1 / 13

Two-way Reverse Time Migration for HOCIGs and VOCIGs

Explore the theory, examples, and conclusions of Two-way Reverse Time Migration for Horizontal Offset Common Image Gathers (HOCIGs) and Vertical Offset Common Image Gathers (VOCIGs) with detailed forward and back-propagation techniques. Examples include frequency and time domain images.

madisons
Download Presentation

Two-way Reverse Time Migration for HOCIGs and VOCIGs

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. HOCIGs and VOCIGs via Two-way Reverse Time Migration William Symes, Fuchun Gao Rice University TRIP Oct 29, 2004

  2. Outline • Common image gathers (offset domain) 1. Theory 2. HOCIGs and VOCIGs--- examples • Conclusions

  3. Two-way Reverse Time Migration 1. Forward propagation: finite difference solution to acoustic equation by where : impedance matrix. : seismic wave field vector. : source vector. Pratt et al.(1998)

  4. Two-way Reverse Time Migration ( : complex conjugate) 2. Back-propagation of data 3. Horizontal offset image (frequency domain) Vertical offset image (frequency domain) Common image gathers (time domain): where : recorded wave fields. : back-propagated waves : source location. : image location

  5. Example 1 No. of source = 51 No. of receiver = 51 Source interval =10m Receiver interval=10m

  6. Frequency domain CIGs

  7. Frequency domain CIGs, tapered

  8. time domain CIGs

  9. Example 2 No. of source =101 No. of receiver = 101 Source interval =1.5m Receiver interval=1.5m

  10. Time domain Frequency domain HOCIGs

  11. Example 3

  12. VOCIGs

  13. HOCIG Filtered HOCIG

More Related