Super-Virtual Refraction Interferometric Redatuming: Enhancing the Refracted Energy
Type
Conference PaperKAUST Department
Earth Science and Engineering ProgramDate
2013-05-23Online Publication Date
2013-05-23Print Publication Date
2012Permanent link to this record
http://hdl.handle.net/10754/594360
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Show full item recordAbstract
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 coverageCitation
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/aseg2012ab348Publisher
Informa UK LimitedJournal
ASEG Extended AbstractsConference/Event name
22nd International Geophysical Conference and ExhibitionAdditional Links
http://www.publish.csiro.au/?paper=ASEG2012ab348ae974a485f413a2113503eed53cd6c53
10.1071/ASEG2012ab348