Paper Summary
Shot based pre-stack depth migrations such as RTM are used to generate a partial image volume for each input shot gather. The conventional migrated image formed by summing together these partial images is often less than optimal in terms of signal to noise, and generally contains unwanted migration artifacts. Recently, the industry has found that non-equal weighting can be used to enhance the image quality. In this paper, we present our weighted stacking methodology called Directional Imaging Stack (DIS), taking into account source direction as is the industry standard, but further taking into account survey geometry, and various selective stack criteria which bring significant additional uplift.
