Abstract

Two campaigns of 3D seismic data in Geleki field of Assam were acquired by two different field crews. During processing these campaigns were merged and Pre stack time migration was carried out. Acquisition footprints arising due to foldage jumps and the geometries were seen even in the Pre Stack Time Migrated volumes. Trace offset distribution in the near middle and far offset classes show large scale differences in their population. Such, irregular distribution of traces result in amplitude striping in the stack volume. Appropriate trace weighting schemes were adopted prior to pre stack time migration to minimize the amplitude striping and footprints