Paper Summary
It is sometimes remarked that pre-stack Kirchhoff depth migrated images have a lower frequency content than their time-domain counterparts. Various factors that influence frequency content during migration are evaluated, with the object of assessing the reasons for
potential loss of bandwidth in migrated data. In the following examples, the nature and cause of these various factors that can impact the frequency content are summarized. The factors are examined to determine their effects on depth migration more than on time migration, or Kirchhoff migration more than wavefield extrapolation schemes.
We believe that there is no inherent reason for the bandwidth of Kirchhoff depth migrated data to be worse than other migrated data, by demonstrating and offering recommendations to ensure optimal frequency content in the processed output image.