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    Super-Virtual Refraction Interferometric Redatuming: Enhancing the Refracted Energy

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    Type
    Conference Paper
    Authors
    Aldawood, Ali cc
    Alshuhail, Abdulrahman Abdullatif Abdulrahman
    Hanafy, Sherif
    KAUST Department
    Earth Science and Engineering Program
    Date
    2013-05-23
    Online Publication Date
    2013-05-23
    Print Publication Date
    2012
    Permanent link to this record
    http://hdl.handle.net/10754/594360
    
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    Abstract
    onshore seismic data processing. Refraction tomography is becoming a common way to estimate an accurate near surface velocity model. One of the problems with refraction tomography is the low signal to noise ration in far offset data. To improve, we propose using super-virtual refraction interferometry to enhance the weak energy at far offsets. We use Interferometric Green's functions to redatum sources by cross-correlating two traces recorded at receiver stations, A and B, from a source at location W. The result is a redatumed trace with a virtual source at A and a receiver at B, which can also be obtained by correlating two traces recorded at A and B from different shots. Stacking them would enhance the signal-to-noise ratio of this "virtual" trace. We next augment redatuming with convolution and stacking. The trace recorded at B from a virtual source at A is convolved with the original trace recorded at A from a source at W. The result is a "super-virtual" trace at B in the far-offset from a source at W. Stacking N traces gives a vN-improvement. We applied our method to noisy synthetic and field data recorded over a complex near-surface and we could pick more traces at far offsets. It was possible to accommodate more picks resulting in a better subsurface coverage
    Citation
    Aldawood, A., Alshuhail, A., & Hanafy, S. (2012). Super-Virtual Refraction Interferometric Redatuming: Enhancing the Refracted Energy. ASEG Extended Abstracts, 2012(1), 1–10. doi:10.1071/aseg2012ab348
    Publisher
    Informa UK Limited
    Journal
    ASEG Extended Abstracts
    Conference/Event name
    22nd International Geophysical Conference and Exhibition
    DOI
    10.1071/ASEG2012ab348
    Additional Links
    http://www.publish.csiro.au/?paper=ASEG2012ab348
    ae974a485f413a2113503eed53cd6c53
    10.1071/ASEG2012ab348
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