Abstract

A small 3D land seismic data set, whose aerial extent is less than the desired migration aperture, is subjected to full 3D PreStack Time Migration. Then imaged subsurface will be encroached by the migration artifacts and may relinquish the scope of proper interpretation. So, to obtain fully migrated data in the area of interest, the data are to be added from the neighboring area with honoring the optimum migration aperture requirement and extended beyond the area of interest to preserve the captured reflection and diffraction energy in the pre stack mode. The present data set is pre-stack merged seamlessly with available old vintage data sets with appropriate conditioning, then PSTM has brought out clearly the structurally complex basement, which would not have been the case, had we not included the old data.