Determination of wavefront attributes by differential evolution in the presence of conflicting dips

• DOI: 10.1190/geo2016-0346.1
• Publication Date: 2017-04-18T07:22:51Z
• Authors: Jan Walda; Dirk Gajewski
• Keywords: Midpoint; Maxima and minima; Differential Evolution

The common-reflection surface (CRS) method represents a multidimensional stacking approach; i.e., the is determined in midpoint and offset directions. In 2D case, three attributes span surface, thus requiring three-parameter search contrary to one-parameter classic common-midpoint stack. However, CRS wavefront use data redundancy direction as well, which makes them very useful several seismic applications, e.g., preconditioning, velocity model building, migration. Contrary previous works, we simultaneously estimate using differential evolution subcubes of 3D space. Differential global optimization technique that performs particularly well when objective function unknown. Because apply DE for each subcube, could find local maxima, additionally maximum. Therefore, conflicting dips are recognized can be used stack subsequent attribute-based processing, has been an issue past. Our land results from Donbas Foldbelt southeast Ukraine demonstrate our reduces coherent steep dipping noise reveal more subsurface structures. Application prestack enhancement shows analysis carried out reliably.