Jing Wu* and Arthur B. Weglein

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Presentation transcript:

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

Motivation Water Earth

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. 1997 )

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

Motivation Water Earth Anelastic media ? Current ISS attenuator

Outline Wavefield expression Examination of ISS attenuation algorithm Numerical evaluation

Outline Wavefield expression Examination of ISS attenuation algorithm Numerical evaluation

Acoustic/Elastic media 1D & one way wave

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

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

Outline Wavefield expression Examination of ISS attenuation algorithm Numerical evaluation

Two-reflector 1D model

Workflow: testing ISS attenuator with data experienced absorption and dispersion

Workflow: testing ISS attenuator with data experienced absorption and dispersion

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

Workflow: testing ISS attenuator with data experienced absorption and dispersion ( pseudo depth ) ( Weglein et al. 2003 )

Internal multiple with Q Predicted

Internal multiple with Q Predicted Actual

Relation: Predicted & Actual With Q

Relation: Predicted & Actual With Q Without Q

Transmission loss without Q

Transmission loss with Q

Outline Wavefield expression Examination of ISS attenuation algorithm Numerical evaluation

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

Data v.s. Prediction

Actual internal multiple v.s. Prediction

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

Data v.s. Prediction

Actual internal multiple v.s. Prediction

Summary Anelastic media ISS attenuator perfect time & approximate amplitude without known absorption and dispersion model type independent ( Weglein et al. 2003 ) ISS attenuator

( Sam T. Kaplan, Paolo Terenghi ) Summary Anelastic media http://www.mosrp.uh.edu/research/projects/coding ( Sam T. Kaplan, Paolo Terenghi )

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

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

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

Thank you Comments/Questions?