Penerapan Metode Prestack dan Poststack Time Migration Untuk Meningkatkan Kualitas Data Seismik Laut

Abstract

Migration is the final and primary stages in seismic data processing. Migration was carried out because the results of the seismic stacked section was unable to describe the actual position of the reflector. In this research, Kirchhoff migration was conducted in time domain on seismic recording line-7 in Gulf of Bone, South Sulawesi. Data processing was conducted by migration processes namely poststack and prestack time migration. The succeded of this process is strongly influenced by the velocity model, aperture width, maximum dip to migrate and also frequency. The analysis result of cross section obtained showed that the cross section of prestack time migration had a better results in describing the pattern of reflectivity than poststack time migration. On the research area, normal faults event and the boundary sequences found were characterized by downlap, toplap and onlap field.