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Results
Green’s Theorem Derived Deghosting: Fundamental Analysis, Numerical Test Results, and Impact on ISS Free-Surface Multiple Elimination
Wang, Zhiqiang (University of Houston) | Weglein, Arthur B. (University of Houston) | Mayhan, James D. (University of Houston) | Terenghi, Paolo (University of Houston) | Rivera, Christian (TOTAL)
SUMMARY Ghosts distort the data spectrum and affect the results of many seismic processing algorithms (e.g., multiple elimination, imaging, and inversion). Green’s theorem derived deghosting is a wave theoretic method defined in the frequency-space domain with demonstrated capability, accuracy and flexibility. In this abstract, we present an analytic example and numerical test results of Green’s theorem derived receiver and source side deghosting, and its impact on the inverse scattering series (ISS) free-surface multiple elimination.
Summary Due to coal beds existing in the middle of higher velocity wall rocks, seismic wave interferencing with each other generates guide wave propagating within coal beds and surrounding wall rocks (Liu,1994). Three dimensional channel wave propagating within homogeneous isotropic viscoelastic medium containing coal bed is simulated with an explicit, time-domain, high order staggered finite difference algorithm (Carcione, 1998). General standard linear solid (GSLS) system, representing dispersion/attenuation characteristic at both low frequency band and high frequency band, is used to reflect viscoelastic property. Considering massive computational time-consuming, a parallel computational implementation, utilizing OpenMP strategy, allows investigation of large-scale three dimensional models and/or broadband wave propagation within reasonable execution times.