%0 Journal Article
%T PRESTACK DEPTH MIGRATION APPLICATIONS IN SEISMIC REFLECTION DATA: SOUTHERN BLACK SEA SHELF
%J -
%D 2018
%X In this study, prestack depth migration (PSDM) with Kirchoff method were performed on multi-channel seismic reflection data from southern Black Sea shelf. The seismic noises with low and high frequencies were eliminated by editing, muting and filtering on the raw data before PSDM application. The dominant seafloor multiples on common-depth-point (CDP) gathers were attenuated by using SRMA technique. Thus, the signal/noise (S/N) ratio has been increased. The velocity function produced in time domain was transferred into depth domain to have the initial interval depth velocities for PSDM. Then, a series of iterative processes such as residual moveout correction, picking interlayers, updating the velocity section by using grid tomography and PSDM was applied to CDP gathers to flatten all reflection horizons through the depth. The iterations has been ended when all the seismic reflections were flattened as much as possible and final depth migrated seismic section was produced. The depth section revealed the presence of a sedimentary sequence of four different seismic units with a thickness of about 2.5 km in the eastern offshore of Cide. In addition, the ridge-basin structures, folds and faults were observed. The correlation between depth migrated and time migrated seismic sections indicates that the resolution has been increased in depth domain. Thus, this study point out that PSDM produced successful results to move the reflections into their true positions in complex geological structures
%K Y£¿£¿ma £¿ncesi derinlik g£¿£¿¨¹
%K Sismik yans£¿ma
%U http://dergipark.org.tr/iuyerbilim/issue/38412/468209