Glöckner, Martina, Gajewski, Dirk, Kläschen, Dirk , Muff, Sina and Berndt, Christian (2018) Wavefront tomography with diffraction-only 3D P-cable data. SEG Technical Program Expanded Abstracts, 2018 . pp. 5133-5136. DOI 10.1190/segam2018-2996743.1.

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Abstract

P-cable data often do not allow model building by conventional methods because of an insufficient offset to target ratio. Diffractions, however, provide a tool for model building, even for Zero-Offset data. Here, we introduce a diffraction-based velocity analysis that provides seismic velocity information without the need of acquiring ocean bottom seismometer data. The diffraction based processing uses a multiparameter stacking operator which naturally enhances diffractions and at the same time generate kinematic wavefield attributes. These attributes together with the stack serve as input for a wavefront tomography and generate a depth velocity model in an automated fashion. An additional advantage of diffraction tomography is the scatter potential which yields a large area of illumination in the tomography compared to a pure reflection processing. The illuminated area is two to three times larger and more velocity information can be calculated from the same amount of data.

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