Common-Reflection-Surface Stack And Wavefield Attributes

The simulation of a zero-offset stack section from multi-coverage seismic reflection data for 2-D media is a<br>widely used seismic reflection imaging method that reduces the amount of data and enhances the signal-tonoise ratio.<br>The aim of the common-reflection-surfacestack is not only to provide a well-simulated zero-offset stack section<br>but also to determine certain parameters useful for a subsequent inversion. These additional parameters are<br>attributes of hypothetical wavefronts observed at the surface.<br>The main advantage of the common-reflection-surface stack is the use of analytical formulae that describe<br>the kinematic reflection moveout response for inhomogeneous media with curved interfaces. These moveout<br>formulae are valid for arbitrary shot-receiver pairs with respect to a common reference point and do not depend<br>on the macro velocity model. An analytic reflection response fitting best an actual reflection event in the multicoverage<br>data set is determined by coherency analysis.<br>We applied the common-reflection-surface stack to various synthetic and real data sets. In this abstract we<br>restrict ourselves to a synthetic example. For a given model data-derived as well as model-derived (forward<br>calculated) wavefront attributes were calculated. This enables us to verify the wavefront attributes determined<br>by the common-reflection-surface stack exposing a wide agreement with the expected results.