Zero-offset sections with a deblurring filter in the time domain

Abstract

We present a workflow for reconstructing a high-quality zero-offset reflection section from prestack data. This workflow constructs a migration image volume by prestack time migration (PSTM) using a series of constant-velocity models. A deblurring filter for each constant-velocity model is applied to each time-migration image to get a deblurred image volume. In order to preserve all events in the image volume, each deblurred image panel is demigrated and then summed over the velocity axis. The resulting demigration section is equivalent to a zero-offset reflection section. Compared with the workflow without a deblurring filter, the composite zero-offset reflection section has higher resolution and a better signal-to-noise ratio. Numerical tests are used to validate the effectiveness of this method with both synthetic and field data.