Reverse Time Migration
Seismic accuracy for complex basins.
AspenTech Subsurface Science & Engineering (SSE) Reverse Time Migration (RTM) is a preferred solution for imaging seismic data in areas of complex wave phenomena. It easily handles the most severe combinations of structural dip with high velocity contrast that are common in salt basins and other structures with complex geology. Its turning wave capability provides enhanced imaging of steep dips and overhangs.
RTM IS AN INTEGRAL PART OF THESE ASPENTECH SSE SOLUTIONS:
RTM performs 2D and 3D prestack depth migration and modeling with isotropic and anisotropic (VTI & TTI) models using a two-way, finite difference solution to the wave equation, including density. The powerful RTM solution improves the accuracy and quality of subsurface images while achieving efficient throughput on high performance clusters, either CPU or GPU.
Reverse Time Migration features include:
- Streamer, Ocean Bottom Cable, Nodal and Onshore data acquisition support
- Mirror Imaging workflows
- Subsurface acquisitions (e.g. VSP)
- Forward modeling to generate 2D/3D synthetic seismic data (add-on)
- CPU and GPU configurations with no “switch” costs
- Offset vector gather creation for velocity QC
- Absorbing boundaries and pre- and post-migration low frequency noise suppression for improved imaging quality
- Poststack migration
ASPENTECH SSE RTM – FULLY INTEGRATED
Reverse Time Migration seamlessly integrates with Echos™ as a licensed module. RTM’s shot record approach is highly suitable for the Echos computational infrastructure for parallelizing workflows that operate on records of data. In Echos, one platform is used for data preconditioning, seismic imaging, and post-image processing.
Velocity models developed and refined in GeoDepth™ and SKUA™ drive workflow efficiencies when updating a seismic image in RTM. RTM is also fully integrated with AspenTech SSE seismic and velocity repositories.
Accessibility to other Echos solutions allows users to:
- Apply intelligent muting
- Pre-condition data
- Stack common image gathers
- Perform post-image processing
WHAT IS REVERSE TIME MIGRATION?
Reverse time migration belongs to the class of two-wave full wave migration solutions. Rather than performing imaging by extrapolating the data in depth, as in traditional one-way full wave solutions, the method solves the wave equation forward in time for the source modeling field and backward in time for the recorded receiver field for that shot. At each time step, the depth image is obtained by cross-correlating the two fields. Reverse time migration has been demonstrated to achieve a significant level of multiple energy attenuation by nature of its two-way extrapolation backward in time.
INNOVATION MEETS COMPLEX OBJECTIVES
Paradigm scientists were recognized by the upstream industry over 30 years ago for early work on Reverse Time Migration. By leveraging the latest high-performance computing technologies and techniques, RTM is a candidate for application to any of the industry’s richest and largest seismic acquisitions.
- 64-bit Red Hat® Enterprise Linux 7.6+, 8.4+
- GPU's (optional): NVIDIA 10 Series, NVIDIA 20 Series, NVIDIA K10 Series