CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Exploration Geophysics   
Exploration Geophysics
http://www.aseg.org.au
  The Journal of the Australian Society of Exploration Geophysicists
 
blank image Search
 
blank image blank image
blank image
 
  Advanced Search
   

Journal Home
About the Journal
Editorial Committee
Contacts
For Advertisers
Content
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Sample Issue
For Authors
General Information
Instructions to Authors
Submit Article
Open Access
For Referees
Referee Guidelines
Review Article
Annual Referee Index
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with CP
blank image
facebook twitter youtube

red arrow Submit Article
blank image
Use the online submission system to send us your paper.

red arrow Preview
blank image
Preview, the Magazine of the Australian Society of Exploration Geophysicists, is also available online.

red arrow ASEG Extended Abstracts
blank image
ASEG Extended Abstracts, drawn from the ASEGĀ“s conferencces, is also available online.

 

Article << Previous     |     Next >>   Contents Vol 37(1)

Reverse-time migration using the Poynting vector

K. Yoon and K.J. Marfurt

Exploration Geophysics 37(1) 102 - 107
Published: 2006

Abstract

Recently, rapid developments in computer hardware have enabled reverse-time migration to be applied to various production imaging problems. As a wave-equation technique using the two-way wave equation, reverse-time migration can handle not only multi-path arrivals but also steep dips and overturned reflections. However, reverse-time migration causes unwanted artefacts, which arise from the two-way characteristics of the hyperbolic wave equation. Zero-lag cross correlation with diving waves, head waves and back-scattered waves result in spurious artefacts. These strong artefacts have the common feature that the correlating forward and backward wavefields propagate in almost the opposite direction to each other at each correlation point. This is because the ray paths of the forward and backward wavefields are almost identical. In this paper, we present several tactics to avoid artefacts in shot-domain reverse-time migration. Simple muting of a shot gather before migration, or wavefront migration which performs correlation only within a time window following first arriving travel times, are useful in suppressing artefacts. Calculating the wave propagation direction from the Poynting vector gives rise to a new imaging condition, which can eliminate strong artefacts and can produce common image gathers in the reflection angle domain.



Full text doi:10.1071/EG06102

© ASEG 2006

blank image
Subscriber Login
Username:
Password:  

 
PDF (1.6 MB) $25
 Export Citation
 Print
  
    
Legal & Privacy | Contact Us | Help

CSIRO

© CSIRO 1996-2014