1. Jing Wu* and Arthur B. Weglein
The first test and evaluation of the inverse scattering series internal multiple attenuation algorithm for an attenuating medium
Jing Wu* and Arthur B. Weglein
May 29th, 2014
Austin, TX 1 1

2. Motivation
Water
Earth

3. Approximate amplitude Acoustic/elastic media
Motivation
Water
Earth
Perfect time
&
Approximate amplitude
Acoustic/elastic media
Current
ISS attenuator
( Coates & Weglein 1996; Araújo 1994; Weglein et al )

4. the ISS internal multiple attenuator for anelastic media?
Motivation
Water
Earth
What about
the ISS internal multiple attenuator for anelastic media?

5. Motivation
Water
Earth
Anelastic
media ?
Current
ISS attenuator

6. Outline
Wavefield expression
Examination of ISS attenuation algorithm
Numerical evaluation

7. Outline
Wavefield expression
Examination of ISS attenuation algorithm
Numerical evaluation

8. Acoustic/Elastic media
1D & one way wave

9. Anelastic media
1D & one way wave
( Kjartansson 1979 )

10. Anelastic media 1D & one way wave ( Kjartansson 1979 ) Dispersion
Attenuation

11. Outline
Wavefield expression
Examination of ISS attenuation algorithm
Numerical evaluation

12. Two-reflector 1D model

13. Workflow: testing ISS attenuator with data experienced absorption and dispersion

14. Workflow: testing ISS attenuator with data experienced absorption and dispersion

15. Workflow: testing ISS attenuator with data experienced absorption and dispersion
( pseudo depth )

16. Workflow: testing ISS attenuator with data experienced absorption and dispersion
( pseudo depth )
( Weglein et al )

17. Internal multiple with Q
Predicted

18. Internal multiple with Q
Predicted
Actual

19. Relation: Predicted & Actual
With Q

20. Relation: Predicted & Actual
With Q
Without Q

21. Transmission loss without Q

22. Transmission loss with Q

23. Outline
Wavefield expression
Examination of ISS attenuation algorithm
Numerical evaluation

24. Numerical evaluation Two-reflector model I C1=1500m/s Q1=100

25. Data v.s. Prediction

26. Actual internal multiple v.s. Prediction

27. Numerical evaluation Two-reflector model lI C1=1500m/s Q1=100

28. Data v.s. Prediction

29. Actual internal multiple v.s. Prediction

30. Summary Anelastic media ISS attenuator perfect time &
approximate amplitude
without known absorption and dispersion
model type independent
( Weglein et al )
ISS attenuator

31. ( Sam T. Kaplan, Paolo Terenghi )
Summary
Anelastic media
( Sam T. Kaplan, Paolo Terenghi )

32. Elimination for anelastic media?
Discussion & Plan
Elimination for anelastic media?
Acoustic/elastic elimination
The ISS Q compensation without Q

33. The ISS Q compensation without Q example
Before
After
( Innanen & Lira 2010 )

34. Elimination for anelastic media?
Discussion & Plan
Elimination for anelastic media?
ISS attenuator as an initial step
(a)
(b) ISS higher order anelastic series
ISS Q compensation
without Q
ISS elastic
elimination

36. Thank you
Comments/Questions?