Study of Reverse Time Migration Method for Areas With Complicated Structures Based on the GPU/CPU System

• Published in: Relative Fidelity Processing of Seismic Data pp. 75 - 115
• Format: Book Chapter
• Language: English
• Published: United Kingdom John Wiley & Sons, Incorporated 2017; John Wiley & Sons, Ltd
• Subjects: 3D reverse time depth migration; CPU system; EARTH SCIENCES; GPU system; Kirchhoff integral migration; one‐way wave equation migration; salt dome boundary imaging; seismic imaging software system; two‐wave prestack depth migration
• ISBN: 9781119052906; 1119052904
• DOI: 10.1002/9781119052913.ch3

This chapter discusses the suitability and practice strategy of the GPU/CPU based two‐wave prestack depth migration technique. There are two commonly used prestack depth migration methods: one‐way wave equation migration and Kirchhoff integral migration. All the main imaging modules of seismic imaging software system require massive parallel computation. The wavefield reverse time extrapolation needs the maximum computation amount via the GPU upon the researches centered on the GPU/CPU. The chapter explains that the 3D reverse time depth migration computation plan, through investigating a large number of references, is relatively more practical. It reviews the feasible execution plan of 3D reverse time depth migration and applies it to the Pre‐Caspian Basin. Through the treatment of prestack reverse time depth migration, the false image fs resulting from the salt dome pull‐up phenomena are effectively eliminated, thus the subsalt imaging accuracy is improved accordingly and the salt dome boundary imaging becomes clearer.