Vsp Detection of Interbed Multiples Using Inside-outside Corridor Stacking

C”n”enti”nal surfxe rcnecrion methods CO‘ derccting and supprc*,ing short-period interbed multiples in Lkvunian reef explorati”” often race difficulties. Predictive dec”n”“lution and C”P stacking of surface reflection data S”metimei d” not suppress the multiples that “brcurc primary reef re”ccti”nl. A Yenicd seibnlic pmmng (VW) method which can help t” differcn,ia,r primarier and multiples is corridor stacking of VSF rcllcction data over selected windows. Using an idea pnqxw4 by Hardagc (1983). the “outside corridors” should bc dominated by primary reflection energy. while he “inside corrid”rs“ should contain in,dxd “l”l,iplcs as well as primaries. Dikrcnccs ktween thr5c ‘inside” and “outride” corridors can indicate the pressnce “f interbed n,ultiples. A”loo”rrelati”ns frum the corridor stacks ciln all” be useful in designing p4ctive deconvolution liltcrs for both the “SP B”d surface renectiur iMa. The “Vera,, assi,ni,a,ion of “SP corrid”r ,Lacks, rangr~limiied stacks of surfdcc data, and synthetics dcrivrd from weII logs aid in the intcrprctation of pussi bls inlcrhcd multiples.