To the previous SDec-page S D e c   &  M S v E

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Testing SDec & MSvE in a fully automatic mode
with  real marine data (deep-sea case). No apriori info.

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Common offset gather. INPUT. The  offset is 714 m,  [T] = [ sec], [L] = [km].  The [L]-scale is chosen intentionally:  under this scaling  the locations of  intrabed multiples (sea-bottom  -  basalt)  inside the group of primaries are well-identified through the group of the first water-layer reverberation (after 3.5 sec).  It allows one to evaluate visually the quality of multiple suppression : see the next page "DECODING of multiples"   Common offset gather. OUTPUT. Multiples are eliminated in the space-time domain directly, without an intermediate p-tau transform. Note, that the diffraction curves (primaries), which were superimposed on intrabed multiples ,  are saved, while intrabeds themselves (below basalt)  are successfully eliminated  - moreover it concerns the water-layer reverberations after 3.5 sec .  The result of  the "trace-by-trace" processing  testifies for a  fairly good robustness of the approach.

Please, click on the images to enlarge those:

a.   b.  c.
Common offset gathers.
Offsets are :  a. 214 m;  b. 1339 m;  c. 1839 m.

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References:

1. Biryulina, Marina and Ryzhikov, Gennady,  1998,
  Non-Wiener Filter, or Sharp Deconvolution in Elimination  of Multiples:
   60th Mtg. Eur. Assoc. Expl Geophys.,
   Extended Abstracts,  98, Session:  1-27

2. Ryzhikov, Gennady  and  Biryulina, Marina,  1998,
  Sharp Deconvolution in Elimination  of Multiples:
   68th  Ann. Internat. Mtg. Soc. Expl. Geophys.,
   Expanded Abstracts, ST-18.3, pp. 1983-1986

3. Ryzhikov, Gennady  and  Biryulina, Marina,  1999,
  Removal of intrabed multiples via Source-Signature Invariant Inversion,
   69th  Ann. Internat. Mtg. Soc. Expl. Geophys.,
   Expanded Abstracts, SPRO 1.8 , pp. 1076 - 1979

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"Entities are not to be multiplied beyond necessity."

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To the previous SDec-page

DECODING of multiples

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