Özet:

In this study, a multi-channel seismic reflection line taken from the southern Black Sea shelf area was applied with the pre-accumulation Kirchoff method of depth migration (PSDM). Raw data was cleared from noise traces in the shooting groups before PSDM application, from direct and broken arrivals, from low and high frequency noise. Repeated reflections in common depth point (CDP) groups have been suppressed by the surface-dependent repeated reflections removal (SRMA) technique and improved the signal/bullying (S/G) ratio of data. In the PSDM application, the speed functions produced in the time environment for the starting speed are converted into the depth environment intersection. A series of repetitive processes have been applied in the CDP groups to horizontalize all levels deeply. In each repeat; the remaining shifting correction, the marking of the intermediate layers, the updating of the intermediate speed model with grid tomography and the pre-accumulation PSDM application steps have been applied. When the level of reflection is made horizontal to the possible staircase, the repeat process is terminated, the final seismic depth cutting is produced implemented by the immigration process. The depth cut revealed the existence of a rockside, which consists of four different earthquake units with a thickness of approximately 2.5 km from the sea floor in the east outskirts of Cide. In the field, the backs, the curves and the benefits were seen. The depth migration cut, when compared to the time environment migration cut, has seen that the depth environment of the cut has increased its resolution. This study has shown that the PSDM method produces successful results in moving reflections into real places in complex geological structures.

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