GPU implementation of minimal dispersion recursive operators for reverse time migration

Abstract

The implementation of new recursive operators for computation of numerical derivatives results in minimal dispersion in Reverse Time Migration Prestack Depth Migration (i.e. RTM PSDM). Compared to the more commonly used finite difference operators, the presented new method enables imaging of higher frequencies in RTM PSDM. Since RTM PSDM is the modern method of choice for imaging many exploration targets, computer optimization is an integral part of code development. We present here details of the GPU implementation for newly developed spatial derivative operators which enable routine use in industrial settings.

Use of prestack depth migration for improving the accuracy of horizontal drilling in unconventional reservoirs

“…With recent improvements in PSDM algorithms, such as dispersion-free high-frequency reverse time migration (RTM), we can now image the full frequency range (Bartana et al, 2015) using RTM in onshore unconventional applications. With this, we expect an increase in the ability to image finer detail in seismic data.…”

Accelerating Pre‐stack Kirchhoff Time Migration by Manual Vectorization

“…To the best of our knowledge, this is the first paper where the acceleration of PKTM with SIMD vector instructions is evaluated, showing that the manual vectorization outperforms the other ones obtained by both ICC and OpenMP. We believe that the lessons learned in this work can be applied in novel and complex migration methods, as Reverse Time Migration (RTM) and Least Square Migration (LSM) , and also in other related problems.…”