Amplitude Spectrum

13. Source Comparison

14. Walkaway VSP-CDP Transform

15. Walkaway VSP-CCP Transform

16. Numerical Modeling

17. Calculated Coal Reflectivity

18. Extracted Coal PP Reflectivity

19. Extracted PS Coal Reflectivity

20. Conclusions Mini-P source is ideal for imaging coal seams at this site Vp/Vs is high (~5) near surface, decreasing to ~2.5 at 300 m P-S waves better resolve coal because of fewer tuning effects Tuning effects in P-P data may give indication of vertical continuity of coal zone

21. Acknowledgements Suncor & Industry Partners Alberta Research Council Larissa Bezouchko, Schlumberger Mike Jones, Schlumberger Alberta Energy Research Institute Natural Sciences and Engineering Research Council of Canada Alberta Ingenuity Fund The CREWES Project